Patent Publication Number: US-2017367151-A1

Title: Cooking support method and cooking support system

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a cooking support method and a cooking support system. 
     2. Description of the Related Art 
     There has been proposed a method of detecting boiling over of a content from cookware such as a pot. For example, there has been disclosed a method of equipping a weight detector to an electromagnetic cooking heater, also called an induction heating (IH) cooking heater, which operates only with electricity without using gas or fire, and detecting boiling over from a cookware heated by the electromagnetic cooking heater based on the position of the center of gravity of and a change in weight of the cookware. 
     However, the above conventional technique has a problem that such boiling over from the cookware cannot be dealt with only after the actual occurrence thereof. Therefore, it is troublesome to wipe off and clean up the content and the like which have boiled over onto the electromagnetic cooking heater. 
     SUMMARY 
     In one general aspect, the techniques disclosed here feature a cooking support method for a cooking support system which is connected through a network to a thermal image camera that takes a thermal image of a region including a cookware during cooking and to a notification device capable of notifying the user of information, and which supports cooking by a user, comprising: acquiring, through the network from the thermal image camera, a thermal image of the region including the cookware at predetermined time intervals taken from the obliquely above the cookware by the thermal image camera; calculating a value indicating a change in level of a content in the cookware from the acquired thermal image; determining whether or not the calculated value indicating the change in level is not less than a predetermined threshold; determining that there is a possibility of the content boiling over the cookware during cooking when it is determined that the calculated value indicating the change in level is not less than the predetermined threshold; and transmitting notification information indicating information notifying the user that there is the possibility of boiling over to the notification device. 
     These general and specific aspects may be implemented using a system, a method, and a computer program, and any combination of systems, methods, and computer programs. 
     According to the present disclosure, a cooking support method and a cooking support system can be provided, which can prevent boiling over from cookware by detecting occurrence thereof beforehand. 
     Additional benefits and advantages of the disclosed embodiments will become apparent from the specification and drawings. The benefits and/or advantages may be individually obtained by the various embodiments and features of the specification and drawings, which need not all be provided in order to obtain one or more of such benefits and/or advantages. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a conceptual diagram showing an example of an overall configuration of Embodiment 1; 
         FIG. 2  is a conceptual diagram showing a positional relationship between a thermal image camera and a cookware shown in  FIG. 1 ; 
         FIG. 3  is a block diagram showing a configuration example of a cooking support system according to Embodiment 1; 
         FIG. 4  is a flowchart showing an example of operations of the cooking support system according to Embodiment 1; 
         FIG. 5  is a flowchart showing an example of specific operations of S 3  in  FIG. 4 ; 
         FIG. 6  is a flowchart showing an example of specific operations of S 5  in  FIG. 4 ; 
         FIG. 7  is a diagram showing an example of a hot portion in the cookware according to Embodiment 1; 
         FIG. 8A  is a diagram showing an example of a hot portion in a cookware according to a comparative example; 
         FIG. 8B  is a diagram showing an example of the hot portion in the cookware according to the comparative example; 
         FIG. 9  is a block diagram showing a configuration example of a cooking support system according to Embodiment 2; 
         FIG. 10  is a block diagram showing a configuration example of the cooking support system according to Embodiment 2; 
         FIG. 11  is a flowchart showing an example of operations of the cooking support system according to Embodiment 2; 
         FIG. 12  is a flowchart showing an example of specific operations of S 4  in  FIG. 11 ; 
         FIG. 13  is a flowchart showing an example of specific operations of S 5 A in  FIG. 11 ; 
         FIG. 14  is a thermal image showing an example of how boiling over occurs when the cookware has a lid on in Embodiment 2; 
         FIG. 15  is a thermal image showing an example of how boiling over occurs when the cookware has a lid on in Embodiment 2; 
         FIG. 16  is a block diagram showing a configuration example of a cooking support system according to Embodiment 3; 
         FIG. 17  is a flowchart showing an example of operations of the cooking support system according to Embodiment 3; 
         FIG. 18  is a flowchart showing an example of specific operations of S 12  in  FIG. 17 ; 
         FIG. 19  is a diagram for explaining a region-by-region thermal image generated in S 12  in  FIG. 17 ; 
         FIG. 20  is a flowchart showing an example of specific operations of S 2 B in  FIG. 17 ; and 
         FIG. 21  is a flowchart showing an example of specific operations of S 3 B in  FIG. 17 . 
