Patent Publication Number: US-11647276-B2

Title: Portable information device having real-time display with relevant information

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a divisional of U.S. application Ser. No. 17/142,722 filed on Jan. 6, 2021, which is a divisional of Ser. No. 15/648,777 filed on Jul. 13, 2017, which is a divisional of U.S. application Ser. No. 14/247,737 filed Apr. 8, 2014, which is a divisional of U.S. application Ser. No. 12/461,324 filed Aug. 7, 2009, which is a non-provisional application claiming priority to and the benefit of U.S. provisional application No. 61/136,294, filed Aug. 26, 2008, and claims priority to Japanese Patent Application No. 2008-205729, filed Aug. 8, 2008, the disclosures of which are hereby incorporated herein by reference in their entireties. 
    
    
     BACKGROUND 
     Field of the Invention 
     The present invention relates to a portable information device, imaging apparatus, and information acquisition system. 
     Description of Related Art 
     Conventionally, there are portable information devices such as imaging apparatuses (for example, digital cameras), which have an imaging function, having a function for detecting the position information of the portable information devices and processing image data, which is acquired by performing imaging, in association with the detected position information (for example, see Japanese Patent Application Publication No. 2004-15187). 
     A purpose of some aspects of the present invention is to provide a portable information device, an imaging apparatus, and an information acquisition system, that can enhance a user&#39;s activity. 
     SUMMARY 
     According to an aspect of the present invention, a portable information device is provided, the portable information device including: an image sensor; a position information acquisition portion that outputs position information; an orientation sensor; and a display that displays an image of an object out put from the image sensor and displays relevant information on the object, the relevant information being obtained based on at least measurement data from the position information acquisition portion and the orientation sensor. 
     According to another aspect of the present invention, an information acquisition system is provided, the information acquisition system including: a server; a database; and a portable information device that comprises an image sensor, a position information acquisition portion that outputs position information, an orientation sensor, a display, and a wireless communication portion, the display displaying an image of an object output from the image sensor and displays relevant information on the object, the relevant information being obtained from the database via the wireless communication portion and the server based on at least measurement data from the position information acquisition portion and the orientation sensor. 
     According to another aspect of the present invention, an imaging apparatus is provided, the imaging apparatus including: an imaging portion that takes an image of a subject; a position information acquisition portion that acquires position information of an imaging position; and an orientation information acquisition portion that acquires orientation information representing an imaging direction at the imaging position. 
     According to another aspect of the present invention, an information acquisition is provided, the information acquisition system including: an imaging apparatus; and an information search system. The information search system searches for the information on a subject of which an image is taken by the imaging apparatus and transmits the search result to the imaging apparatus. The imaging apparatus includes: an imaging portion that takes an image of a subject; a position information acquisition portion that acquires position information of an imaging position; and an orientation information acquisition portion that acquires orientation information representing an imaging direction at the imaging position. The information search system includes: a database in which the information on the subject is stored in association with the position information and the orientation information; and an information search server that searches for the information on the subject corresponding to the position information and the orientation information acquired by performing imaging for image data from the database based on the position information and the orientation information of the image data acquired by performing imaging using the imaging apparatus. 
     According to another aspect of the present invention, a portable information device is provided, the portable information device including; a position information acquisition portion that outputs position information; a display; and a control portion that displays information on an object and an image of the object so as to be associated with each other, the information on the object being obtained based on at least the position information from the position information acquisition portion, and on data used for identifying the object that is imaged at an imaging position, the imaging position being on the basis of the position information. 
     According to some aspects of the present invention, a portable information device, an imaging apparatus, and an information acquisition system, that can enhance a user&#39;s activity, are provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a block diagram representing a configuration example of an information acquisition system according to an embodiment of the present invention. 
         FIG.  2    is a schematic diagram representing a configuration example of a building structure table that is stored in a database represented in  FIG.  1   . 
         FIG.  3    is a flowchart representing the flow of an information searching process for an image of which the image is taken by a digital camera according to this embodiment. 
         FIG.  4    is a diagram representing an example of a display image displayed in the digital camera according to this embodiment. 
         FIG.  5    is a diagram representing an example of a display image displayed in the digital camera according to this embodiment. 
         FIG.  6    is a diagram representing an example of a display image displayed in the digital camera according to this embodiment. 
         FIG.  7    is a flowchart representing the flow of an information searching process for an image being taken by the digital camera according to this embodiment. 
         FIG.  8    is a flowchart representing the flow of an information searching process on the basis of the store information that is input to the digital camera according to this embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.  FIG.  1    is a block diagram representing a configuration example of a portable information device (an imaging apparatus) and the information acquisition system according to the embodiment. 
