Patent Publication Number: US-11652945-B2

Title: Control method, control device, and program

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of U.S. patent application Ser. No. 16/952,785, filed Nov. 19, 2020, with is a continuation application of U.S. patent application Ser. No. 15/532,351, filed Jun. 1, 2017, and issued as U.S. Pat. No. 10,958,804 Mar. 23, 2021, which is a 371 Nationalization of PCT/JP2015/005537, filed Nov. 4, 2015 and claims priority of Japanese Priority Patent Application JP 2014-261005 filed Dec. 24, 2014, the entire contents of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a control method, a control device, and a program. 
     BACKGROUND ART 
     Recently, products applying communication technology to imaging devices are becoming commonly available. The operation of such an imaging device may be controlled through communication from an external information processing device or the like. 
     For example, Patent Literature 1 discloses a technique related to a system that controls the operation of multiple imaging devices through communication using a remote control, and displays images obtained from each of the multiple imaging devices on a display unit provided on the remote control. 
     Also, Patent Literature 2 discloses a technique related to a system in which a monitor and multiple imaging devices are connected through communication, and in which images transmitted from each of the multiple imaging devices are displayed on the monitor. 
     CITATION LIST 
     Patent Literature 
     [PTL 1]
     JP 2001-326845A   

     [PTL 2]
     JP 2012-119846A   

     SUMMARY 
     Technical Problem 
     However, with the technique disclosed in Patent Literature 1, the displayed image is switched as a result of the user selecting one from among the multiple imaging devices, and control being switched to the selected imaging device. For this reason, it is time-consuming for the user to perceive all images related to the multiple imaging devices. 
     On the other hand, with the technique disclosed in Patent Literature 2, a list of images to be acquired is displayed on the monitor, but images are transmitted and received via a pre-established network. For this reason, flexibility of communication format is impaired in some cases. 
     Accordingly, an embodiment of the present disclosure proposes a new and improved control method, control device, and program capable of enabling a user to easily perceive the images corresponding to each of multiple connected imaging devices, while also retaining flexibility in the format of communication with the imaging devices. 
     Solution to Problem 
     According to an embodiment of the present disclosure, there is provided a control method including: wirelessly communicating with a plurality of imaging devices; and displaying identifiers corresponding respectively to the plurality of imaging devices, on the basis of the communication 
     According to another embodiment of the present disclosure, there is provided a control device including: a communication unit that wirelessly communicates with each of a plurality of imaging devices; and a controller that displays a list of identifiers corresponding respectively to the plurality of imaging devices, on the basis of the communication. 
     According to still another embodiment of the present disclosure, there is provided a program causing a computing device to: switch between a multiple-unit control mode and a single-unit control mode, when in the multiple-unit control mode: display identifiers corresponding respectively to a plurality of imaging devices, and in response to a given user input, control a given operation of each of the plurality of imaging device via wireless communication connections; and when in the single-unit control mode: display an identifier corresponding to a selected one of the plurality of imaging devices, and in response to the given user input, control the given operation of the selected one of the plurality of imaging devices and not the others of the plurality of imaging devices. 
     Advantageous Effects of Invention 
     According to one or more of embodiments of the present disclosure as described above, there is provided a control method, control device, and program capable of enabling a user to easily perceive the images corresponding to each of multiple connected imaging devices, while also retaining flexibility in the format of communication with the imaging devices. Note that the above advantageous effects are not strictly limiting, and that any advantageous effect indicated in the present disclosure or another advantageous effect that may be reasoned from the present disclosure may also be exhibited in addition to, or instead of, the above advantageous effects. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a diagram for explaining an overview of a control device according to an embodiment of the present disclosure. 
         FIG.  2    is a block diagram illustrating a schematic functional configuration of a control device and an imaging device according to a first embodiment of the present disclosure. 
         FIG.  3    is a flowchart that conceptually illustrates a summary of overall processing on a control device according to an embodiment. 
         FIG.  4    is a diagram for explaining a process of configuring a communication connection with an imaging device on a control device according to an embodiment. 
         FIG.  5    is a diagram for explaining a process of changing a communication mode on a control device according to an embodiment. 
         FIG.  6    is a diagram illustrating screen transitions related to a process of activating a control app on a control device according to an embodiment. 
         FIG.  7    is a diagram for explaining an operation of configuring a communication mode on an imaging device according to an embodiment. 
         FIG.  8    is a diagram for explaining a process of connecting to an imaging device on a control device according to an embodiment. 
         FIG.  9    is a diagram illustrating an example of an imaging device list screen displayed on a control device according to an embodiment. 
         FIG.  10    is a diagram illustrating an example of a single-view screen displayed on a control device according to an embodiment. 
         FIG.  11    is a diagram illustrating an example of a multi-view screen displayed on a control device according to an embodiment. 
         FIG.  12 A  is a diagram illustrating an example of a display format of one or two display sets on a control device according to an embodiment. 
         FIG.  12 B  is a diagram illustrating an example of a display format of one or two display sets on a control device according to an embodiment. 
         FIG.  12 C  is a diagram illustrating an example of a display format of one or two display sets on a control device according to an embodiment. 
         FIG.  13 A  is a diagram illustrating an example of a display format of three or four display sets on a control device according to an embodiment. 
         FIG.  13 B  is a diagram illustrating an example of a display format of three or four display sets on a control device according to an embodiment. 
         FIG.  13 C  is a diagram illustrating an example of a display format of three or four display sets on a control device according to an embodiment. 
         FIG.  14 A  is a diagram illustrating an example of a display format of five or six display sets on a control device according to an embodiment. 
         FIG.  14 B  is a diagram illustrating an example of a display format of five or six display sets on a control device according to an embodiment. 
         FIG.  14 C  is a diagram illustrating an example of a display format of five or six display sets on a control device according to an embodiment. 
         FIG.  15 A  is a diagram illustrating an example of a display format of seven to nine display sets on a control device according to an embodiment. 
         FIG.  15 B  is a diagram illustrating an example of a display format of ten to twelve display sets on a control device according to an embodiment. 
         FIG.  16    is a diagram illustrating an example of a process of switching a single-view screen by going through a multi-view screen on a control device according to an embodiment. 
         FIG.  17    is a diagram illustrating an example of a process of switching a single-view screen by going through an imaging device list screen on a control device according to an embodiment. 
         FIG.  18    is a diagram for explaining a shooting process on a single-view screen displayed by a control device according to an embodiment. 
         FIG.  19    is a diagram for explaining a shooting process on a multi-view screen displayed by a control device according to an embodiment. 
         FIG.  20    is a diagram for explaining a process of deciding the content of an instruction related to image recording to an imaging device on a control device according to an embodiment. 
         FIG.  21    is a diagram illustrating an example of configuration information for image preview and saving according to a first modification of an embodiment. 
         FIG.  22    is a diagram for explaining an example of an operation of transmitting a settings instruction to an imaging device on a single-view screen of a control device according to a second modification of an embodiment. 
         FIG.  23    is a diagram for explaining an example of an operation of transmitting a settings instruction to an imaging device on a multi-view screen of a control device according to a second modification of an embodiment. 
         FIG.  24 A  is a diagram for explaining an example of a display indicating that a performed operation is unsupported on a control device according to a third modification of an embodiment. 
         FIG.  24 B  is a diagram for explaining an example of a display indicating that a performed operation is unsupported on a control device according to a third modification of an embodiment. 
         FIG.  24 C  is a diagram for explaining an example of a display indicating that a performed operation is unsupported on a control device according to a third modification of an embodiment. 
         FIG.  24 D  is a diagram for explaining an example of a display indicating that a performed operation is unsupported on a control device according to a third modification of an embodiment. 
         FIG.  25    is a flowchart that conceptually illustrates a summary of overall processing by a control device according to a second embodiment of the present disclosure. 
         FIG.  26 A  is a diagram for explaining a display control process when a new communication connection with an imaging device is made on a control device according to an embodiment. 
         FIG.  26 B  is a diagram for explaining a display control process when a new communication connection with an imaging device is made on a control device according to an embodiment. 
         FIG.  26 C  is a diagram for explaining a display control process when a new communication connection with an imaging device is made on a control device according to an embodiment. 
         FIG.  26 D  is a diagram for explaining a display control process when a new communication connection with an imaging device is made on a control device according to an embodiment. 
         FIG.  27 A  is a diagram for explaining a display control process when communication with an imaging device is disconnected on a control device according to an embodiment. 
         FIG.  27 B  is a diagram for explaining a display control process when communication with an imaging device is disconnected on a control device according to an embodiment. 
         FIG.  27 C  is a diagram for explaining a display control process when communication with an imaging device is disconnected on a control device according to an embodiment. 
         FIG.  28    is a diagram for explaining a display control process when communication with an imaging device is disconnected on a control device according to an embodiment. 
         FIG.  29    is a diagram illustrating an example of a display related to an ongoing error on a single-view screen of a control device according to a modification of an embodiment. 
         FIG.  30    is a diagram illustrating an example of a display related to an ongoing error on a multi-view screen of a control device according to a modification of an embodiment. 
         FIG.  31 A  is a diagram illustrating an example of a display related to an isolated error on a single-view screen of a control device according to a modification of an embodiment. 
         FIG.  31 B  is a diagram illustrating an example of a display related to an isolated error on a single-view screen of a control device according to a modification of an embodiment. 
         FIG.  32    is a diagram illustrating an example of a display related to an isolated error on a multi-view screen of a control device according to a modification of an embodiment. 
         FIG.  33    is an explanatory diagram illustrating a hardware configuration of a control device according to an embodiment of the present disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the appended drawings. Note that, in this specification and the appended drawings, structural elements that have substantially the same function and structure are denoted with the same reference numerals, and repeated explanation of these structural elements is omitted. 
     Hereinafter, the description will proceed in the following order.
     1. Overview of control device according to embodiment of present disclosure   2. First embodiment (operational control based on user operation)   3. Second embodiment (operational control based on status change in imaging device)   4. Hardware configuration of control device according to embodiment of present disclosure   5. Conclusion   