     
    
    
     DETAILED DESCRIPTION 
     Underlying Knowledge Forming Basis of the Present Disclosure 
     There has been proposed a method of detecting boiling over of a content from a cookware such as a pot (see, for example, Japanese Unexamined Patent Application Publication No. 2013-72637 (JP2013-72637A)). 
     JP2013-72637A discloses a method of equipping a weight detector to an electromagnetic cooking heater which operates only with electricity without using gas or fire, and detecting boiling over from a cookware heated by the electromagnetic cooking heater based on the position of the center of gravity of and a change in weight of the cookware. 
     However, the technique disclosed in JP2013-72637A has a problem that such boiling over from the cookware cannot be dealt with only after the actual occurrence thereof. Therefore, it is troublesome to wipe off and clean up the content and the like which have boiled over onto the electromagnetic cooking heater. 
     Meanwhile, Japanese Unexamined Patent Application Publication No. 2007-303804 (JP2007-303804A) discloses, for example, a method of using an infrared sensor to detect the temperature of a cookware, and thereby detecting boiling over from a cookware heated by an electromagnetic cooking heater before the occurrence thereof. 
     However, the technique disclosed in JP2007-303804A has a problem that only surface temperature information on one side of the cookware can be acquired due to a positional relationship between the installation position of the infrared sensor and the position where the cookware is placed. Therefore, if the cookware is a stainless steel pot, temperature information on the content cannot be acquired with the infrared sensor. Moreover, the technique disclosed in JP2007-303804A also has a problem that, since a sensor to detect the cookware is installed in addition to the infrared sensor to detect the temperature of the cookware, it is difficult to install and set these sensors and thus introduction thereof is not realistic. 
     In consideration of the above problems, the inventors have conceived the aspects disclosed below. 
     (1) A cooking support method according to aspect of the present disclosure provides a cooking support method for a cooking support system which is connected through a network to a thermal image camera to take a thermal image of a region including a cookware during cooking and to a notification device capable of notifying the user of information, and which supports cooking by a user, including: acquiring, through the network from the thermal image camera, a thermal image of the region including the cookware at predetermined time intervals taken from the obliquely above the cookware by the thermal image camera; calculating a value indicating a change in level of a content in the cookware from the acquired thermal image; determining whether or not the calculated value indicating the change in level is not less than a predetermined threshold; determining that there is a possibility of the content boiling over the cookware during cooking when it is determined that the calculated value indicating the change in level is not less than the predetermined threshold; and transmitting notification information to the notification device, the notification information indicating information notifying the user that there is the possibility of boiling over. 
     According to this aspect, a cooking support method and a cooking support system can be provided, which can prevent boiling over from cookware by detecting occurrence thereof beforehand. 
     (2) In the described-above aspect, the cooking support system may be further connected through the network to a cooking heater that enables cooking with the cookware, the cooking support method may further include transmitting a control signal indicating an instruction to lower an output of the cooking heater to the cooking heater when it is determined that the calculated value indicating the change in level is not less than the predetermined threshold. 
     (3) In the described-above aspect, the control signal may indicate an instruction to stop a cooking operation by the cooking heater. 
     (4) In the described-above aspect, the cooking support method may further include calculating a value indicating a change in area of a predetermined temperature region that is a region having a predetermined temperature or higher in the thermal image of the cookware acquired at the predetermined time intervals, as the value indicating the change in level. 
     (5) In the described-above aspect, the cooking support method may further include determining whether or not there is a lid on the cookware during cooking based on the thermal image; when it is determined that there is no lid, determining whether or not the value indicating the change in level is not less than the predetermined threshold; and when it is determined that there is the lid, detecting an outside edge of the lid of the cookware based on the thermal image, calculating a value of a temperature change in the outside edge as the value indicating the change in level, and determining whether or not the value of the temperature change in the outside edge is not less than a predetermined threshold. 
     (6) In the described-above aspect, the cooking support method may further include calculating a value indicating a change in area of a region having a predetermined temperature or higher at and around the outside edge in the thermal image of the cookware at the predetermined time intervals, as the value of the temperature change in the outside edge. 
     (7) In the described-above aspect, the cooking support method may further include checking if the region of the acquired thermal image includes a human temperature region that is a temperature region indicating a human in a background region other than a cookware region that is a specific region including the cookware; and resetting the value indicating the change in level when it is confirmed that there is the human temperature region in the background region. 
     (8) In the described-above aspect, the notification device may be portable by the user and includes a display viewable by the user, and the cooking support method may further include transmitting the notification information through an e-mail to the notification device when it is determined that the calculated value indicating the change in level is not less than the predetermined threshold. 