     In  FIG.  1   , the information acquisition system includes a digital camera  1  as an example of the imaging apparatus and an information search system  2 . The digital camera  1  transmits or receives data to or from the information search system  2  (or an information search server  21  to be described later) through a wireless base station  3  and an information communication network  4  such as the Internet by performing data communication with the wireless base station  3  through wireless communication. The imaging apparatus according to this embodiment is an imaging unit-equipped mobile terminal such as the above-described digital camera  1  or a camera-equipped cellular phone. 
     The digital camera  1  has a browsing function. The digital camera  1  includes a control portion  11 , a communication portion  12 , an imaging portion  13 , a GPS (global positioning system) (a position information acquisition portion) locator  14 , a memory portion  15 , an orientation sensor  16 , a display portion  17 , and a timer  18 . Here, the wireless communication according to this embodiment includes communication using electric waves, light, sound waves, or the like without using any wire as a transmission channel. 
     The imaging portion  13  includes a CCD (charge coupled device) image sensor or a CMOS (complementary metal oxide semiconductor) image sensor, a lens, and the like. The imaging apparatus  13  takes an image of a subject (an object of which image is to be taken) and outputs image data to the control portion  11 . In the description below, a subject according to this embodiment represents a building structure (a commercial building such as a store, a public building such as a school or a hospital, a factory, a house such as a mansion, an artificial construction such as a steel tower, a bridge, a dam, an amusement park, a statue, or the like). 
     When receiving a control signal (for example, a control signal output by a peripheral circuit, not shown in the figure, that has detected the pressing of an imaging button B 1 ) from a user for directing to take an image or a control signal (for example, a control signal output by a peripheral circuit, not shown in the figure, that has detected the selection of an icon (a signage) by the user touching the icon that represents a search or the like) for directing an information search, the GPS locator  14  acquires information on the latitude and longitude of the digital camera  1  and outputs the information to the control portion  11 . 
     The orientation sensor  16  is configured by an electronic compass (a geomagnetic sensor) or the like. When receiving a control signal (for example, a control signal output by a peripheral circuit, not shown in the figure, that has detected the press of an imaging button B 1 ) from a user for directing to take an image or a control signal (for example, a control signal output by a peripheral circuit, not shown in the figure, that has detected the selection of an icon (a signage) by the user touching the icon that represents a search or the like) for directing the information search, the orientation sensor  16  detects the orientation, for example, of the serial direction in which the CCD and the lens of the imaging portion  13  are disposed and outputs the detected orientation of the serial direction to the control portion  11  as the orientation information. Alternatively, the orientation sensor  16  can be configured to detect the orientation of the direction toward the subject (that is, the imaging direction) viewed from the user and output the orientation information of the subject to the control portion  11 . Here, when an orientation angle is used as the orientation information, the orientation angle is represented in units of degrees, minutes and seconds. For example, the orientation angle of the north side is used as a reference of 0 degree, and the orientation angles of the east side, the south side, and the west side are denoted by 90 degrees, 180 degrees, and 270 degrees in the clockwise direction from the north side with the latitude and the longitude of the position information used as a center point. 
     When a control signal for directing to take an image is received from a peripheral circuit not shown in the figure by the user&#39;s pressing of the imaging button B 1  or the like, the control portion  11  assigns image identification information to the picked up image data and writes the pickup up image data, time data acquired from the timer  18 , the position information, and the orientation information in the memory portion  15  in association with each image identification information, in the order of imaging. 
     The display portion  17  displays the image data that is taken by the imaging portion  13  or the image data that is selected by the user as an image to be displayed and is read out from the memory portion  15  by the control portion  11 . 
     In addition, the display portion  17 , as described below, displays the image data received from the information search system  2 , text data (character data) input by the user, or the like under the control of the control portion  11 . 
     The communication portion  12  transmits or receives data such as image data, text data, a control signal, or the like to or from the information search system  2  through the information communication network  4  by transmitting or receiving data to or from the wireless base station  3  by using wireless communication. 
     The information search system  2 , as shown in  FIG.  1   , includes the information search server  21  and a database  22 . The database  22  can be set up in a memory medium (for example, a memory, an HDD, or the like) inside the information search server  21 , a memory medium that is externally attached, or a memory medium of another terminal. 
     In the database  22 , as a building structure table represented in  FIG.  2   , building structure identification information used for identifying building structures, building names as the names of the building structures, building structure information (information such as an address, a telephone number, a type, and information on peripheral image data of the building structure), the position information such as the latitude and the longitude of the building structure, descriptions of the building structures (information prepared by a store for a case where the building structure is the store), and post information (a comment such as evaluation of a visited user, image data posted by the user, or the like) are stored. 