     1. OVERVIEW OF CONTROL DEVICE ACCORDING TO EMBODIMENT OF PRESENT DISCLOSURE 
     First, an overview of a control device according to an embodiment of the present disclosure will be described with reference to  FIG.  1   .  FIG.  1    is a diagram for explaining an overview of a control device according to an embodiment of the present disclosure. 
     The control device  100  is a portable mobile communication terminal carried by a user, and includes a function like an access point (AP) that receives a connection from another device via wireless communication. The control device  100  is also equipped with a display unit that displays images. For this reason, the control device  100  is capable of acquiring images from each of multiple imaging devices  200  via wireless communication, and displaying the acquired images on the display unit. 
     For example, as illustrated in  FIG.  1   , the control device  100  is connected via wireless communication to each of imaging devices  200 A to  200 C, and causes the display unit to display images acquired from the imaging device  200 A, for example. Note that the chain-line arrows illustrated in  FIG.  1    indicate the transmission of connection requests, images, and the like from each of the imaging devices  200 A to  200 C. 
     At this point, a device which is connected to multiple imaging devices and which displays images obtained from each of the multiple imaging devices generally switches the displayed image by switching the connected imaging device  200 . For this reason, it is time-consuming for the user to perceive all images related to the multiple imaging devices  200 . 
     On the other hand, there exists a device that displays on a monitor or the like a list of images acquired from each of multiple imaging devices  200 , but with such a device, images are generally transmitted and received via a pre-established network, such as wired communication, for example. For this reason, flexibility with respect to changing the communication format is impaired in some cases. For example, there may be a cost and time associated with changing the connected imaging device or changing the communication pathway. 
     Accordingly, the control device  100  according to an embodiment of the present disclosure is connected to multiple imaging devices via wireless communication, and communicates with the multiple imaging devices. Additionally, the control device  100  specifies each of the images corresponding to each of the multiple imaging devices by the communication, and lists the specified images. 
     For example, the control device  100  receives images via wireless communication from each of the imaging devices  200 A to  200 C as illustrated in  FIG.  1   , and displays each of the received images in a list on the display unit. 
     For this reason, the control device  100  is connected via wireless communication to each of the multiple imaging devices  200 , and each of the images acquired from each of the multiple imaging devices  200  is perceivably displayed at a glance. 
     Consequently, it is possible for the user to easily perceive the images corresponding to each of the multiple connected imaging devices  200 , while also retaining flexibility in the format of communication with the imaging devices  200 . Note that although  FIG.  1    illustrates a smartphone as an example of the control device  100 , the control device  100  may also be mobile communication terminal such as a tablet, digital camera, portable game console, or personal digital assistant (PDA). Also, for the sake of convenience, the control device  100  according to the first and second embodiments will be distinguished by appending a number corresponding to the embodiment, such as the control device  100 - 1  and the control device  100 - 2 . 
     2. FIRST EMBODIMENT (OPERATIONAL CONTROL BASED ON USER OPERATION) 
     The above thus summarizes a control device  100  according to an embodiment of the present disclosure. Next, a control device  100 - 1  according to the first embodiment of the present disclosure will be described. The control device  100 - 1  lists the images specified by communication with each of the imaging devices  200 , and conducts centralized operational control based on user operations with respect to each of the imaging devices  200  corresponding to each of the listed images. 
     &lt;2-1. Device Configuration&gt; 
     First, a configuration of the control device  100 - 1  according to the first embodiment of the present disclosure will be described with reference to  FIG.  2   .  FIG.  2    is a block diagram illustrating a schematic functional configuration of the control device  100 - 1  and the imaging device  200  according to the first embodiment of the present disclosure. 
     (Functional Configuration of Imaging Device) 
     As illustrated in  FIG.  2   , the imaging device  200  is equipped with an operation detector  202 , a controller  204 , storage  206 , a communication unit  208 , and an imaging unit  210 . 
     The operation detector  202  converts a user operation with respect to the imaging device  200  into input. Specifically, the operation detector  202  generates input information according to an operation by the user, and provides the generated input information to the controller  204 . For example, the operation detector  202  detects a user operation on a button-type or touchpad-type input device provided separately on the imaging device  200 , or on a touch panel-type input device integrated with a display unit. 
     The controller  204  controls the overall operation of the imaging device  200 . Specifically, the controller  204  controls communication by the communication unit  208 , controls the status of the imaging device  200 , and issues an imaging instruction to the imaging unit  210 . 
     For example, when the input information provided from the operation detector  202  indicates a connection request to connect to the control device  100 - 1 , the controller  204  causes the communication unit  208  to establish a communication connection with the control device  100 - 1 . Also, the controller  204  causes the communication unit  208  to transmit images obtained by imaging of the imaging unit  210  to the control device  100 - 1 . Also, when information indicating the specification of a shooting mode is received from the control device  100 - 1 , the controller  204  changes the shooting mode of the imaging device  200  to the specified shooting mode. Also, when information indicating to start or stop recording is received from the control device  100 - 1 , the controller  204  instructs the imaging unit  210  to start or stop operating. 
     The storage  206  stores images obtained by imaging of the imaging unit  210 . Specifically, when an image is obtained by imaging of the imaging unit  210 , the storage  206  stores the image on the basis of an instruction from the controller  204 . Note that an image transmitted to the control device  100 - 1  by the communication unit  208  may be a copy of an image stored in the storage  206  of the imaging device  200 . 
     The communication unit  208  wirelessly communicates with the control device  100 - 1 . Specifically, the communication unit  208 , on the basis of an instruction from the controller  204 , establishes a communication connection by requesting the control device  100 - 1  for a connection using wireless communication. For example, the communication unit  208  receives operation instruction information from the control device  100 - 1 , and transmits data such as images to the control device  100 - 1 . Note that the communication unit  208  may wirelessly communicate with the control device  100 - 1  using a standard such as Wi-Fi (registered trademark), Bluetooth (registered trademark), or ZigBee (registered trademark). 
     The imaging unit  210  conducts imaging according to a shooting mode. Specifically, on the basis of an instruction and a shooting mode from the controller  204 , the imaging unit  210  captures images consecutively to record a moving image, or captures a single image to record a still image. The shooting mode includes modes for recording a moving image such as video shooting, interval shooting, loop recording, audio recording, and continuous still image shooting (hereinafter also called still image (continuous)), and also includes a mode for recording a still image such as a single still image (hereinafter also called still image (normal)). For example, the imaging unit  210  may be equipped with an imaging optical system such as a photographic lens that condenses light and a zoom lens, as well as a signal conversion sensor such as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). 
     (Functional Configuration of Control Device) 
     In addition, as illustrated in  FIG.  2   , the control device  100 - 1  is equipped with a communication unit  102 , a controller  104 , storage  106 , a display unit  108 , and an operation detector  110 . Note that part of the controller  104  may function as an application related to operational control of the imaging device  200  (hereinafter also called the control app). 
     The communication unit  102  wirelessly communicates with the imaging device  200 . Specifically, the communication unit  102  establishes a communication connection with the imaging device  200  by conducting a process according to the communication mode of the control app. For example, the communication mode may have two modes: a multi-connection mode for communicating with multiple imaging devices  200 , and a single-connection mode for communicating with a single imaging device  200 . 
     When the communication mode is the multi-connection mode, the communication unit  102 , acting as an AP, stands by until there is a connection request from the imaging device  200 , and establishes a communication connection with the imaging device  200  only when a connection request is received. Additionally, a communication connection may be established with one or multiple imaging devices  200 . For this reason, the communication unit  102  may establish a communication connection with each of five imaging devices  200 , for example. 
     When the communication mode is the single-connection mode, the communication unit  102  transmits a communication connection to one imaging device  200 , and if a connection is allowed by the imaging device  200 , a communication connection with the imaging device  200  is established. For example, the communication unit  102  may use a short-range communication unit, which is separately provided in the control device  100 - 1  and which conducts short-range communication using near field communication (NFC) or the like, to conduct communication for the purpose of a communication connection by the communication unit  102 , and transmit a connection request after the communication unit  208  of the imaging device  200  is activated. Note that the communication unit  102  may also transmit a connection request to the imaging device  200  on the basis of some other event occurring, such as a connection instruction operation performed by the user with respect to the communication unit  102 , for example. 
     The controller  104  controls the overall operation of the control device  100 - 1 . Specifically, the controller  104  controls communication by the communication unit  102  and controls the display on the display unit  108 . More specifically, the controller  104 , on the basis of communication by the communication unit  102 , specifies respective images corresponding to multiple imaging devices  200 , and causes the display unit  108  to list the specified images. For example, the controller  104  provides the display unit  108  with respective images received from each of the multiple imaging devices  200  by the communication unit  102 , and the display unit  108  lists the respective images in accordance with a display mode. For example, the display mode may have two modes: a multi-view mode in which images corresponding to the imaging device  200  are listed, and a single-view mode in which one image from among respective images corresponding to the imaging device  200  is displayed individually. Note that the displayed content in each display mode will be later discussed in detail. 
     Furthermore, the controller  104  conducts operational control based on the occurrence of an event related to the imaging devices  200  while in the list display state. Specifically, the controller  104  conducts operational control based on a user operation performed while in the list display state with respect to each of the imaging devices  200  corresponding to each of the listed images. For example, the controller  104  controls the transmission of an operational instruction to the imaging devices  200  on the basis of the user operation. 
     The storage  106  stores images. Specifically, the storage  106  stores images which are acquired from the imaging device  200  and displayed on the display unit  108 . 
     The display unit  108  displays images on the basis of an instruction from the controller  104 . Specifically, the display unit  108  displays images received from the imaging device  200  by the communication unit  102  and images acquired from the storage  106 , in accordance with a display mode. For example, the display unit  108  may be a display device such as a liquid crystal display panel or an organic electroluminescence (EL) panel. 
     The operation detector  110  converts a user operation with respect to the control device  100 - 1  into input. Specifically, the operation detector  110  generates input information according to an operation by the user, and provides the generated input information to the controller  104 . For example, the operation detector  110  detects a user operation on a button-type or touchpad-type input device provided separately on the control device  100 - 1 , or on a touch panel-type input device integrated with the display unit  108 . 
     &lt;2-2. Device Processing&gt; 
     Next, processing by the control device  100 - 1  according to the present embodiment will be described. 
     (Overall Process Flow) 
     First, the overall processing by the control device  100 - 1  will be summarized with reference to  FIG.  3   .  FIG.  3    is a flowchart that conceptually illustrates a summary of overall processing by the control device  100 - 1  according to the present embodiment. 
     First, the control device  100 - 1  stands by until an application activation operation is performed (step S 302 ). Specifically, the controller  104  determines whether or not input information provided from the operation detector  110  indicates an activation operation of the control app. 
     When the application activation operation is performed, the control device  100 - 1  determines whether or not the communication mode is the multi-connection mode (step S 304 ). Specifically, when it is determined that the input information indicates an activation operation of the control app, the controller  104  determines whether or not a setting causing the communication configuration of the control device  100 - 1  to act as an AP, such as a tethering setting, for example, is turned on. 
     If the communication mode is determined to be the multi-connection mode, the control device  100 - 1  activates the application in multi-connection mode (step S 306 ). Specifically, when the tethering setting of the control device  100 - 1  is determined to be on, the controller  104  conducts a process of activating the control app in multi-connection mode. 
     Next, the control device  100 - 1  displays images received from the connected imaging device  200  (step S 308 ). Specifically, if an imaging device  200  is connected, the controller  104  causes the display unit  108  to display images received from that imaging device  200  by the communication unit  102 , in accordance with the display mode. 
     Next, the control device  100 - 1  stands by until a user operation is performed on a displayed image (step S 310 ). Specifically, the controller  104  determines whether or not input information provided from the operation detector  110  indicates a user operation on a displayed image. 
     If a user operation is performed on a displayed image, the control device  100 - 1  determines whether or not the display mode is multi-view mode (step S 312 ). Specifically, if the input information is determined to indicate an operational instruction operation for the imaging device, the controller  104  determines whether or not the display mode is multi-view mode. 
     If the display mode is determined to be multi-view mode, the control device  100 - 1  issues an operational instruction to each of the imaging devices  200  corresponding to the displayed images (step S 314 ). Specifically, when the display mode is determined to be multi-view mode, the controller  104  transmits an instruction for operation corresponding to the user operation via the communication unit  102  to each of the imaging devices  200  corresponding to each of the displayed images. 
     Meanwhile, if the display mode is determined not to be multi-view mode, or in other words determined to be single-view mode, the control device  100 - 1  transmits an operational instruction only to the imaging device  200  corresponding to the displayed image (step S 316 ). Specifically, when the display mode is determined to be single-view mode, the controller  104  transmits an instruction for operation corresponding to the user operation via the communication unit  102  only to the imaging device  200  corresponding to the image being displayed on the display unit  108 . 
     Next, the control device  100 - 1  determines whether or not an end operation has been performed (step S 318 ), and upon determining that an end operation has been performed, the process ends. 
     In step S 304 , if the communication mode is determined not to be multi-connection mode, or in other words determined to be single-connection mode, the control device  100 - 1  operates in single-connection mode (step S 320 ). Note that since the processing by the control device  100 - 1  in single-connection mode is substantially the same as the processing by a control device of the past, description will be omitted herein. 
     Next, each process by the control device  100 - 1  according to the present embodiment will be described in detail. Note that description will be reduced or omitted for processes that are substantially the same as the processes discussed above. 
     (Communication Mode Configuration Process) 
     First, a communication mode configuration process, which is conducted as a preliminary process to the processes described in the above overall processing flow, will be described with reference to  FIG.  4   .  FIG.  4    is a diagram for explaining a process of configuring a communication connection with the imaging device  200  by the control device  100 - 1  according to the present embodiment. 
     First, the control device  100 - 1  activates the control app in single-connection mode on the basis of a user operation, and makes a communication connection with the imaging device  200 . Specifically, when a control app activation operation is performed, and a setting causing the communication configuration of the control device  100 - 1  to act as an AP is not configured, the controller  104  activates the control app in single-connection mode. Subsequently, the controller  104  causes the communication unit  102  to make a communication connection with the imaging device  200 . Note that a communication connection with the imaging device  200  may also be made before activating the control app. 
     Next, the control device  100 - 1  launches a multi-connection settings screen on a displayed single-connection mode operating screen. Specifically, after the control app is activated, the controller  104  causes the display unit  108  to display a single-connection mode operating screen. Subsequently, if an operation to transition to the settings screen of the imaging device  200  is performed on the single-connection mode operating screen, the controller  104  causes the display unit  108  to display the settings screen of the imaging device  200 . Next, if an operation to transition to a multi-connection settings screen is performed on the settings screen of the imaging device  200 , the controller  104  causes the display unit  108  to display the multi-connection settings screen. 
     For example, the controller  104  causes the display unit  108  to display a single-connection mode operating screen like the one illustrated in the diagram to the left on the upper row in  FIG.  4    as a result of a screen transition caused by a user operation, or as a default screen after activation of the control app. Additionally, on the single-connection mode operating screen, if a tap operation is performed on a graphical user interface (GUI) element related to the settings of the imaging device  200  like the one illustrated to the left on the upper row in  FIG.  4   , such as the icon  20 , for example, the controller  104  causes the display unit  108  to display a settings screen  50  of the imaging device  200  like the one illustrated in the middle diagram on the upper row in  FIG.  4   . Next, on the settings screen  50  of the imaging device  200 , if an operation is performed to select multi-connection settings from a list of configuration operations as illustrated in the middle diagram on the upper row in  FIG.  4   , the controller  104  causes the display unit  108  to display a multi-connection settings screen  52  like the one illustrated in the diagram to the right on the upper row in  FIG.  4   . Note that the multi-connection settings screen  52  may display configuration information for a multi-connection already registered in advance, such as a Service Set Identifier (SSID) and an authentication method. 