     (9) A cooking support method according to aspect of the present disclosure provides a cooking support system which is connected through a network to a thermal image camera to take a thermal image of a region including a cookware during cooking and to a notification device capable of notifying the user of information, and which supports cooking by a user, including: a data acquirer that acquires, through the network from the thermal image camera, a thermal image of the region including the cookware at predetermined time intervals taken from the obliquely above the cookware by the thermal image camera; a change calculator that calculates a value indicating a change in level of a content in the cookware from the acquired thermal image; a boil-over determiner that determines whether or not the calculated value indicating the change in level is not less than a predetermined threshold, and determines that there is a possibility of the content boiling over the cookware during cooking when it is determined that the calculated value indicating the change in level is not less than the predetermined threshold; and a notifier that transmits notification information indicating information notifying the user that there is a possibility of boiling over to the notification device when the boil-over determiner determines that there is the possibility of the content boiling over. 
     It should be noted that general or specific embodiments may be implemented as a system, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, and may be realized by any combination of a system, a method, an integrated circuit, a computer program, and a recording medium. 
     With reference to the drawings, specific description is given below of a cooking support method and the like according to one embodiment of the present disclosure. Note that embodiments described below are all specific examples of the present disclosure. Values, shapes, materials, components, placements of components, and the like described in the following embodiments are only exemplary, and do not restrict the present disclosure. Components in the following embodiments which are not included in an independent claim indicating the highest concept are described as being optional components. cl Embodiment 1 
     [Overall Configuration] 
     With reference to the drawings, a cooking support system according to Embodiment 1 is described below. 
       FIG. 1  is a conceptual diagram showing an example of an overall configuration of Embodiment 1.  FIG. 2  is a conceptual diagram showing a positional relationship between a thermal image camera  2  and a cookware  5  shown in  FIG. 1 . 
     A cooking support system  1  is connected to the thermal image camera  2 , a cooking heater  3 , and a notification device  6  through a network  7  as shown in  FIG. 1 , and supports cooking by a user with the cookware  5 . 
     The cooking heater  3  is a device that enables cooking with the cookware  5 . The cooking heater  3  is, for example, an IH cooking heater that cooks the content in the cookware  5  by operating only with electricity, without using gas or fire, to heat the cookware  5 . Note that the cooking heater  3  is not limited to the IH cooking heater but may also be a cooking heater that performs cooking with the cookware  5  by using gas or fire if the cooking heater can stop cooking according to a control signal from the cooking support system  1  as described later. 
     The cookware  5  is, for example, a pot or the like, having its content cooked by the cooking heater  3 . 
     The thermal image camera  2  is installed to be able to take a thermal image from obliquely above the cookware  5 , and takes a thermal image of a region including the cookware  5  during cooking of the content. In this embodiment, the thermal image camera  2  is attached to a kitchen stove hood  4  or the like, for example, above the cooking heater  3  as shown in  FIG. 2 , and thus installed to be able to take a thermal image from obliquely above the cookware  5 . Also, the thermal image camera  2  takes a thermal image of the region including the cookware  5  at predetermined time intervals. 
     The notification device  6  is a device capable of notifying the user of information. In this embodiment, the notification device  6  is a portable device that can be carried by the user and includes a display viewable by the user, such as a smartphone and a cell-phone, for example. Note that the notification device  6  is not limited to such a device that can be carried by the user and includes the display viewable by the user, but may also be a sound generator capable of notifying the user of information such as an alert by generating a sound. 
     The network  7  is a network such as a wireless communication network such as Bluetooth (registered trademark) and Wi-Fi or a wireless or wired LAN. 
     [Configuration of Cooking Support System  1 ] 
       FIG. 3  is a block diagram showing a configuration example of the cooking support system  1  according to this embodiment. 
     As shown in  FIG. 3 , the cooking support system  1  includes a boil-over detector  10 , a notifier  20 , and a heating controller  30 . 
     When the boil-over detector  10  detects the possibility of boiling over (occurrence of boiling over), the notifier  20  transmits notification information indicating information notifying the user of the possibility of boiling over. In this embodiment, for example, the notifier  20  transmits the notification information indicating the possibility of boiling over through e-mail, for example, to the notification device  6 . 
     When the boil-over detector  10  detects the possibility of occurrence of boiling over, the heating controller  30  transmits a control signal indicating an instruction to lower the output of the cooking heater  3  to the cooking heater  3 . Here, the control signal may indicate an instruction to stop a heating operation by the cooking heater, for example. 