     In addition, in the database  22 , the map data, in which the registered building structures are disposed with the latitude and the longitude set as the coordinate axes in a two-dimensional plane, is stored. Here, in the map data, each building structure is represented in a position at the latitude and the longitude corresponding to the building structure identification information. 
     The information search server  21  searches for a building structure that is closest from the position at the latitude and the longitude represented by the position information in the direction represented by the orientation information by using the position information and the orientation information described above which have been input and acquires the building structure identification information of the found building structure. 
     In addition, the information search server  21  searches for a building structure corresponding to the building structure identification information of the found and acquired building structure from the building structure table and transmits the information of the found building structure (the building structure name, the building structure information, and the like) to the digital camera  1 . Alternatively, the information search server  21  can be configured to selectively transmit the information of the building structure to be transmitted to the digital camera  1 , for example, depending on the need for the capacity of the transmission data or the reception data or the like. In such a case, the information search server  21  can be configured to retransmit the remaining information out of the information of the building structure to the digital camera  1 , for example, in accordance with a predetermined operation (for example, a request from the digital camera  1 ) or the like. 
     &lt;Searching for Information on Imaging By Digital Camera  1 &gt; 
     Next, the operation of this embodiment will be described with reference to  FIGS.  1  and  3    together with  FIGS.  4  to  6   .  FIG.  3    is a flowchart representing an example of an information searching process according to this embodiment for a case where information search is desired to be performed in a state in which the digital camera  1  is in the process of imaging a building structure.  FIGS.  4  to  6    are diagrams representing the disposition of a screen displayed in the display portion  17  of the digital camera  1  and the imaging button B 1  of the digital camera  1 . 
     In description below, as an example, a case where a user searches for a dining restaurant while walking in a downtown street will be described. 
     When the user finds a restaurant having an external view of which information is desired to be acquired with the lens of the digital camera  1  positioned toward the restaurant having the favorable exterior view while strolling in the downtown street (Step S 1 ), as shown in  FIG.  4   , the user touches (presses down) a browsing icon  11  that is set up in the image display field MP of the digital camera  1 , thereby the browsing icon  11  is selected (Step S 2 ). 
     At this moment, the control portion  11  displays image data, of which the image is taken by the imaging portion  13 , that is input from the imaging portion  13  in the imaging state, that is, the image data of a restaurant of which the image is taken, as shown in  FIG.  4   , in the image display field MP through the display portion  17 . In addition, the image display field MP (image display portion) according to this embodiment is configured by a touch panel (for example, including a pressure-sensitive type, an electrostatic type, or a sound wave type). 
     In the above-described Step S 2 , the browsing icon  11  can be configured to be selected by being touched after the imaging button B 1  of the digital camera  1  is pressed down, while the image display field MP in which the image of the restaurant is displayed is viewed. 
     By touching the browsing icon  11 , a signal indicating the selection of the browsing icon  11  is output from a peripheral circuit not shown in the figure to the control portion  11 . 
     Then, the control portion  11  detects the selection of the browsing icon  11  in accordance with the input signal indicating the selection of the input browsing icon  11 , assigns image identification information to the image data of the above-described restaurant, the image of which is taken by the imaging portion  13 , and writes the image data and the imaging time in the memory portion  15  in association with the image identification information for storing the image data (Step S 3 ). 
     In addition, when the browsing icon  11  is touched, the control portion  11  writes the position information acquired by the GPS locator  14  and the orientation information acquired by the orientation sensor  16  in the memory portion  15  in association with the image identification information as related information (Step S 4 ). 
     Then, after writing the image data and the related information in the memory portion  15 , the control portion  11  transmits a search request signal that includes the camera identification information (user identification information assigned to a user or identification information assigned to a digital camera  1 ) for identifying the digital camera  1 , the position information, and the orientation information to the information search system  2  through the communication portion  12  (Step S 5 ). Alternatively, the control portion  11  can be configured to transmit the search request signal to the information search system  2  through the communication portion  12  without writing the image data, the related information, and the like in the memory portion  15  in the above-described Steps S 3  to S 5 . 