     Next, the control device  100 - 1 , on the basis of a user operation on the multi-connection settings screen, configures settings related to a multi-connection with respect to the connected imaging devices  200 . Specifically, if an operation for configuring settings on the multi-connection settings screen is performed, and multi-connection settings already have been registered, the controller  104  causes the display unit  108  to display a confirmation screen regarding whether or not to register new settings. Subsequently, if an operation for registering new settings is performed on the confirmation screen, the controller  104  causes the display unit  108  to display an input screen for inputting multi-connection settings information. Next, if an operation confirming input on the input screen is performed, the controller  104  causes the display unit  108  to display a notification screen indicating the completion of multi-connection settings. In addition, the controller  104  also causes the storage  106  to store the configured settings input on the input screen. Note that for subsequent sessions, the configured settings stored in the storage  106  may be used when making a communication connection. 
     For example, on the multi-connection settings screen  52 , if a tap operation is performed on the “Configure” display as illustrated in the diagram to the right on the upper row in  FIG.  4   , and if multi-connection settings already have been registered, the controller  104  causes the display unit  108  to display a confirmation screen  54  regarding whether or not to register new settings like the one illustrated in the diagram to the left on the lower row in  FIG.  4   . Subsequently, if a tap operation is performed on the “Configure” displays on the confirmation screen  54 , the controller  104  causes the display unit  108  to display a multi-connection settings information input screen  56  like the one illustrated in the middle diagram on the lower row in  FIG.  4   . For example, the input screen  56  may display elements such as input forms for inputting an SSID and a password (PW), as well as a pull-down list for selecting an authentication method. Subsequently, if a tap operation is performed on the “Configure” display on the input screen  56 , the controller  104  causes the display unit  108  to display a notification screen  58  indicating the completion of multi-connection settings. 
     Next, the control device  100 - 1 , on the basis of a user operation, changes the communication mode to multi-connection mode, and activates the control app. For example, after changing to a setting causing the communication configuration of the control device  100 - 1  to act as an AP on the basis of an operating system (OS) configuration operation by the user, the controller  104  activates the control app on the basis of a control app activation operation subsequently performed by the user. 
     Note that the control device  100 - 1  may also change the communication mode after activating the control app. A process of changing the communication mode after activating the control app will be described with reference to  FIG.  5   .  FIG.  5    is a diagram for explaining a process of changing a communication mode on the control device  100 - 1  according to the present embodiment. 
     First, the control device  100 - 1  activates the control app in multi-connection mode, and launches a control app settings screen on the displayed screen. Specifically, when a control app activation operation is performed, and a setting causing the communication configuration of the control device  100 - 1  to act as an AP is configured, the controller  104  activates the control app in multi-connection mode. Subsequently, on the screen displayed in multi-connection mode, if an operation to transition to the control app settings screen is performed, the controller  104  causes the display unit  108  to display the control app settings screen. 
     For example, after the control app is activated in multi-connection mode, if a tap operation is performed on a control app settings icon  22  on a standby screen which indicates that the control device  100 - 1  is waiting for a connection from the imaging device  200  as illustrated in the diagram to the left in  FIG.  5   , the controller  104  causes the display unit  108  to display a control app settings screen like the one illustrated in the middle diagram in  FIG.  5   . 
     Next, the control device  100 - 1  conducts a change of communication mode on the control app settings screen. Specifically, if an operation selecting the configuration mode setting is performed on the control app settings screen, the controller  104  causes the display unit  108  to display a confirmation screen for changing the communication mode setting. If an operation indicating a change of the communication mode setting is performed on the confirmation screen, the controller  104  causes the display unit  108  to display a screen for setting the communication configuration of the control device  100 - 1 . 
     For example, on the control app settings screen, if a tap operation is performed on the “Communication mode” display as illustrated in the diagram in the middle of  FIG.  5   , the controller  104  causes the display unit  108  to display a confirmation screen  60  for changing the communication mode setting like the one illustrated in the diagram to the right in  FIG.  5   . For example, the confirmation screen  60  for changing the communication mode setting may display the current communication mode, a procedure for changing the setting, and the like. Subsequently, if a tap operation is performed on the “Go to settings screen” display on the confirmation screen  60 , the controller  104  causes the display unit  108  to display a screen for setting the communication configuration of the control device  100 - 1 . 
     (Application Activation Process) 
     Next, a process of activating the control app will be described with reference to  FIG.  6   .  FIG.  6    is a diagram illustrating screen transitions related to a process of activating the control app on the control device  100 - 1  according to the present embodiment. 
     If a control app activation operation is performed, the control device  100 - 1  controls the screen transition during activation of the control app according to the communication mode. Specifically, if a control app activation operation is performed, first, the controller  104  causes the display unit  108  to display a screen indicating that the control app is being activated. Next, if the communication mode is multi-connection mode, the controller  104  causes the display unit  108  to display a confirmation screen for changing the communication mode setting. Subsequently, if an operation for not changing the communication mode setting is performed on the confirmation screen, the controller  104  causes the display unit  108  to display a standby screen indicating that the control device  100 - 1  is waiting for a connection from the imaging device  200 . 
     For example, if a tap operation is performed on an icon like the one illustrated in the diagram to the left in  FIG.  6   , the controller  104  causes the display unit  108  to display a screen on which the icon of the control app is displayed, as illustrated in the diagram in the middle on the upper row in  FIG.  6   . Next, if the communication mode is multi-connection mode, the controller  104  causes the display unit  108  to display a confirmation screen  60  for changing the communication mode setting like the one illustrated on the lower row in  FIG.  6   . Subsequently, if a tap operation is performed on the “Go to settings screen” display on the confirmation screen  60 , the controller  104  causes the display unit  108  to display a standby screen indicating that the control device  100 - 1  is waiting for a connection from the imaging device  200  as illustrated in the diagram to the right on the upper row in  FIG.  6   . For example, the standby screen may display a communication mode icon  26  indicating multi-connection mode. 
     (Connection Process of Imaging Device) 
     Next, a process conducted when the imaging device  200  is connected after the control app is activated will be described with reference to  FIGS.  7  and  8   .  FIG.  7    is a diagram for explaining an operation of configuring a communication mode on the imaging device  200  according to the present embodiment, while  FIG.  8    is a diagram for explaining a connection process of the imaging device  200  on the control device  100 - 1  according to the present embodiment. 
     First, the imaging device  200  changes the communication mode to multi-connection mode on the basis of a user operation. Specifically, if an operation for changing the communication mode setting is performed, the controller  204  changes the communication mode of the imaging device  200  to the mode indicated by the operation for changing the setting. Additionally, if the changed communicated mode is multi-connection mode, the controller  204  causes the communication unit  208  to connect to the control device  100 - 1 . 
     For example, if the settings of the imaging device  200  are selected, the controller  204  causes a message indicating that the settings of the imaging device  200  have been selected to be displayed on a display unit separately provided in the imaging device  200 , as illustrated in the top diagram in  FIG.  7   . If a communication connection setting is additionally selected, the controller  204  causes the communication method to be displayed on the display unit, as illustrated in the upper-middle diagram in  FIG.  7   . Next, if communication mode is selected, the controller  204  causes the display unit to display the selected communication mode, as illustrated in the lower-middle diagram in  FIG.  7   . Note that if a connection with the control device  100 - 1  is being attempted or if a connection has been made, the controller  204  may emphasize the display of the communication mode displayed on the display unit, such as with a blinking display, for example. 
     Meanwhile, the control device  100 - 1  stands by until the imaging device  200  is connected. Specifically, when no imaging devices  200  are connected, the controller  104  causes the display of a screen indicating that the control device  100 - 1  is waiting for a connection from the imaging device  200 . 
     Subsequently, if the imaging device  200  is connected, the control device  100 - 1  displays a screen corresponding to the connected imaging device  200 . Specifically, if the imaging device  200  is connected, the controller  104  causes the display  108  to display a list screen displaying a list of connected imaging devices  200 . In addition, after the connection process of the imaging device  200  is completed, the controller  104  causes the display  108  to display an operating screen for the imaging device  200 . 
     For example, when the imaging device  200  is connected, the controller  104  causes the display  108  to display a list screen on which respective information indicating connected imaging devices  200  is arranged vertically and displayed, as illustrated in the middle diagram in  FIG.  8   . Furthermore, when a connecting imaging device  200  exists, the controller  104  overlays onto the list screen a screen  62  indicating that the imaging device  200  is currently conducting the connection process, as illustrated in the middle diagram in  FIG.  8   . Subsequently, after the connection process of the imaging device  200  is completed, the controller  104  causes the display  108  to display a single-view screen on which is displayed an image corresponding to the imaging device  200  that was connected first, for example. 
     Note that instead of the imaging device  200  that was connected first, the controller  104  may also select an imaging device  200  specified on the basis of information related to the imaging device  200 , such as the type, attributes, connection count, or connection time of the imaging device  200 , for example. Also, when multiple imaging devices  200  are connected, or when multiple imaging devices  200  have already been connected, a multi-view screen may be displayed on the display  108  instead of a single-view screen. 
     Next, screens displayed by the control device  100 - 1  will be described with reference to  FIGS.  9  to  11   . The display screens include a list screen on which a list of connected imaging devices  200  are displayed, and operating screens for operating connected imaging devices  200 . The operating screens include a multi-view screen and a single-view screen corresponding to the display mode.  FIG.  9    is a diagram illustrating an example of an imaging device  200  list screen displayed on the control device  100 - 1  according to the present embodiment. Also,  FIG.  10    is a diagram illustrating an example of a single-view screen displayed on the control device  100 - 1  according to the present embodiment, and  FIG.  11    is a diagram illustrating an example of a multi-view screen displayed on the control device  100 - 1  according to the present embodiment. 
     (Imaging Device List Screen) 
     On the imaging device  200  list screen, information indicating connected imaging devices  200  is displayed in list format. The information indicating a connected imaging devices  200  is referred to in the appended claims as an “identifier”. Additionally, as the information indicating the imaging devices  200  (“identifiers”), an image indicating the type of imaging device  200  and information for identifying each imaging device  200  are displayed. For example, on the imaging device  200  list screen, as illustrated in  FIG.  9   , respective information indicating each of multiple connected imaging devices  200  (“identifiers”) is arranged on individual lines and displayed. Note that the information indicating the imaging devices  200  may be sorted by order of connection. Furthermore, as the information indicating the imaging devices  200  (“identifiers”), a type icon  28  indicating the type of imaging device  200  and a character string indicating a name of the imaging device  200 , such as a friendly name, for example, are displayed adjacent to each other. Note that the information indicating the imaging devices  200  (“identifiers”) may also include an identification number discussed later. In addition, also displayed on the list screen are an image related to an operation for transitioning to the control app settings screen, such as the control app settings icon  22 , for example, and an image indicating the currently configured communication mode, such as the communication mode icon  26 , for example. 
     Note that the information related to the type and name of the imaging devices  200  may be acquired via communication from the connected imaging devices  200 . Also, the types of imaging device  200  may be, for example, a compact digital camera, a single-lens reflex camera (A-mount), a single-lens reflex camera (E-mount), a Handycam, a lens-style camera, and a snap camera. Also, the information indicating an imaging device  200  (“identifiers”) may also be displayed in multiple columns and/or multiple rows. Also, the information indicating an imaging device  200  (“identifiers”) may also include an image acquired from the imaging device  200 . For example, a reduced-scale image may be arranged and displayed beside the other information. In addition, any combination of the above-described information indicating an imaging device  200  (“identifiers”) may be included in the displayed list screen. Thus, for example, the identifiers in the list may include, among others: a symbol corresponding to the imaging device  200  (e.g., type icon  28 ), a name of the imaging device  200 , a number corresponding to the imaging device  200  (e.g., an identification number), an image corresponding to the imaging device  200  (e.g., a reduced scale image acquired by the imaging device), or any combination of these. 
     (Single-View Screen) 
     On the single-view screen, information about one imaging device  200  from among multiple connected imaging devices  200  is displayed. Specifically, on the single-view screen, an image corresponding to the imaging device  200  and an image indicating the status of the imaging device  200  are displayed. For example, on the single-view screen, as illustrated in  FIG.  10   , an image  30  acquired from the imaging device  200  and a shooting mode icon  32  indicating the shooting mode of the imaging device  200  are displayed. For example, the image  30  may be an image obtained by imaging of the imaging device  200  and received from the imaging device  200  at a designated time interval, such as an electric eye (EE) image, for example. 
     Also displayed on the single-view screen is an image indicating the imaging device  200  from among the multiple connected imaging devices  200  from which an image is being displayed. Specifically, on the single-view screen, a number assigned to each imaging device  200  in order of connection (hereinafter also called the identification number) is displayed. Note that instead of numerals, the identification number may also be other characters or signs having an order, such as Japanese kana characters or letters of the alphabet. For example, on the single-view screen, as illustrated in  FIG.  10   , the identification number “1” assigned to the imaging device  200  is displayed adjacent to the shooting mode icon  32 . Note that the number of connected imaging devices  200  is displayed adjacent to the identification number. For example, the display “⅕” as illustrated in  FIG.  10    indicates that there are five connected imaging devices  200 , and “1” is the identification number of the imaging device  200  corresponding to the displayed image. 
     Also, on the single-view screen, images related to operating the imaging device  200  are displayed. For example, on the single-view screen, as illustrated in  FIG.  10   , an icon  20  related to the settings of the imaging device  200 , a shooting mode setting icon  34  related to the shooting mode setting, and a recording operation icon  36  related to an operation for instructing the imaging device  200  to record are displayed. 
     Note that all or part of the information indicating the imaging device  200  may also be displayed on the single-view screen. For example, the friendly name of the imaging device  200  corresponding to the image displayed on the single-view screen may also be displayed. 
     (Multi-View Screen) 
     On the multi-view screen, information about each connected imaging device  200  is displayed. Specifically, on the multi-view screen, images corresponding to each of the connected imaging devices  200  are displayed. Furthermore, the controller  104  causes the display  108  to display, in association with each of the images, objects indicating the correspondence relationship between each of the listed images and each of the imaging devices  200 . Specifically, the controller  104  causes the display  108  to display information indicating each of the imaging devices  200  and images indicating the status of each of the imaging devices  200 . 
     For example, on the multi-view screen, as illustrated in  FIG.  11   , for each connected imaging device  200 , an image  30  acquired from the imaging device  200 , information indicating the imaging device  200 , and the shooting mode icon  32  of the imaging device  200  are collected as a single set (hereinafter also called a display set), and these display sets are arranged and displayed. Herein, there exist many variations in the display format of the display sets, such as the size, number, and arrangement, for example. Accordingly, the display format of the display sets will be described with reference to  FIGS.  12 A to  15 B .  FIGS.  12 A to  15 B  are diagrams that each illustrate an example of the display format of display sets on the control device  100 - 1  according to the present embodiment. Note that  FIGS.  12 A to  15 B  illustrate examples that partially differ from the compositional layout of display sets discussed above. For example, elements such as the identification number and friendly name may be arranged below the image  30 . 
     The controller  104  decides the display area of the display sets on the basis of the number of display sets to display. Specifically, the controller  104  decides the number of display sets to display on the basis of factors such as the number of connected imaging devices  200  or display set display configuration information, and decides the display area of the display sets on the basis of the decided number to display, as well as the available area in which to display the display sets and the orientation of the screen. 
     For example, when the number of display sets to display is one or two, the controller  104  decides, as the display area for one display set, a rectangle whose length on one edge is half the length in the long-edge direction of the display area  40  of the multi-view screen, and whose length on an edge orthogonal to the one edge is half the length in the short-edge direction of the display area  40  of the multi-view screen, as illustrated in  FIG.  12 A . Also, the controller  104  specifies the screen orientation, and when the specified screen orientation is a reference direction of the screen, such as the horizontal direction, for example, decides the placement of the display areas so that two of the display areas are lined up in the horizontal direction. Subsequently, the display  108  displays the display sets in the assigned display areas. Note that the placement of display sets may be conducted by following the order indicated by the identification numbers, or conducted randomly. 
     Note that in  FIG.  12 B , the aspect ratio of the screen is different from the screen illustrated in  FIG.  12 A . For example, whereas the screen in  FIG.  12 A  has an aspect ratio of 3:2, the screen in  FIG.  12 B  has an aspect ratio of 16:9. For this reason, the aspect ratio of the display area for each of the display sets is also different. 
     Also, in  FIG.  12 C , the orientation of the screen is different from the screens illustrated in  FIGS.  12 A and  12 B . For example, in  FIG.  12 C , the reference direction of the screen is the vertical direction. For this reason, the display areas of the display sets are arranged in the vertical direction. At this point, if there is free space in the horizontal direction of the display areas of the display sets, the display areas of the display sets may also be extended in the horizontal direction. For example, the display areas of the display sets may be extended to an aspect ratio of 16:9. 