     Next, when the server  21  of the information search system  2  receives the above-described search request signal from the digital camera  1 , the server  21  extracts a building structure of a search target from the map data of the database  22  based on the position information and the orientation information that are included in the search request signal. Then, the server  21  transmits each type of information on the building structure table, which is included in the building structure table represented in  FIG.  2   , including the building structure identification information to the digital camera  1  as search result information including the building structure identification information (Step S 7 ). As an example, at this moment, the server  21  reads out the address of the digital camera  1  on the network which is added for a case where the search request signal is transmitted from the digital camera  1  through the communication portion  12  and transmits the search result information towards this address. Alternatively, in the above-described Step S 7 , the server  12  can be configured to extract the building structure of the search target from the map data of the database  22  based on the position information and the orientation information, which are included in the search request signal, only in a case where registration of the camera identification information included in the search request signal in the above-described user registration table that is stored in the database  22  is detected. In such a case, when the camera identification information included in the search request signal is detected not to be registered in the above-described user registration table, it is preferable that the server  21  transmits information indicating the need for user registration, for example, on the basis of the camera identification information to the digital camera  1 . 
     Then, when the control portion  11  of the digital camera  1  receives the above-described search result information from the information search system  2  through the communication portion  12 , as shown in  FIG.  5   , the control portion  11  displays the building information (relevant information on the object) in the information display field SP through the display portion  17  (Step S 8 ). For example, when the building structure is a restaurant, the information of the type of the restaurant (Chinese, Japanese, French. Italian, or the like) and a telephone number, an address, and the like of the restaurant are displayed. In addition, the information display field SP represented in  FIG.  5    is an example according to this embodiment, and the information display field SP can be displayed such that a part thereof is overlapped with the image of the restaurant. In addition, the information display field SP is a part of the image display field MP. The information display field SP is displayed, for example, by touching the above-described browsing icon  11 , a CM icon  12  to be described later, or the like for the selection. 
     In addition, when the user touches the CM icon  12 , the above-described peripheral circuit outputs a signal indicating the selection of the CM icon  12  to the control portion  11 . 
     Accordingly, the control portion  11  detects the selection of the CM icon  12  based on the input of the signal indicating the selection of the above-described CM icon  12  and displays commercial information (a menu, the number of seats, an image inside the restaurant, the day&#39;s specials, or the like) of the restaurant that is included in the search result information in the information display field SP through the display portion  17 . In addition, when the image data of the image inside the restaurant or the like is included in the commercial information, the control portion  11  displays the image data in the information display field SP. 
     In addition, when the user touches a post browsing icon  13 , the above-described peripheral circuit outputs a signal indicating the selection of the post browsing icon  13  to the control portion  11 . 
     Accordingly, the control portion  11  detects the selection of the post browsing icon  13  based on the input of the signal indicating the selection of the above-described post browsing icon  13  and displays the post information (comment) written by other users, which is included in the search result information, in the information display field SP through the display portion  17 . 
     When there is a plurality of the above-described post information, the control portion  11  displays the plurality of post information in the information display field SP, for example, in the order of the posted date. 
     The post information can include image data. Thus, when the image data of each food or the image data of the inside of the store that is taken by other users is included in the post information, the control portion  11  displays the image data in the information display field SP through the display portion  17 . 
     Then, for example, when detecting a signal indicating touch to be sled from the left end of the information display field SP toward the right side in  FIG.  5   , the control portion  11  ends display in the information display field SP and displays the image of the above-described restaurant in the image display field MP as shown in  FIG.  4    through the display portion  17 . In addition, for example, when detecting a signal indicating the selection of the positing browsing icon  13  in the middle of display of the post information in the information display field SP, the control portion  11  can be configured to end the display in the information display field SP or the display of the post information. 
     In addition, for example, when displaying the commercial information (or the post information) after displaying the building information in the information display field SP, the control portion  11  can be configured to display the commercial information together with the building information or to display the commercial information after removing the building information from the information display field SP. 
     In addition, when detecting a signal indicating touch of the image inside the store or the like that is displayed in the information display field SP, the control portion  11  displays an enlarged or reduced image of the image inside the store in the information display field SP (or the image display field MP). 
     In addition, when the user touches a mail icon  14 , the above-described peripheral circuit outputs a signal indicating the selection of the mail icon  14  to the control portion  11 . 
     Accordingly, the control portion  11  detects the selection of the mail icon  14  based on the input of the signal indicating the selection of the above-described mail icon  14  and displays an input field IP as shown in  FIG.  6    in a part of the image display field MP through the display portion  17 . Here, the input field IP is configured by a text field T to which the user inputs information or the like and a touch screen-type keyboard section K. This input field IP is used for the user to input the positing information, the name of the store, or the year to be described later. 
     The user inputs the post information such as a food eaten by him, the atmosphere inside the store, or the quality of service served by a store staff to the text field T of the input field IP by using the touch screen-type keyboard section K. Then, as the user touches the mail icon  14  again, the control portion  11  detects the selection of the mail icon  14 , sets the text information written in the text field T and the image data displayed in the image display field P together with the camera identification information and the building structure identification information as the post information, and transmits a search request signal including the post information to the information search system  2  through the communication portion  12 . 