     Next, an example in which the number of display sets to display is three or four will be described with reference to  FIGS.  13 A to  13 C . For example, when the number of display sets to display is three or four, the controller  104  conducts a process similar to the case of displaying two display sets, and thereby decides, as the display area for one display set, a rectangle obtained by dividing the display area  40  of the multi-view screen into four sections, as illustrated in  FIGS.  13 A to  13 C . 
     Next, an example in which the number of display sets to display is five or six will be described with reference to  FIGS.  14 A to  14 C . For example, when the number of display sets to display is five or six, the controller  104  conducts a process similar to the case of displaying one to four display sets, and thereby decides, as the display area for one display set, a rectangle obtained by dividing the display area  40  of the multi-view screen into six sections, as illustrated in  FIGS.  14 A to  14 C . 
     Note that when the number of display sets to be displayed is less than the decided number to display, a display area of a display set in which a display set is not displayed may also exist. For example, when the number to display is six, but the number of display sets to be displayed is five (for example, there are five connected imaging devices  200 ), a display set is not displayed in one of the six display areas of display sets, as illustrated in  FIG.  14 B . Note that the number of display sets that are not displayed may also be two or more. 
     Next, an example in which the number of display sets to display is 7 to 9 and 10 to 12 will be described with reference to  FIGS.  15 A and  15 B . For example, when the number of display sets to display is 7 to 9, the controller  104  conducts a process similar to the case of displaying one to six display sets, and thereby decides, as the display area for one display set, a rectangle obtained by dividing the display area  40  of the multi-view screen into 9 sections, as illustrated in  FIG.  15 A . Also, when the number of display sets to display is 10 to 12, the controller  104  decides, as the display area for one display set, a rectangle obtained by dividing the display area  40  of the multi-view screen into 12 sections, as illustrated in  FIG.  15 B . 
     Note that not all display sets related to all connected imaging devices  200  may be displayed. For example, when there are five connected imaging devices  200 , the controller  104  selects the display format that divides the multi-view screen into four sections as illustrated in  FIGS.  13 A to  13 C , and selects four out of the five connected imaging devices  200 , on the basis of a user operation. Subsequently, the controller  104  causes the display  108  to display the display sets related to the selected imaging devices  200 . 
     Note that although the above description of the multi-view screen describes an example in which the image corresponding to an imaging device  200  is the image  30  received from an imaging device  200  at a designated time interval, when an image is not received from an imaging device  200 , the controller  104  may also cause the display  108  to display an image indicating that an image has not been received or is being received, instead of the image  30 . For example, when the image  30  is not received from an imaging device  200 , the controller  104  may acquire from the storage  106  an image  38  indicating that an image is being acquired, as illustrated in  FIG.  11   , and cause the display  108  to display the acquired image  38 . Note that when an image is later received from the imaging device  200 , the controller  104  switches the displayed image from the image  38  to the received image  30 . 
     Also, on the multi-view screen, images related to operating the imaging device  200  are displayed. For example, on the multi-view screen, as illustrated in  FIG.  11   , the shooting mode setting icon  34  and a recording operation icon  36  related to an operation for instructing the imaging device  200  to record are displayed. 
     (Process of Switching Display Screen) 
     Next, a process of switching the screen displayed by the control device  100 - 1  will be described with reference to  FIGS.  16  and  17   .  FIG.  16    is a diagram illustrating an example of a process of switching the single-view screen by going through the multi-view screen on the control device  100 - 1  according to the present embodiment, while  FIG.  17    is a diagram illustrating an example of a process of switching the single-view screen by going through the imaging device  200  list screen on the control device  100 - 1  according to the present embodiment. 
     First, a process of switching the single-view screen by going through the multi-view screen will be described with reference to  FIG.  16   . 
     If an operation for transitioning to the multi-view screen is performed on the single-view screen, the controller  104  causes the display  108  to transition the display screen from the single-view screen to the multi-view screen. For example, on the single-view screen, if a tap operation is performed on the identification number and the number of connected imaging devices  200  displayed adjacent to the shooting mode icon  32  as illustrated in the diagram to the left in  FIG.  16   , the controller  104  causes the display  108  to display a multi-view screen like the one illustrated in the middle-left diagram in  FIG.  16   . 
     Next, if an operation selecting one of the display sets displayed on the multi-view screen is performed, the controller  104  causes the display  108  to transition the display screen from the multi-view screen to a single-view screen for the imaging device  200  corresponding to the selected display set. For example, on the multi-view screen, if a tap operation is performed on one of the multiple display sets being displayed, such as the display set with the identification number  2 , for example, the controller  104  causes the display  108  to display a single-view screen for the imaging device  200  having the identification number  2 , as illustrated in the diagram to the right in  FIG.  16   . Note that during the time after the tap operation is performed and before the screen transitions to the single-view screen, the controller  104  causes the display  108  to display an image  64  indicating that a screen transition is being processed. 
     Next, a process of switching the single-view screen by going through the imaging device  200  list screen will be described with reference to  FIG.  17   . 
     When an operation for transitioning to the imaging device  200  list screen is performed on the single-view screen, the controller  104  causes the display  108  to transition the display screen from the single-view screen to the imaging device  200  list screen. For example, on the single-view screen, if a tap operation is performed on the Back operation icon  42  for giving an instruction to go back a screen as illustrated in the diagram to the left in  FIG.  17   , the controller  104  causes the display  108  to display an imaging device  200  list screen like the one illustrated in the middle-left diagram in  FIG.  17   . 
     Next, if an operation selecting one of the pieces of information indicating an imaging device  200  displayed on the imaging device  200  list screen is performed, the controller  104  causes the display  108  to transition the display screen from the imaging device  200  list screen to a single-view screen for the imaging device  200  corresponding to the selected information indicating an imaging device  200 . For example, on the imaging device  200  list screen, if a tap operation is performed on one of the multiple pieces of information indicating an imaging device  200  being displayed, such as the second piece of information from the top, for example, the controller  104  causes the display  108  to display a single-view screen for the imaging device  200  corresponding to the tapped information, as illustrated in the diagram to the right in  FIG.  17   . Note that during the time after the tap operation is performed and before the screen transitions to the single-view screen, the controller  104  causes the display  108  to display an image  64  indicating that a screen transition is being processed. 
     Note that a screen transition may also be conducted between the imaging device  200  list screen and the multi-view screen. For example, similarly to the single-view screen, if a tap operation is performed on the Back operation icon  42  on the multi-view screen, the controller  104  causes the display  108  to display the imaging device  200  list screen. Also, on the imaging device  200  list screen, an icon for giving an instruction to transition to the multi-view screen is additionally placed, and if a tap operation is performed on the icon, the controller  104  causes the display  108  to display the multi-view screen. 
     (Shooting Process) 
     Next, the control of the transmission of an operational instruction to the imaging device  200  based on a user operation by the control device  100 - 1  will be described with reference to  FIGS.  18  and  19   . For example, the controller  104  transmits an image recording instruction, or in other words a shooting instruction, to the imaging device  200  on the basis of a user operation.  FIG.  18    is a diagram for explaining a shooting process on the single-view screen displayed by the control device  100 - 1  according to the present embodiment, and  FIG.  19    is a diagram for explaining a shooting process on the multi-view screen displayed by the control device  100 - 1  according to the present embodiment. 
     First, a shooting process on the single-view screen will be described with reference to  FIG.  18   . 
     If an operation for image recording is performed on the single-view screen, the controller  104  transmits an instruction related to image recording only to the imaging device  200  corresponding to the image being displayed. For example, on the single-view screen, if a tap operation is performed on the recording operation icon  36 , the controller  104  transmits an instruction related to image recording via communication only to the imaging device  200 A corresponding to the image being displayed on the single-view screen from among the connected imaging devices  200 A to  200 D, as illustrated in  FIG.  18   . For example, the instruction related to image recording may be an instruction to start or stop recording a moving image, or to record a still image. Note that in  FIG.  18   , the short-dashed lines indicate that the control device  100 - 1  and the imaging devices  200  are connected, while the long-dashed line indicates an operational instruction communicated from the control device  100 - 1  to an imaging device  200 . 
     Next, a shooting process on the multi-view screen will be described with reference to  FIG.  19   . 
     If an operation for image recording is performed on the multi-view screen, the controller  104  transmits an instruction related to image recording to each of the imaging devices  200  corresponding to the display sets being displayed. For example, on the multi-view screen, if a tap operation is performed on the recording operation icon  36 , the controller  104  transmits an instruction related to image recording via communication to each of the imaging devices  200 A to  200 D corresponding to the display sets being displayed on the multi-view screen from among the connected imaging devices  200 A to  200 D, as illustrated in  FIG.  19   . The controller  104  may also transmit operational instructions to all connected imaging devices  200 . 
     Also, the controller  104  may cause the display  108  to display an indication that the imaging devices  200  are in a recording state. Specifically, the controller  104  adds an object indicating a recording state to the display sets corresponding to the imaging devices  200  in a recording state. For example, when an imaging device  200  starts image recording in accordance with an image recording start instruction, the imaging device  200  transmits information such as the status of the imaging device  200  or an indication that image recording has started to the control device  100 - 1 . The controller  104  receives this information, and causes the display  108  to display an icon  44  indicating recording in the display set corresponding to the imaging device  200  that transmitted the information, such as overlaid onto the shooting mode icon  32 , for example. Alternatively, a shooting mode icon  32  indicating recording may be displayed. 
     Note that the controller  104  may also transmit an operational instruction only to some of the imaging devices  200  corresponding to the display sets displayed on the multi-view screen. For example, the controller  104  may transmit an operational instruction, or in other words an instruction related to image recording, only to the imaging device  200  corresponding to a selected display set on the multi-view screen. 
     Furthermore, the controller  104  decides the content of the operational instruction on the basis of the operational state of each of the imaging devices  200  corresponding to the displayed display sets. Specifically, the controller  104  decides an instruction related to image recording for each of the imaging devices  200  on the basis of an image recording state for each of the imaging devices  200 . Furthermore, a process of deciding the content of such an operational instruction will be described in detail with reference to  FIG.  20   .  FIG.  20    is a diagram for explaining a process of deciding the content of an instruction related to image recording to the imaging device  200  on the control device  100 - 1  according to the present embodiment. 
     If an operation for image recording is performed on the multi-view screen, the controller  104  determines which predetermined state corresponds to the operational states related to recording of each of the imaging devices  200  corresponding to the display sets being displayed. For example, on the multi-view screen, if a tap operation is performed on the recording operation icon  36 , the controller  104  acquires, from each of the imaging devices  200  via communication, the image recording state of each of the imaging devices  200  corresponding to the display sets being displayed. Subsequently, the controller  104  determines which designated state corresponds to the acquired image recording states, such as a state in which all imaging devices  200  have stopped recorded, a state in which multiple imaging devices  200  are executing recording, and a state in which all imaging devices  200  are executing recording, as illustrated in the left column of the table T 1  in  FIG.  20   , for example. Note that the image recording states of the imaging devices  200  may also be acquired via communication in advance and stored in the storage  106 . In this case, the controller  104  acquires the image recording states from the storage  106 . 
     The controller  104  decides the content of the operational instruction on the basis of the determined states and the shooting mode of the imaging devices  200 . Specifically, for each of the imaging devices  200  to which to transmit an instruction related to image recording, the controller  104  decides the content with which to instruct each imaging device  200  on the basis of the shooting mode and the determined state for each. For example, if the shooting mode is a moving-image type of shooting mode for a certain imaging device  200 , for example, the controller  104  selects from among instruction content as illustrated in the middle column of the table T 1  illustrated in  FIG.  20   . Also, if the shooting mode is a still-image type of mode, the controller  104  selects from among instruction content as illustrated in the right column of the table T 1  illustrated in  FIG.  20   . The controller  104  conducts the above selection process for each of the imaging devices  200  to be given an operational instruction, and transmits an instruction related to image recording to each imaging device  200  in accordance with the selected instruction content. 
     In this way, according to the first embodiment of the present disclosure, the control device  100 - 1  is connected to multiple imaging devices  200  via wireless communication, and communicates with each of the multiple imaging devices  200 . Additionally, the control device  100 - 1  specifies each of the images corresponding to each of the multiple imaging devices  200  on the basis of the communication, and lists the specified images. For this reason, dynamic connections are enabled between the control device  100 - 1  and each of the multiple imaging devices  200 , and each of the images acquired from each of the multiple imaging devices  200  is perceivably displayed at a glance. Consequently, it is possible for the user to easily perceive the images corresponding to each of the multiple connected imaging devices  200 , while also retaining flexibility in the format of communication with the imaging devices  200 . 
     Also, the control device  100 - 1  additionally conducts operational control with respect to imaging devices  200  corresponding to the listed images, on the basis of the occurrence of an event related to the imaging devices  200  in the list display state. For this reason, by conducting operational control related to imaging devices  200  perceived in a list by the user, the user more easily perceives the imaging devices  200  whose operation is to be controlled, making it possible to improve usability. 
     In addition, the above event includes user operations directed at the imaging devices  200 , and the control device  100 - 1  conducts operational control based on a user operation performed while in the list display state for each of the imaging devices  200  corresponding to each of the listed images. For this reason, the user does not have to perform operations individually on each of the imaging devices  200  to be operated, thereby reducing the user workload, and making it possible to improve usability. 
     Also, the above operational control based on a user operation includes control of an operational instruction transmitted to the imaging devices  200 . For this reason, the transmission of an operational instruction to the imaging devices  200  is controlled all at once, making it possible to reduce the possibility of inconsistent operational timings or the like of the imaging devices  200 . 
     In addition, the above operational instruction includes an instruction related to image recording with respect to the imaging devices  200 , and the control device  100 - 1  decides the instruction content on the basis of the operational state of each of the imaging devices  200  corresponding to the displayed images. For this reason, by aligning the operation of each of the imaging devices  200 , it becomes possible to realize control of a group of imaging devices  200  according to the user&#39;s intentions. 
     In addition, the control device  100 - 1  displays, in association with each of the images, objects indicating the correspondence relationship between each of the listed images and each of the imaging devices  200 . In this way, by displaying an identification number and a friendly name or the like in correspondence with an EE image, for example, the user more easily recognizes the imaging device  200  corresponding to the EE image, making it possible to minimize operating mistakes caused by the user mistaking the correspondence relationship between an imaging device  200  and an EE image. 
     In addition, the control device  100 - 1  individually displays one from among the images, and switches the display between the list display of the images and the individual display. For this reason, when the user wants to focus only on one imaging device  200  among the imaging devices  200  corresponding to each of the listed images, the display may be switched to an individual display of the relevant imaging device  200 , thereby making it possible to improve usability. 
     In addition, the control device  100 - 1  conducts operational control based on a user operation directed at an imaging device  200  in the individual display state, only for the imaging device  200  corresponding to the individually displayed image. For this reason, operational control is conducted only for the imaging device  200  that the user wants to operate, thereby making it possible to improve usability further. 
     &lt;2-3. Modifications&gt; 
     The foregoing thus describes a first embodiment of the present disclosure. However, the present embodiment is not limited to the foregoing example. Hereinafter, first to third modifications of the present embodiment will be described. 
     (First Modification) 
     As a first modification of the present embodiment, the control device  100 - 1  may also notify the user of an operational result of the imaging device  200  conducted on the basis of an instruction related to image recording. Specifically, the communication unit  102  receives an image obtained by a recording operation of the imaging device  200  conducted on the basis of an instruction related to image recording, and the controller  104  causes the display  108  to display the received image. 
     For example, on the basis of an instruction by the controller  104 , the communication unit  102  transmits a recording instruction to an imaging device  200  whose shooting mode is still image mode, and receives an image obtained by the imaging of that imaging device  200 . The controller  104  causes the display  108  to display the received image as a confirmation display, or in other words, a preview. Furthermore, the controller  104  causes the display  108  to display an image prompting the user to select whether or not to save the image, and if an operation selecting to save is performed, causes the storage  106  to store the image. 
     Furthermore, the controller  104  may also determine whether or not to present a preview on the basis of configuration information related to image preview and saving. Configuration information for preview will be described in detail with reference to  FIG.  21   .  FIG.  21    is a diagram illustrating an example of configuration information for image preview and saving according to a first modification of the present embodiment. 