     Then, when receiving the above-described search request signal from the digital camera  1 , the server  21  writes new post information that has been input to a post field of the building structure table of the database  22  in association with the building structure identification information. Alternatively, the server  21  can be configured to detect whether there is the camera identification information, which is included in the search request signal, in the user registration table of the database  22  before writing the post information, which is written in a post write field G 3 , in the post field of the building structure table of the database  22 . In such a case, the above-described post information can be configured to be written in the post field of the building structure table of the database  22  only in a case where registration of the camera identification information is detected. 
     Next, the control portion  11  detects whether a completion icon E is selected (Step S 9 ). 
     Here, when the user touches the completion icon E, the above-described peripheral circuit outputs a signal indicating the selection of the completion icon E to the control portion  11 . 
     Then, when detecting the selection of the completion icon E based on the input of the signal indicating the selection of the completion icon E, the control portion  11  completes the information searching process. 
     On the other hand, when the signal indicating the selection of the completion icon E is not input, and the selection of the completion icon E is not detected, the control portion  11  returns the process to Step S 1 , and the imaging process of the digital camera  1  and the information searching process are performed continuously. 
     When the browsing icon  11  is selected, the control portion  11  can be configured to control the search request signal to be transmitted to the information search system  2  so as to include the picked up image data. 
     Then, the server  21  can be configured to extract the characteristic amount from the image data by comparing peripheral image data of the building structure information found in the building structure table with the transmitted image data by using the building structure identification information of the building structure extracted from the map data by performing image recognition and to detect whether the similarity is equal to or more than a set value by comparing the characteristic amount extracted from the image data with that of the stored peripheral image data, whereby determining whether the image data corresponds to the building structure of which the image is taken. 
     At this moment, when the building structure of the peripheral image data and the building structure of the image data are determined not to be similar to each other as the result of comparison, the server  21  can be configured to extract a building structure that is the secondly closest from the above-described position from the map data based on the position information and the orientation information and to compare the characteristic amounts again, whereby the similarity between the peripheral image data of the newly extracted building structure and the image data of which image is taken is evaluated. 
     In addition, the browsing icon  11  according to this embodiment, similarly to the above-described imaging button B 1 , can be set up in the imaging apparatus  1  as a browsing button (not shown). In such a case, the function of the browsing button is the same as that of the above-described browsing icon  11 . In addition, the imaging button B 1  according to this embodiment can be configured to serve as the browsing button by operating a switch portion not shown in the figure. In such a case, the browsing icon  11  or the browsing button is not needed. 
     &lt;Information Search for Image after imaging by Using Digital Camera  1 &gt; 
     Next, the operation according to this embodiment will be described with reference to  FIGS.  1 ,  7 , and  4  to  6   .  FIG.  7    is a flowchart representing an operation example of an information searching process according to this embodiment in a case where image data stored in the memory portion  15  is read out after imaging an image of a building structure by using the digital camera  1 , and the information search for the image data is performed. 
     In description below, a case where a user searches for a dining restaurant while strolling around a downtown street of Shinjuku, takes images of image data of several restaurants, and then searches for a restaurant for dining out of the above-described restaurants is represented as an example. 
     When the user founds a restaurant having an exterior view for which an information search is desired to be performed and positions the digital camera  1  toward the restaurant having a favorite exterior view (Step S 11 ) while strolling around the downtown street, the user presses down the imaging button B 1  (shutter) set up in the digital camera  1  (Step S 12 ). Here, the control portion  11  displays the image data that is taken by the imaging portion  13 , that is, the image data of the restaurant of which the image is taken as shown in  FIG.  4   , in the image display field P of the display portion  17 . 
     Next, as the user presses down the imaging button B 1 , the peripheral circuit outputs a signal indicating press-down of the imaging button to the control portion  11 . 
     Then, the control portion  11  detects the press-down of the imaging button B 1  based on the input of the signal indicating press-down of the imaging button B 1 , assigns the image identification information to the image data of the restaurant of which the image is taken by the imaging portion  13 , and stores the image data and the time of imaging in the memory portion  15  in association with the image identification information (Step S 13 ). 
     Then, the control portion  11  writes the position information acquired by the GPS locator  14  and the orientation information acquired by the orientation sensor  16  at the time point when the imaging button B 1  is pressed down in the memory portion  15  in association with the image identification information for storage (Step S 14 ). 
     Next, when the user performs information collection of the restaurant of which the image is taken, the user touches a read-out icon R of the imaging. Accordingly the peripheral circuit outputs a signal indicating the selection of the read-out icon R to the control portion  11 . 
     Here, the control portion  11  determines whether an image is stored in the memory portion  15  based on the input of the signal indicating the selection of the read-out icon R (Step S 15 ). 
     At this moment, when the signal indicating the selection of the read-out icon R is input, the control portion  11  detects the selection of the read-out icon R, and the process proceeds to Step A 16  for starting an information search. In addition, the read-out icon R can be a read-out button (not shown). In such a case, it is preferable that the read-out button, similarly to the imaging button B 1 , is set up in the main body of the digital camera  1 . 
     On the other hand, when the signal indicating the selection of the read-out icon R has not been input or the image is not stored in the memory portion  15 , the control portion  11  returns to Step S 11  for performing a new imaging process. 
     Then, when receiving the signal indicating the selection of the icon R from the peripheral circuit by the user touching the read-out icon R as input, the control portion  1 I sequentially reads out image data from the memory portion  15  in the order of imaging in a time series (Step S 16 ) and displays the image data corresponding to a predetermined number set in advance as thumbnail images (or each image data) in the image display field MP through the display portion  17 . 
     In addition, in a case where the thumbnail images are not fit on one page (or one thumbnail image is displayed each time), when the user touches the image displayed in the image display field MP so as to be sled in a predetermined direction, a thumbnail image of the previous page or the next page is displayed in the image display field MP. At this moment, the control portion  11  displays thumbnail images of the previous page or the next page in the image display field MP through the display portion  17  in a case where the signal indicating touch of the image displayed in the image display field MP so as to be sled in the predetermined direction is detected. 
     Next, when the user selects an interesting image of a restaurant, for example, from among the thumbnail images by touching the image and additionally touches the browsing icon  11 , the peripheral circuit outputs the signal indicating the selection of the browsing icon  11  together with the selected image identification signal to the control portion  11 . 
     Accordingly, when receiving a signal indicating press-down of the browsing icon  11  as input, the control portion  11  reads out the position information and the orientation information corresponding to the image identification information from the memory portion  15  by using the image identification information of the selected image data and transmits a search request signal including the camera identification information, the position information, and the orientation information to the information search system  2  through the communication portion  12  (Step S 5 ). 
     The processes of the following Steps S 6  to S 8  are the same as those of Steps S 6  to S 8  represented in  FIG.  3   , and thus description thereof is omitted here. 
     Next, the control portion  11  detects whether the completion icon E is selected (Step S 18 ). 
     At this moment, the control portion  11  receives a signal indicating the selection of the completion icon E as input from the peripheral circuit by the user touching the completion icon E, the control portion  11  ends the browsing process. On the other hand, when not receiving the signal indicating the selection of the completion icon E as input, the control portion  11  returns the process to Step S 16 , and the process of selecting an image from among the thumbnail images is continued. 
     &lt;Information Search Using Store Information Input to Digital Camera  1 &gt; 
     Next, the operation according to this embodiment will be described with reference to  FIGS.  1 ,  8 , and  4  to  6   .  FIG.  8    is a flowchart representing an operation example of the information searching process according to this embodiment for a case where an information search is desired to be performed by user&#39;s inputting a store name to the digital camera  1  for a restaurant or the like having the input store name from the building structure table, represented in  FIG.  2   , corresponding to the store name that is stored in the database  22 . 
     In the following description, for example, is a case where the information on a restaurant in Harajuku from a known person is checked. 
     When the user selects a search icon  15  by touching the search icon  15 , the peripheral circuit outputs a signal indicating the selection of the search icon  15  to the control portion  11 . 
     Accordingly, the control portion  11  detects the selection of the search icon  15  based on the input of the signal indicating the selection of the search icon  15  and displays the input field IP as shown in  FIG.  6    in a part of the image display field MP through the display portion  17 . 
     Then, the user writes the store name of the restaurant desired to be searched for in the text field T of the input field IP by using the touch screen-type keyboard section K (Step S 21 ) and touches the search icon  15  again (Step S 22 ). 
     Accordingly, the peripheral circuit outputs text data (character data) of the store name that has been input to the text field T together with the signal indicating the selection of the search icon  15  to the control portion  11 . 
     Then, the control portion  11  detects the selection of the search icon  15  based on the input of the signal representing the selection of the search icon  15 , reads in the text data of the store name that has been input to the text field T. and transmits the search request signal together with the camera identification information to the information search system  2  through the communication portion  12  (Step S 23 ). 
     Next, when receiving the search request signal, the server  21  reads out the information (the store information and each information represented in the table represented in  FIG.  2   ) on the building structure (store) corresponding to the store name from the building structure table of the database  22  (Step S 24 ). 
     After reading in the store information, the server  21  transmits the acquired store information to the digital camera  1  (Step S 25 ). 