     First, when an image is received from the imaging device  200 , the controller  104  acquires configuration information for preview and saving. For example, configuration information indicating whether or not to conduct preview and saving is stored in the storage  106 , and when an image is received from the imaging device  200 , the controller  104  acquires the configuration information from the storage  106 . 
     Next, the controller  104  determines whether or not to preview the received image, on the basis of the shooting mode of the imaging device  200  and the acquired configuration information. For example, the controller  104  decides whether or not to present a preview (display) according to whether the configuration information for preview (display) and saving is on or off, and whether the shooting mode is still image (normal) or still image (continuous), as illustrated by the table T 2  in  FIG.  21   . For example, when the shooting mode is still image (normal), the controller  104  presents a preview if the preview (display) setting is on, and when the shooting image is still image (continuous), the controller  104  presents a preview if the preview (display) or saving setting is on. This is because when the shooting mode is still image (continuous), multiple received images exist, and thus the user is made to select which of the multiple images to save, or select to save all. Note that the controller  104  may also change the determination result according to whether the screen is the single-view screen or the multi-view screen. Specifically, for the single-view screen, the controller  104  makes a determination as above, and for the multi-view screen, the controller  104  does not preview the image received from the imaging device  200 . For example, the controller  104  ordinarily does not present a preview (display) on the multi-view screen, irrespective of the content of the configuration information for preview (display) and saving or the shooting mode, as illustrated by the table T 2  in  FIG.  21   . 
     In this way, according to the first modification of the present embodiment, the control device  100 - 1  presents a confirmation display to the user for an image obtained by a recording operation of the imaging device  200  based on an instruction related to image recording. 
     In addition, in the list display state, the control device  100 - 1  does not present a confirmation display to the user for the result of recording by the imaging device  200  conducted on the basis of an instruction related to image recording. At this point, in some cases images may be received as recording results from multiple imaging devices  200  in response to an instruction related to image recording on the multi-view screen, and thus if a preview is presented for each of the received images, the display screen may become complicated. However, according to the process of the present modification, a preview is not prevented on the multi-view screen, thereby making it possible to minimize decreases in the visibility of the display screen. 
     Note that although the above describes an example in which a preview is presented when the shooting mode is a mode related to still images, but a preview may also be presented when the shooting mode is a mode related to moving images. 
     Additionally, when images related to recording are received from multiple imaging devices  200  on the multi-view screen, the controller  104  may also treat each of the multiple imaging devices  200  as one group, and cause the storage  106  to save each of the received images in units of groups. For example, if images are received from multiple imaging devices  200 , the controller  104  treats each of the imaging devices  200  as one group, and causes the storage  106  to store the received images so that each of the received images is saved in a common directory or the like, for example. In this case, organization of the images received from contemporaneously connected imaging devices  200  becomes easy, making it possible to improve usability. 
     (Second Modification) 
     As a second modification of the present embodiment, the control device  100 - 1  may also transmit another operational instruction different from an instruction related to image recording, such as an instruction related to the settings of the imaging device  200 , for example. Specifically, the control device  100 - 1  transmits a settings-related instruction to the imaging device  200  on the basis of a user operation conducted in the individual display state or the list display state. First, an operation of transmitting a settings instruction to the imaging device  200  while in the individual display state will be described with reference to  FIG.  22   .  FIG.  22    is a diagram for explaining an example of an operation of transmitting a settings instruction to the imaging device  200  on the single-view screen of the control device  100 - 1  according to a second modification of the present embodiment. 
     If an operation related to the settings of the imaging device  200  is performed on the single-view screen, the control device  100 - 1  transmits a settings-related instruction only to the imaging device  200  corresponding to the displayed image. For example, on the single-view screen, if a tap operation is performed on the icon  20  related to the settings of the imaging device  200  or the shooting mode setting icon  34 , the controller  104  causes the display  108  to display a shooting mode selection screen  66 , as illustrated in  FIG.  22   . Subsequently, if a shooting mode is selected on the shooting mode selection screen  66 , the controller  104  transmits an instruction related to the shooting mode setting via communication only to the imaging device  200 A corresponding to the image being displayed on the screen from among the connected imaging devices  200 A to  200 D, as illustrated in  FIG.  22   . 
     Next, an operation of transmitting a settings instruction to the imaging device  200  while in the list display state will be described with reference to  FIG.  23   .  FIG.  23    is a diagram for explaining an example of an operation of transmitting a settings instruction to the imaging device  200  on the multi-view screen of the control device  100 - 1  according to the second modification of the present embodiment. 
     If an operation related to the settings of the imaging device  200  is performed on the multi-view screen, the control device  100 - 1  transmits a settings-related instruction to each of the imaging devices  200  corresponding to each of the displayed images. For example, on the multi-view screen, if a tap operation is performed on the shooting mode setting icon  34 , the controller  104  causes the display  108  to display the shooting mode selection screen  66 , as illustrated in  FIG.  23   . Subsequently, if a shooting mode is selected on the shooting mode selection screen  66 , the controller  104  transmits an instruction related to the shooting mode setting via communication to each of the imaging devices  200 A to  200 D corresponding to the display sets being displayed on the multi-view screen from among the connected imaging devices  200 A to  200 D. 
     At this point, the controller  104  decides the instruction content on the basis of settings shared in common among the imaging devices  200  corresponding to the displayed images. For example, the controller  104  picks out selectable shooting modes shared in common among the imaging devices  200 A to  200 D corresponding to the displayed display sets, and causes the relevant shooting modes to be displayed on the shooting mode selection screen  66 . Subsequently, the controller  104  transmits an instruction via communication to each of the imaging devices  200  so as to change the shooting mode to the shooting mode selected by the user on the shooting mode selection screen  66 . 
     Note that although the above describes an example in which the content of the setting to transmit to the imaging devices  200  on the multi-view screen is a shooting mode setting, the content of the setting to transmit to the imaging devices  200  may also be another setting, such as a communication mode setting. 
     In this way, according to the second modification of the present embodiment, the control device  100 - 1  transmits a settings-related instruction to the imaging device  200  on the basis of a user operation conducted in the individual display state or the list display state. 
     Also, if an operation related to the settings of the imaging device  200  is performed on the multi-view screen, the control device  100 - 1  transmits a settings-related instruction to each of the imaging devices  200  corresponding to each of the displayed images. For this reason, individual operations on each of the imaging devices  200  may be omitted, making it possible to improve usability. 
     Also, the control device  100 - 1  decides the instruction content on the basis of settings shared in common among the imaging devices  200  corresponding to the displayed images. For this reason, by not transmitting a settings-related instruction to an imaging device  200  that does not support the selected setting, it becomes possible to minimize errors on the relevant imaging device  200  and also to minimize the user mistakenly thinking that the relevant setting is available on the relevant imaging device. 
     (Third Modification) 
     As a third modification of the present embodiment, the control device  100 - 1  may also notify the user when an operation that is not supported in the currently set communication mode is performed. Specifically, when the communication mode is multi-connection mode, and an operation that is not supported in multi-connection mode is performed, the controller  104  causes the display  108  to display an image notifying the user that the operation is unsupported. Furthermore, a process will be described for the case in which an operation that is not supported in the currently set communication mode is performed, with reference to  FIGS.  24 A to  24 D . FIGS.  24 A to  24 D are each a diagram for explaining an example of a display indicating that a performed operation is unsupported on the control device  100 - 1  according to the third modification of the present embodiment. 
     For example, in multi-connection mode, if an operation for making a single connection is performed, such as a touch operation on the control device  100 - 1  with respect to an imaging device  200  in conjunction with NFC communication, for example, the controller  104  causes the display  108  to display an image notifying the user that the current communication mode is multi-connection mode. The display  108  displays an image  68  as illustrated in  FIGS.  24 A to  24 D , for example. Note that although  FIGS.  24 A to  24 D  illustrate examples in which the same image  68  is displayed on each display screen, different screens may be displayed for each. In addition, the image  68  may also be an image that disappears after a designated time elapses, such as a Toast image, for example. 
     In this way, according to the third modification of the present embodiment, the user may be notified when an operation that is not supported in the currently set communication mode is performed. For this reason, the user does not repeatedly perform an unsupported operation without knowing that the operation is not supported in the currently set communication mode, making it possible to improve usability. 
     3. SECOND EMBODIMENT (OPERATIONAL CONTROL BASED ON STATUS CHANGE IN IMAGING DEVICE) 
     The foregoing thus described a control device  100 - 1  according to the first embodiment of the present disclosure. Next, a control device  100 - 2  according to a second embodiment of the present disclosure will be described. The control device  100 - 2  controls, on the basis of a status change of each of the imaging devices  200  corresponding to each of the listed images, a display indicating the status changes. 
     &lt;3-1. Device Configuration&gt; 
     The configuration of the control device  100 - 2  according to the second embodiment of the present disclosure is substantially the same as the configuration according to the first embodiment, but the function of the controller  104  is partially different. Note that description will be reduced or omitted for functions which are substantially the same as the first embodiment. 
     (Functional Configuration of Control Device) 
     The controller  104  controls, on the basis of a status change of each the connected imaging devices  200 , a display indicating the status changes. Specifically, the controller  104  controls a display indicating the communication status of each of the imaging devices  200 . Furthermore, the controller  104  controls the display differently according to the configured display mode. 
     If the display mode is single-view mode, the controller  104  controls the display to indicate the status change of the imaging device  200  corresponding to the individually displayed image. In addition, the controller  104  controls the display to indicate status changes of imaging devices  200  other than the imaging device  200  corresponding to the individually displayed image. Specifically, the controller  104  controls the display to indicate a change in communication status on the basis of a change in the communication status of the imaging device  200  corresponding to the individually displayed image, and also controls the display to indicate a change in communication status on the basis of the changes in the communication statuses of imaging devices  200  other than the above imaging device  200 . For example, when communication with the imaging device  200  corresponding to the individually displayed image is disconnected, the controller  104  switches the display mode to the multi-view mode. Also, when there is change in the presence or absence of a communication connection with a imaging device  200  other than the imaging device  200  related to the individually displayed image, the controller  104  causes the display  108  to display an image indicating that the presence or absence of that communication connection has changed. 
     If the display mode is multi-view mode, the controller  104  controls the display to indicate status changes on the basis of the status change of each of the imaging devices  200  corresponding to each of the listed images. Specifically, the controller  104  controls, on the basis of a change in communication status of an imaging device  200 , a display indicating the change in communication status. For example, the controller  104  controls the display of the image corresponding to the imaging device  200  related to a change in the presence or absence of a communication connection. 
     &lt;3-2. Device Operation&gt; 
     Next, processing by the control device  100 - 2  according to the present embodiment will be described. 
     (Overall Process Flow) 
     First, the overall processing by the control device  100 - 2  will be summarized with reference to  FIG.  25   .  FIG.  25    is a flowchart that conceptually illustrates a summary of overall processing by the control device  100 - 2  according to the present embodiment. Note that description will be reduced or omitted for processes which are substantially the same as processes in the first embodiment. 
     First, the communication unit  102  activates the application in multi-connection mode (step S 402 ), and displays images received from the connected imaging devices  200  (step S 404 ). 
     Next, the control device  100 - 2  determines whether or not the presence or absence of a communication connection with an imaging device  200  has changed (step S 406 ). Specifically, the controller  104  determines whether or not communication with a connected imaging device  200  has been disconnected, or whether or not a communication connection has been made with a new imaging device  200 . 
     In the case of determining that the presence or absence of a communication connection with an imaging device  200  has changed, the control device  100 - 2  determines whether or not the display mode is multi-view mode (step S 408 ). Specifically, when a connection with an imaging device  200  is disconnected or newly made, the controller  104  determines whether or not the display mode is multi-view mode. 
     If the display mode is determined to be multi-view mode, the control device  100 - 2  executes display control to indicate the status changes of the imaging devices  200  corresponding to the displayed images (step S 410 ). Specifically, the controller  104  executes display control of the images corresponding to the imaging devices  200  whose communication status has changed from among the imaging devices  200  corresponding to the listed images. 
     If the display mode is determined not to be multi-view mode, or in other words determined to be single-view mode, the control device  100 - 2  determines whether or not the imaging device  200  whose communication status has changed is the imaging device  200  corresponding to the displayed image (step S 412 ). Specifically, the controller  104  determines whether or not a disconnected imaging device  200  is the imaging device  200  corresponding to the displayed image. 
     In the case of determining that an imaging device  200  whose presence or absence of a communication connection changed is the imaging device  200  corresponding to the displayed image, the control device  100 - 2  changes the display mode to multi-view mode (step S 414 ). Specifically, in the case of determining that a disconnected imaging device  200  is the imaging device  200  corresponding to the displayed image, the controller  104  changes the display mode to multi-view mode, and causes the display  108  to transition the display screen to the multi-view screen. 
     In the case of determining that an imaging device  200  whose presence or absence of a communication connection changed is not the imaging device  200  corresponding to the displayed image, the control device  100 - 2  temporarily displays an image indicating the change in the presence or absence of a communication connection (step S 416 ). Specifically, in the case of determining that a disconnected imaging device  200  is not the imaging device  200  corresponding to the displayed image or that a new communication connection has been made from an imaging device  200 , the controller  104  causes the display  108  to display an image indicating the communication disconnection or the communication connection for a designated time. 
     Next, a display control process based on a status change in the communication connection of the imaging device  200  on the control device  100 - 2  will be described. First, a display control process when making a new communication connection with the imaging device  200  will be described with reference to  FIGS.  26 A to  26 D .  FIGS.  26 A to  26 D  are diagrams for explaining a display control process when making a new communication connection with the imaging device  200  on the control device  100 - 2  according to the present embodiment. 
     (Display Control Process when New Communication Connection with Imaging Device  200  is Made) 
     First, when a new communication connection with the imaging device  200  is established, the controller  104  specifies the type of the display screen. For example, when a communication connection with the imaging device  200  is newly added, the controller  104  specifies whether the currently displayed screen is the standby screen indicating that the control device  100 - 2  is waiting for a connection from the imaging device  200 , the imaging device  200  list screen, or a single-view screen or multi-view screen from among the operating screens. 
     Next, the controller  104  controls the display according to the specified type of the display screen. For example, if the display screen is the standby screen, the controller  104  causes the display  108  to transition the display screen to the imaging device  200  list screen and also display an image  70  indicating that a new communication connection with the imaging device  200  was made, as illustrated in the lower part of  FIG.  26 A . Meanwhile, if the display screen is the imaging device  200  list screen, the controller  104  causes the display  108  to additionally display on the list screen information indicating the newly connected imaging device  200  and also display the image  70  indicating that a new communication connection with the imaging device  200  was made, as illustrated in the lower part of  FIG.  26 B . Note that the image  70  may also be an image that disappears after a designated time elapses, such as a Toast image, for example. 
     Meanwhile, if the display screen is the single-view screen, the controller  104  causes the display  108  to update the display indicating the number of connected imaging devices  200  and also display the image  70  indicating that a new communication connection with the imaging device  200  was made, as illustrated in the lower part of  FIG.  26 C . Meanwhile, if the display screen is the multi-view screen, the controller  104  causes the display  108  to additionally display the display set corresponding to the newly connected imaging device  200  and also display the image  70  indicating that a new communication connection with the imaging device  200  was made, as illustrated in the lower part of  FIG.  26 D . 
     Next, a display control process when communication with the imaging device  200  is disconnected will be described with reference to  FIGS.  27 A to  27 C  and  FIG.  28   .  FIGS.  27 A to  27 C  and  FIG.  28    are diagrams for explaining a display control process when communication with the imaging device  200  is disconnected on the control device  100 - 2  according to the present embodiment. Note that description will be reduced or omitted for processes that are substantially the same as the processes discussed above. 
     (Display Control Process when Communication with Imaging Device  200  is Disconnected) 
     First, when communication with the imaging device  200  is disconnected, the controller  104  specifies the type of the display screen. 