     When receiving the store information through the communication portion  12 , the control portion  11  displays building information in the information display field SP together with displaying the image data of the periphery of the store that is included in the building structure information in the image display field MP represented in  FIG.  5    through the display portion  17  (Step S 26 ). For example, the type (Chinese, Japanese, French, Italian, or the like) of the restaurant, the telephone number, and the like are displayed. 
     In addition, when the user selects a CM icon  12  by touching the CM icon  12 , the control portion  11  detects the selection of the CM icon  12  and displays commercial information (a menu, a chef&#39;s today&#39;s special, or the like) of the restaurant included in the search result information in the information display field SP through the display portion  17 . 
     In addition, when the user selects the post browsing icon  13 , by touching the post browsing icon  13 , the peripheral circuit outputs a signal representing the selection of the post browsing icon  13  to the control portion  11 . 
     The control portion  11  detects the selection of the post browsing icon  13  based on the input of the signal indicating the selection of the post browsing icon  13  and displays the post information written by other users which is included in the search result information in the display field SP through the display portion  17 . 
     When there is a plurality of the post information, the control portion  11  sequentially displays the plurality of the post information in the information display field SP through the display portion  17 . In addition, when image data is also included in the post information, the control portion  11  displays the image data in the information display field SP through the display portion  17 . 
     Then, the control portion  11  detects whether the completion icon E has been selected (Step S 27 ). The detection of the selection of the completion icon E is the same as the process of Step S 9  in “&lt;Searching for Information on Imaging By Digital Camera  1 &gt;”, and thus, description thereof is omitted here. 
     At this moment, when receiving the signal indicating the selection of the completion icon E as input by user&#39;s touching the completion icon E from the peripheral circuit, the control portion  11  ends the browsing process. On the other hand, when not receiving the signal indicating the selection of the completion icon E, the control portion  11  returns the process to Step S 21  so as to continue to perform an information search for the store. 
     &lt;Charging Process for Store Registered in Database  22 &gt; 
     In a case where the above-described building structure is a store (including a restaurant, or a company), the building structure table of the database  22  can be configured such that discount coupon data is stored for each store. 
     In addition, the server  21  transmits the search result information to which the discount coupon information is added to the digital camera  1 . 
     When the user goes dining or shopping by using the discount coupon information, the server  21  detects whether the user has dined or shopped based on whether the discount coupon information has been used. For example, in a case where the above-described coupon information is a bar code (including a two-dimensional bar code) or the like displayed in the information display field SP of the digital camera  1 , a reading portion of the store reads out the bar code and transmits use information indicating the use of the discount coupon information together with the camera identification information, which is transmitted from the digital camera  1 , and shopping (or dining) charge to the information search system  2 . 
     Accordingly, when receiving the use information, the server  21  reads out the history information corresponding to the camera identification information added to the use information from the database  22  and differently charges the store with an information providing fee depending on the level of information use out of a level in which the store is used by performing an information search, a level in which the store is used by viewing the provided information on the store, and a level in which the store is used by viewing the post information, that is, the degree of use of the information of the database  22 . In addition, the server  21  writes the level of the information search and the history of the use of the discount coupon information for each camera identification information in the history table that is stored in the database  22 . 
     This bar code includes the building structure identification information that represents a store. In the database  22 , a charge table, in which the history of charging and an accumulated value of charging corresponding to each store are stored in association with the building construction identification information, is set up. 
     Then, the server  21  writes the amount of usage and a charge corresponding to the level of information use as the history in the charge table in association with the building structure identification information and adds the new charge to the accumulated value so as to update the accumulated value. 
     &lt;Process of Adding Points to User&gt; 
     Each time the user uses the discount coupon information at the store, the server  21  calculates points corresponding to the amount of usage (for example, calculated by multiplying the amount of usage by a point coefficient) for a case where the discount coupon information is used and accumulates the calculated points in the user registration table of the database  22  in association with the camera identification information. 
     In addition, the server  21  accumulates points corresponding to a value set in advance for a user who has transmitted the post information in the user registration table in association with the camera identification information. 
     The above-described points can be used, instead of money, together with the discount coupon information in paying the charge. 
     &lt;Display Order of Post Information&gt; 
     Here, the server  21  can be configured to allow the digital camera  1  to transmit a nickname and a title as the post information together with the post identification information in the initial stage. 
     Then, the control portion  11  initially displays only a plurality of nicknames and a plurality of titles in the information display field SP. Then, the user selects the nickname and the title of the post information desired to be known from among the plurality of the nick names and the titles displayed by touching the nick name and the title of the post information. Accordingly, the peripheral circuit transmits the signal indicating of the selection of the nickname and the title and the post identification information of the selected post information to the control portion  11 . 