     Next, the controller  104  controls the display according to the specified type of display screen. For example, if the display screen is the imaging device  200  list screen, the controller  104  causes the display  108  to remove from the list screen information indicating the disconnected imaging device  200  and also display an image  72  indicating the disconnected imaging device  200  as well as indicating that the imaging device  200  was disconnected, as illustrated in the lower part of  FIG.  27 A . Note that the image  72  may also be an image that disappears after a designated time elapses, such as a Toast image, for example. 
     Also, if the display screen is the single-view screen, the controller  104  determines whether or not the disconnected imaging device  200  is the imaging device  200  corresponding to the display screen. Subsequently, in the case of determining that the disconnected imaging device  200  is not the imaging device  200  corresponding to the display screen, the controller  104  causes the display  108  to update the display indicating the number of connected imaging devices  200  and also display the image  72  indicating the disconnected imaging device  200  as well as indicating that the imaging device  200  was disconnected, as illustrated in the diagram to the left on the lower row of  FIG.  27 B . Also, in the case of determining that the disconnected imaging device  200  is the imaging device  200  corresponding to the display screen, the controller  104  causes the display  108  to transition the display screen to the multi-view screen and also display the image  72  indicating the disconnected imaging device  200  as well as indicating that the imaging device  200  was disconnected, as illustrated in the diagram to the right on the lower row of  FIG.  27 B . Note that on the multi-view screen after the transition, the display set corresponding to the disconnected imaging device  200  is not displayed. 
     Also, if the display screen is the multi-view screen, the controller  104  causes the display  108  to remove the display set corresponding to the disconnected imaging device  200  and also display the image  72  indicating the disconnected imaging device  200  as well as indicating that the imaging device  200  was disconnected, as illustrated in the lower part of  FIG.  27 C . Note that in addition to removing a display set, the display sets may also be changed. For example, the identification numbers may be moved up for the display sets related to identification numbers that came after the identification number of the removed display set. 
     Note that if no more connected imaging devices  200  exist, the controller  104  may also cause the display  108  to transition the display screen to a standby screen indicating that the control device  100 - 2  is waiting for a connection from an imaging device  200 . For example, when an imaging device  200  is disconnected, the controller  104  determines whether or not at least one imaging device  200  is connected. In the case of determining that no imaging devices  200  are connected, the controller  104  causes the controller  104  to transition the display screen to the standby screen. For example, if the display screen is one from among the imaging device  200  list screen, the single-view screen, and the multi-view screen, the display screen is transitioned to the standby screen, as illustrated in  FIG.  28   . 
     In this way, according to the second embodiment of the present disclosure, the control device  100 - 2  controls the display to indicate a status change in each of the imaging devices  200  corresponding to each of the listed images. For this reason, the user may easily perceive status changes in the listed imaging devices  200 , and become able to rapidly address such status changes. 
     In addition, the above status change of the imaging device  200  includes a change in the communication status of the imaging device  200 . For this reason, by informing the user of a status change in communication with the imaging device  200  which is related to control of the imaging device  200 , it becomes possible to minimize missed control opportunities and incorrect control of the imaging device  200  due to the user not knowing about the status change. 
     In addition, the control device  100 - 2  controls the display of an image related to the imaging device  200  for which the presence or absence of a communication connection has changed. For this reason, by informing the user of the change in the presence or absence of the communication connection, it becomes possible to further minimize missed control opportunities and incorrect control of the imaging device  200 . 
     In addition, on the single-view screen, the control device  100 - 2  controls the display to indicate status changes of imaging devices  200  other than the imaging device  200  corresponding to the individually displayed image. For this reason, by informing the user of the status of other imaging devices  200  while the user is focusing on operating a single imaging device  200 , it becomes possible to save the user from the burden of switching the display mode, or in other words the display screen, and thereby improve usability. 
     &lt;3-3. Modifications&gt; 
     The foregoing thus describes the second embodiment of the present disclosure. However, an embodiment is not limited to the foregoing example. Hereinafter, modifications of the present embodiment will be described. 
     As a modification of the present embodiment, the control device  100 - 2  may also control the display on the basis of a malfunction occurring in the imaging device  200 . Specifically, the controller  104  causes the display  108  to display an object indicating an ongoing error that occurs in an ongoing manner as a first malfunction. Note that an ongoing error includes errors that occur continuously or intermittently, and may be a lack of media inserted into the imaging device  200  or a temperature increase in the imaging device  200 , for example. In addition, a display control process based the occurrence of an ongoing error in the imaging device  200  will be described with reference to  FIGS.  29  and  30   .  FIG.  29    is a diagram illustrating an example of a display related to an ongoing error on a single-view screen of the control device  100 - 2  according to a modification of the present embodiment, and  FIG.  30    is a diagram illustrating an example of a display related to an ongoing error on a multi-view screen of the control device  100 - 2  according to a modification of the present embodiment. 
     (Display Control Based on Occurrence of Ongoing Error) 
     First, the controller  104  detects the occurrence of an error in the imaging device  200 . For example, the controller  104  detects the occurrence of an error in the imaging device  200  on the basis of error information received from the imaging device  200  where the error occurred. 
     When the occurrence of an error in the imaging device  200  is detected, the controller  104  specifies the type of the detected error. For example, the controller  104  specifies the type of error on the basis of error type information or the like included in error information received from the imaging device  200 . 
     Next, if specified error type is an ongoing error, the controller  104  presents a display indicating the occurrence of an ongoing error, according to the currently configured display mode. 
     For example, if the display mode is single-view mode, the controller  104  causes the display  108  to display an image  74  made up of an icon indicating the occurrence of an ongoing error and a text string explaining the content of the error, as illustrated in  FIG.  29   . Note that the image  74  is continually displayed while the ongoing error is occurring. 
     Meanwhile, if the display mode is multi-view mode, the controller  104  causes the display  108  to display an object indicating the occurrence of an ongoing error in association with the image corresponding to the imaging device  200  where the ongoing error occurred. For example, the controller  104  causes the display  108  to display an icon  76  indicating the occurrence of an ongoing error, overlaid onto the display set corresponding to the imaging device  200  where the ongoing error occurred, such as the image  30 , for example, as illustrated in  FIG.  30   . 
     (Display Control Based on Occurrence of Isolated Error) 
     In addition, the controller  104  may also cause the display  108  to display an object indicating an isolated error that occurs in an isolated manner as a second malfunction. For example, an isolated error may be a failure of operation in the imaging device  200 , the receiving of an instruction for unsupported operation, or the like. A display control process based the occurrence of an isolated error in the imaging device  200  will be described with reference to  FIGS.  31 A and  31 B , and  FIG.  32   .  FIGS.  31 A and  31 B  are diagrams illustrating an example of a display related to an isolated error on a single-view screen of the control device  100 - 2  according to a modification of the present embodiment, and  FIG.  32    is a diagram illustrating an example of a display related to an isolated error on a multi-view screen of the control device  100 - 2  according to a modification of the present embodiment. Note that description will be reduced or omitted for processes that are substantially the same as the processes for an ongoing error. 
     First, the controller  104  detects the occurrence of an error in the imaging device  200 , and specifies the type of the detected error. 
     Next, if specified error type is an isolated error, the controller  104  presents a display indicating the occurrence of an isolated error, according to the currently configured display mode. 
     For example, if the display mode is single-view mode, the controller  104  determines whether or not the imaging device  200  where the isolated error occurred is the imaging device  200  related to the image displayed on the single-view screen. In the case of determining that the imaging device  200  where the error occurred is the imaging device  200  related to the displayed image, the controller  104  causes the display  108  to display a dialog  78  including an indication that an isolated error occurred in the imaging device  200  related to the displayed image, as well as a text string explaining the content of the error, as illustrated in  FIG.  31 A . Note that the dialog  78  is removed from the display screen if the user performs a confirmation operation. Meanwhile, in the case of determining that the imaging device  200  where the isolated error occurred is another imaging device  200  other than the imaging device  200  related to the displayed image, the controller  104  causes the display  108  to display an image  80  indicating that an isolated error occurred in the corresponding other imaging device  200 , as illustrated in  FIG.  31 B . Note that the image  80  may also be an image that disappears after a designated time elapses, such as a Toast image, for example. 
     Meanwhile, if the display mode is multi-view mode, the controller  104  causes the display  108  to display an image  82  indicating that an isolated error occurred in the corresponding other imaging device  200 , as illustrated in  FIG.  32   . Note that if an isolated error occurs in each of multiple imaging devices  200 , the controller  104  may cause the display  108  to display and remove an image  82  for each imaging device  200  where an isolated error occurred in order of error occurrence, or arrange and display multiple images  82 . 
     In this way, according to the modification of the present embodiment, the control device  100 - 2  controls the display to indicate the occurrence of a malfunction in each of the imaging devices  200  corresponding to each of the listed images. For this reason, by informing the user of a malfunction in an imaging device  200  related to the list display, the user becomes able to quickly switch the display screen to the single-view screen in order to individually operate the imaging device  200  where the malfunction occurred, and address the malfunction. 
     In addition, the control device  100 - 2  displays an object indicating the occurrence of an ongoing error. For this reason, by enabling the user to recognize an ongoing error more easily, it becomes possible to reduce the possibility of the occurrence of an ongoing error being overlooked. 
     In addition, the control device  100 - 2  displays an object indicating the occurrence of an ongoing error in association with the image corresponding to the imaging device  200  where the ongoing error occurred. For this reason, it is easier to perceive which imaging device  200  the ongoing error occurred in, enabling the user to address the ongoing error more rapidly. 
     In addition, the control device  100 - 2  displays an object which indicates the occurrence of an isolated error, and which disappears after a designated time elapses. For this reason, when isolated errors occur repeatedly, it is possible to prevent reduced visibility of the display screen as a result of displays related to the non-ongoing isolated errors remaining on the display screen. 
     4. HARDWARE CONFIGURATION OF CONTROL DEVICE ACCORDING TO EMBODIMENT OF THE PRESENT DISCLOSURE 
     The control device  100  according to embodiments of the present disclosure have been described above. The processes of the control device  100  described above are realized through cooperation of software and the hardware of the control device  100  to be described below. 
       FIG.  33    is an explanatory diagram illustrating a hardware configuration of the control device  100  according to an embodiment of the present disclosure. As illustrated in  FIG.  33   , the control device  100  includes a central processing unit (CPU)  132 , a read-only memory (ROM)  134 , a random access memory (RAM)  136 , a bridge  138 , a bus  140 , an interface  142 , an input device  144 , an output device  146 , a storage device  148 , a drive  150 , a connection port  152 , and a communication device  154 . 
     The CPU  132  functions as an arithmetic processing apparatus and realizes an operation of the control unit  102  in the control device  100  in cooperation with various programs. The CPU  132  may be a microprocessor. The ROM  134  stores programs, arithmetic parameters, and the like used by the CPU  132 . The RAM  136  temporarily stores programs used in execution of the CPU  132  or parameters or the like properly changed in execution thereof. A part of the storage unit  106  in the control device  100  is realized by the ROM  134  and the RAM  136 . The CPU  132 , the ROM  134 , and the RAM  136  are mutually connected by an internal bus configured by a CPU bus or the like. 
     The input device  144  is configured to include an input unit, such as a mouse, a keyboard, a touch panel, a button, a microphone, a switch, and a lever, used for the user to input information, and an input control circuit such as the operation detector  110  generating an input signal based on an input by the user and outputting the input signal to the CPU  132 . The user of the control device  100  can input various kinds of data or can give an instruction of a processing operation to the control device  100  by manipulating the input device  144 . 
     The output device  146  outputs information to, for example, a device such as a liquid crystal display (LCD) device, an organic light emitting diode (OLED) device, or a lamp. The output device  146  may output an audio of a speaker, a headphone, and the like. 
     The storage device  148  is a device that stores data. The storage device  148  may include a storage medium, a recording device recording data on a storage medium, a reading device reading data from a storage medium, or a deletion device deleting data recorded on a storage medium. The storage device  148  stores programs executed by the CPU  132  or various kinds of data. 
     The drive  150  is a reader/writer for a storage medium, and is internally housed inside, or externally attached to, the control device  100 . The drive  150  reads out information recorded to a removable storage medium such as an inserted magnetic disk, optical disc, magneto-optical disc, or semiconductor memory, and outputs such information to the RAM  134 . Additionally, the drive  150  may also write information to the removable storage medium. 
     The connection port  152  is, for example, a bus connected to an external information processing process or a peripheral device of the control device  100 . The connection port  152  may be a Universal Serial Bus (USB). 
     The communication device  154  is an example of the communication unit  102  of the control device  100  and is, for example, a communication interface configured by a communication device connected to a network. The communication device  154  may be a communication device corresponding to a wireless local area network (LAN), or may be a communication device corresponding to Long Term Evolution (LTE). 
     5. CONCLUSION 
     As above, according to the first embodiment of the present disclosure, dynamic connections are enabled between the control device  100 - 1  and each of the multiple imaging devices  200 , and each of the images acquired from each of the multiple imaging devices  200  is perceivably displayed at a glance. Consequently, it is possible for the user to easily perceive the images corresponding to each of the multiple connected imaging devices  200 , while also retaining flexibility in the format of communication with the imaging devices  200 . In addition, according to the second embodiment of the present disclosure, the user may easily perceive status changes in the listed imaging devices  200 , and become able to rapidly address such status changes. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof. 
     For example, the foregoing embodiments describe examples of screen transitions for each process, the present technology is not limited to such examples. For example, the controller  104  may also cause the display  108  to transition the display screen without going through any of the screens described in the foregoing embodiments, or by going through another screen. For example, the controller  104  may cause the display  108  to transition directly from the standby screen illustrated in the diagram to the left in  FIG.  5    to the confirmation screen for changing the communication mode setting illustrated in the diagram to the right in  FIG.  5   , without going through the screen illustrated in the middle diagram in  FIG.  5   . In this case, a GUI element such as a button for changing the communication mode setting is made available on the standby screen. 
     Also, the second embodiment above describes an example in which, on the multi-view screen, the displayed content of the display sets is controlled on the basis of a status change in the communication connection. However, the display layout of the display sets may also be controlled. For example, if a communication connection is added or removed, the controller  104  may increase, decrease, or maintain the number of display sets to display, according to the number of connected imaging devices  200 . 
     The effects described in the specification are just explanatory or exemplary effects, and are not limiting. That is, the technology according to an embodiment of the present disclosure can exhibit other effects that are apparent to a person skilled in the art from the descriptions in the specification, along with the above effects or instead of the above effects. 
     (1) 
     A control method including: 
     connecting with a plurality of imaging devices via wireless communication, and communicating with each of the plurality of imaging devices; 
     specifying each of images corresponding to each of the plurality of imaging devices, on the basis of the communication; and 
     listing the specified images. 
     (2) 
     The control method according to (1), further including: 
     conducting, on the basis of an occurrence of an event related to at least one of the imaging devices, operational control related to the imaging devices corresponding to the listed images. 
     (3) 
     The control method according to (2), wherein 
     the event includes a user operation directed at the imaging devices, and 
     the control method further includes conducting operational control based on the user operation performed in a list display state for each of the imaging devices corresponding to each of the listed images. 
     (4) 
     The control method according to (3), wherein 
     the operational control based on the user operation includes an operational instruction with respect to the imaging devices. 
     (5) 
     The control method according to (4), wherein 
     the operational instruction includes an instruction related to image recording with respect to the imaging devices, and 
     the control method further includes deciding instruction content on the basis of an operational state of each of the imaging devices corresponding to each displayed image. 
     (6) 
     The control method according to (5), further including: 
     in the list display state, ending the image recording without presenting a confirmation display to a user regarding a result of recording by the imaging devices conducted on the basis of the instruction related to the image recording. 
     (7) 
     The control method according to (4), wherein 
     the operational instruction includes an instruction related to a setting with respect to the imaging devices, and 
     the control method further includes deciding instruction content on the basis of a setting shared in common among the imaging devices corresponding to displayed images. 
     (8) 
     The control method according to any one of (1) to (7), further including: 
     conducting, when a status change occurs in the imaging devices, display control to indicate the status change in each of the imaging devices corresponding to each of the listed images. 
     (9) 
     The control method according to (8), wherein 
     the status change in the imaging devices includes a change in a communication state of the imaging devices. 
     (10) 
     The control method according to (9), wherein 
     the change in the communication state of the imaging devices includes a change in a presence or absence of a communication connection with the imaging devices, and the control method further includes controlling display of an image related to the imaging devices for which the presence or absence of a communication connection has changed.
 
(11)
 
     The control method according to any one of (8) to (10), wherein 
     the status change in the imaging devices includes an occurrence of a malfunction in the imaging devices. 
     (12) 
     The control method according to (11), wherein 
     the malfunction includes a malfunction that occurs in an ongoing manner, and 
     the control method further includes displaying an object indicating the malfunction that occurs in an ongoing manner. 
     (13) 
     The control method according to (12), further including: 
     displaying the object indicating the malfunction that occurs in an ongoing manner in association with the images corresponding to the imaging devices where the malfunction that occurs in an ongoing manner has occurred. 
     (14) 
     The control method according to any one of (11) to (13), wherein 
     the malfunction includes a malfunction that occurs in an isolated manner, and 
     the control method further includes displaying an object which indicates the malfunction that occurs in an isolated manner, and which disappears after a designated time elapses. 
     (15) 
     The control method according to any one of (1) to (14), further including: 
     displaying, in association with each of the listed images, an object indicating a correspondence relationship between each of the listed images and each of the imaging devices. 
     (16) 
     The control method according to any one of (1) to (15), further including: 
     individually displaying one from among the images; and 
     switching display between list display of the images and individual display of the image. 
     (17) 
     The control method according to (16), further including: 
     conducting operational control based on a user operation directed at the imaging devices in an individual display state, only for the imaging devices corresponding to the individually displayed image. 
     (18) 
     The control method according to (16) or (17), further including: 
     conducting, in an individual display state, display control to indicate a status change in the imaging devices other than the imaging devices corresponding to the individually displayed image. 
     (19) 
     A control device including: 
     a communication unit that connects with a plurality of imaging devices via wireless communication, and communicates with each of the plurality of imaging devices; and 
     a controller that specifies each of images corresponding to each of the plurality of imaging devices, on the basis of the communication, and lists the specified images. 
     (20) 
     A program causing a computer to realize: 
     a communication function that connects with a plurality of imaging devices via wireless communication, and communicates with each of the plurality of imaging devices; and 
     a control function that specifies each of images corresponding to each of the plurality of imaging devices, on the basis of the communication, and lists the specified images. 
     (21) 
     A control method comprising: 
     wirelessly communicating with a plurality of imaging devices; and 
     displaying identifiers corresponding respectively to the plurality of imaging devices, on the basis of the communication. 
     (22) 
     The control method according to (21), further comprising: 
     controlling an operation of each of the plurality of imaging devices in response to an event related to at least one of the plurality of imaging devices. 
     (23) 
     The control method according to any one of (21) and (22), wherein 
     the event includes a user operation that is directed at the plurality of imaging devices while the identifiers are being displayed, and 
     the controlling an operation of each of the plurality of imaging devices in response to the user operation includes controlling a recording operation of each of the plurality of imaging devices. 
     (24) 
     The control method according to any one of (21) through (23), wherein 
     for those of the plurality of imaging devices in a moving-image shooting mode, the controlling of the recording operation in response to the user operation includes deciding whether to start or stop moving-image recording based on an operational state of each of the plurality of imaging devices.
 