     Accordingly, the control portion  11  transmits a post information transmission request together with the post identification information to the information search system  2 . 
     Accordingly, the server  21  transmits the text data (character data) and the image data (the entire post information) corresponding to the transmitted post identification information to the digital camera  1 . 
     Here, the server  21  assigns the positing identification information that is used for identification for each of the post information and writes the post information in the user registration table in association with the camera identification information for storage. 
     In addition, in this embodiment, the control portion  11  can be configured to display the text data in the information display field SP and display the image data in the image display field MP when receiving the text data and the image data from the information search system  2  through the communication portion  12 . 
     In addition, the server  21  searches for the post identification information corresponding to the referred post information from the user registration table and increments the number of references for the camera identification information corresponding to the post identification information in the user registration table. 
     Then, in the initial display stage of the nickname and the title in which the user can select the post information, the server  21  transmits a display list, in which the nicknames and the titles are displayed in the descending order of the number of times of the selection of the post information, that is, the nickname and the title having more number of times of references comes first to be displayed in the information display field SP to the digital camera  1 . 
     Accordingly, the control portion  11  sequentially displays the nicknames and the titles in the information display field SP in accordance with the display list. 
     &lt;Process of Displaying Past Image Data&gt; 
     In addition, according to this embodiment, the database  22  can be configured to have a past image table in which image data acquired by photographing buildings and landscapes at each latitude and each longitude are photographed for each year is stored in association with the latitude and the longitude. 
     When the user selects the past image icon  16  by touching the past image icon  16 , the above-described peripheral circuit outputs a signal indicating the selection of the past image icon  16  to the control portion  11 . 
     Accordingly, the control portion  11  detects the selection of the past image icon  16  based on the input of the signal indicating the selection of the past image icon  16  and displays an input field IP as represented in  FIG.  6    in a part of the image display field MP through the display portion  17 . 
     Then, after writing the year (for example, the dominical year) in the text field T by using the touch screen-type keyboard section K, the user touches the past image icon  16  (or the browsing icon  11 ). 
     Accordingly, the peripheral circuit transmits the text data of the year together with the signal indicating the selection of the past image icon  16  to the control portion  11 . 
     When detecting the signal indicating the selection of the past image icon  16 , the control portion  1 I reads in the text data representing the year written in the text field T. After reading in the data for the year, the control portion  11  transmits the past image search request together with the read year, the position information, the orientation information, and the camera identification information to the information search system  2 . 
     Next, in the information search system  2 , the server  21  selects the past image table corresponding to the latitude and the longitude on the basis of the position information of the building structure that is received from the digital camera  1  and is displayed in the image display field P. Then, the server  21  reads in the image data corresponding to the orientation information and the year in the selected past image table and transmits the read image data to the digital camera  1 . The digital camera  1  displays the image data corresponding to the year received from the server  21  in the image display field MP through the display portion  17 . In addition, in a case where the information or the like for the read-out image is added, the server  21  transmits the added information together with the read-out image data to the digital camera  1 . 
     Accordingly, the user can acquire information indicating that there is a specific building structure for each year in the past or there is only the landscape without any building structure for each year in the past. 
     Here, when the past image table of the corresponding latitude and the longitude cannot be found, the server  21  searches for the past image table that is located at the latitude and the longitude in the direction of the orientation information and is closest to the latitude and the longitude and extracts the image data therefrom. 
     In addition, for an era without a photo, a landscape that had lasted in the era or image data of CG (computer graphics) generated by imagination can be stored for each year in the past image table of the memory portion  15  in association with the year, instead of the image data of a photo. 
     An embodiment relates to an imaging apparatus that has a function of acquiring information on an imaging position of a subject and associating the subject and the information on the imaging position at the time of imaging the subject, and an information acquisition system that acquires information on the subject by using the information on the imaging position. 
     In the embodiment, the orientation information (for example, an azimuth angle) for acquiring the direction in which the user photographs the subject at the photographing position can be acquired. 
     In the embodiment, the information on the subject that is photographed by the user, for example, the type of a building structure can be acquired easily. 
     In the embodiment, not only the position information of the imaging position in which the user photographs a subject but also the orientation information representing the direction, in which the user takes an image of the subject from the position represented by the position information that is acquired by the position information acquisition portion, can be acquired. Accordingly, the orientation of the photographed subject, that is, the direction in which the user disposes the imaging apparatus can be determined. 
     In the embodiment, the position information and the orientation information obtained by imaging a subject can be acquired. Accordingly, the information on a building structure as a subject of which the image is taken by the user by using the imaging apparatus can be easily acquired by searching a database by using the position information and the orientation information acquired by imaging.