(25)
 
     The control method according to any one of (21) through (24), wherein 
     the controlling of the recording operation of at least one of the plurality of imaging devices in response to the user operation includes controlling the imaging device to stop moving-image recording without presenting a confirmation display to a user regarding a result of the recording.
 
(26)
 
     The control method according to any one of (21) through (25), wherein 
     the identifiers includes a list of identifiers, 
     the event includes a user operation of selecting, while the list of identifiers is being displayed, an imaging device setting, and 
     the controlling an operation of each of the plurality of imaging devices in response to the user operation includes setting each of the plurality of imaging devices to the selected imaging device setting. 
     (27) 
     The control method according to any one of (21) through (26), further comprising: 
     in response to the user initiating a setting-change operation while the list of identifiers is being displayed, displaying a list of imaging device settings as selection options, where the list of imaging device settings excludes imaging device settings that are not shared in common by each of the plurality of imaging devices,
 
wherein the imaging device setting selected by the user operation is selected from the displayed list of imaging device settings.
 
(28)
 
     The control method according to any one of (21) through (27), 
     wherein the selected image device setting is one of a moving-image shooting mode and a still image shooting mode. 
     (29) 
     The control method according to any one of (21) through (28), further comprising: changing the display of corresponding identifier to indicate a status change in at least one of the plurality of imaging devices. 
     (30) 
     The control method according to any one of (21) through (29), wherein 
     the status change in the at least one of the plurality of imaging devices includes a change in a communication state of the at least one of the plurality of imaging devices. 
     (31) 
     The control method according to any one of (21) through (30), wherein 
     the change in the communication state of the at least one of the plurality of imaging devices includes a change in a presence or absence of a communication connection with the at least one of the plurality of imaging devices. 
     (32) 
     The control method according to any one of (21) through (31), wherein 
     the status change in the at least one of the plurality of imaging devices includes an occurrence of a malfunction in the at least one of the plurality of imaging devices. 
     (33) 
     The control method according to any one of (21) through (32), wherein 
     the malfunction includes an ongoing malfunction, and 
     the control method further includes displaying an object indicating the ongoing malfunction. 
     (34) 
     The control method according to any one of (21) through (33), further comprising: 
     displaying the object indicating the ongoing malfunction in association with the identifier corresponding to the at least one of the plurality of imaging devices experiencing the ongoing malfunction. 
     (35) 
     The control method according to any one of (21) through (34), wherein 
     the malfunction includes an isolated malfunction and 
     the control method further includes displaying an object which indicates the isolated malfunction, and which disappears after a designated time elapses. 
     (36) 
     The control method according to any one of (21) through (35), 
     wherein each of the identifiers includes an image for the corresponding imaging device and an object indicating a correspondence relationship between the image and the corresponding imaging device. 
     (37) 
     The control method according to any one of (21) through (36), 
     wherein, for each of the plurality of imaging devices, the identifiers include at least one of: an image corresponding to the imaging device, a name of the imaging device, a symbol corresponding to the imaging device, and a number corresponding to the imaging device.
 
(38)
 
     The control method according to any one of (21) through (37), 
     wherein for each of the plurality of imaging devices, the identifiers include an image captured by the imaging device and wirelessly communicated by the imaging device. 
     (39) 
     The control method according to any one of (21) through (38), further comprising: 
     switching between displaying the identifiers simultaneously and displaying an image corresponding to a given one of the plurality of imaging devices individually. 
     (40) 
     The control method according to any one of (21) through (39), further comprising: 
     while displaying the image corresponding to the given one of the plurality of imaging devices individually, controlling an operation of the given one of the plurality of imaging devices based on a user operation and not controlling an operation of the other ones of the plurality of imaging devices based on the user operation.
 
(41)
 
     The control method according to any one of (21) through (40), further comprising: 
     while displaying the image corresponding to the given one of the plurality of imaging devices individually, changing the display to indicate a status change in one of the plurality of imaging devices other than the given one of the plurality of imaging devices.
 
(42)
 
     A control device comprising: 
     a communication unit that wirelessly communicates with each of a plurality of imaging devices; and 
     a controller that displays a list of identifiers corresponding respectively to the plurality of imaging devices, on the basis of the communication. 
     (43) 
     A non-transitory computer readable medium having program code stored thereon that is configured to, when executed by a computing device, cause the computing device to: 
     switch between a multiple-unit control mode and a single-unit control mode, when in the multiple-unit control mode: 
     display identifiers corresponding respectively to a plurality of imaging devices, and in response to a given user input, control a given operation of each of the plurality of imaging device via wireless communication connections; and when in the single-unit control mode:
 
display an identifier corresponding to a selected one of the plurality of imaging devices, and
 
in response to the given user input, control the given operation of the selected one of the plurality of imaging devices and not the others of the plurality of imaging devices.
 
(44)
 
     The non-transitory computer readable medium of (43), wherein 
     the given user input is a selection of an image recording control button, and 
     the given operation is an image recording operation. 
     (45) 
     The non-transitory computer readable medium of any one of (43) through (44), wherein 
     the given user input is a selection of an imaging device setting, and 
     the given operation is setting the respective imaging device to the selected imaging device setting. 
     (46) 
     The non-transitory computer readable medium of any one of (43) through (45), wherein 
     wherein, for each of the plurality of imaging devices, the identifiers include at least one of: an image corresponding to the imaging device, a name of the imaging device, a symbol corresponding to the imaging device, and a number corresponding to the imaging device.
 
(47)
 
     The non-transitory computer readable medium of any one of (43) through (46), wherein the program code is configured to cause the computing device to switch from the multiple-unit control mode to the single-unit control mode in response to a user selection of one of the displayed identifiers. 
     (48) 
     The non-transitory computer readable medium of any one of (43) through (47), wherein the program code is configured to cause the computing device to establish the wireless communication connections with the plurality of imaging devices. 
     REFERENCE SIGNS LIST 
     
         
           100  control device 
           102  communication unit 
           104  controller 
           106  storage 
           108  display 
           110  operation detector 
           200  imaging device 
           202  operation detector 
           204  controller 
           206  storage 
           208  communication unit 
           210  imaging unit