     [Configuration of Boil-Over Detector  10 ] 
     As shown in  FIG. 3 , the boil-over detector  10  includes a data acquirer  11 , a hot portion detector  12 , a cookware detector  13 , a storage  14 , a change calculator  15 , and a boil-over determiner  16 . The boil-over detector  10  detects the possibility of the content boiling over the cookware  5  based on the thermal image acquired from the thermal image camera  2 . 
     The data acquirer  11  acquires the thermal image of the region including the cookware  5  at predetermined time intervals from the thermal image camera  2 . 
     The cookware detector  13  detects whether or not there is the cookware  5 , based on the thermal image acquired by the data acquirer  11 . In this embodiment, the cookware detector  13  performs image processing of binarizing and smoothing the thermal image acquired by the data acquirer  11  and then performs detection processing of detecting an edge of the cookware  5  in the thermal image subjected to the image processing, thereby detecting whether or not there is the cookware  5 . When having succeeded in the detection processing, the cookware detector  13  stores positional information on the cookware  5  in the thermal image acquired by the data acquirer  11  and temperature information that can be acquired from the thermal image of the cookware  5  in the storage  14 . 
     The hot portion detector  12  detects a hot portion of the cookware  5  from the thermal image acquired by the data acquirer  11 . In this embodiment, the hot portion detector  12  detects a hot region having 70° C. or higher, for example, in the thermal image acquired by the data acquirer  11 , and stores the detected hot region as temperature information in the storage  14 . 
     The storage  14  includes, for example, an SD card or a flash memory, and stores the temperature information (thermal image of the hot region) described above and positional information on the cookware  5  in the thermal image acquired by the data acquirer  11 . 
     The change calculator  15  calculates a value indicating a change in level of the content in the cookware  5  from the thermal image acquired by the data acquirer  11 . Here, as the value indicating a change in level, for example, the change calculator  15  calculates a value indicating a change in area of a predetermined temperature region that is a region having a predetermined temperature or higher in the thermal image of the cookware  5  acquired at predetermined time intervals. In this embodiment, the change calculator  15  detects the content level in the cookware  5  from the hot region having 70° C. or higher, for example, in the cookware  5  within the thermal image detected by the cookware detector  13 . Then, the change calculator  15  calculates a difference distance between the detected content level (upper edge of the hot region) in the cookware  5  and the edge (upper edge) of the cookware  5  detected by the cookware detector  13 . The change calculator  15  stores information (upper edge of the hot region) indicating the detected content level and the calculated difference distance in the storage  14 . When information indicating the content level detected a predetermined time ago is stored in the storage  14 , the change calculator  15  calculates an increase in the detected content level. Here, as the increase in content level, the change calculator  15  calculates an increase indicating a change in area of the hot region that is a region having 70° C. or higher, for example, in the thermal image of the cookware  5  acquired at predetermined time intervals. 
     Note that, as the value indicating a change in content level in the cookware  5 , the change calculator  15  may also calculate a ratio of the hot region of the thermal image indicating the content in the cookware  5  to the region of the thermal image indicating the cookware  5 . 
     The boil-over determiner  16  determines whether or not the value indicating a change in level calculated by the change calculator  15  is not less than a predetermined threshold. When determining that the value indicating a change in level calculated by the change calculator  15  is not less than the predetermined threshold, the boil-over determiner  16  determines that there is the possibility of the content boiling over the cookware  5  during cooking. In this embodiment, the boil-over determiner  16  determines whether or not the increase calculated by the change calculator  15  is not less than a predetermined threshold (hereinafter referred to as the first threshold). When determining that the increase calculated by the change calculator  15  is not less than the first threshold, the boil-over determiner  16  determines that there is the possibility of the content boiling over the cookware  5  during cooking. 
     Note that, when determining that the increase calculated by the change calculator  15  is not less than the first threshold, the boil-over determiner  16  may further determine whether or not the calculated increase is not less than a second threshold. When determining that the calculated increase is not less than the second threshold, the boil-over determiner  16  may determine boil-over occurrence, meaning that the content is to actually boil over the cookware  5  during cooking within a few seconds, for example. On the other hand, when determining that the calculated increase is less than the second threshold, the boil-over determiner  16  may determine boil-over anticipation, meaning that there is the possibility of the content boiling over the cookware  5  during cooking within several ten seconds to several minutes, for example. 
     Note that, as described above, the change calculator  15  may calculate the ratio of the hot region of the thermal image indicating the content in the cookware  5  to the region of the thermal image indicating the cookware  5 , as the value indicating a change in content level in the cookware  5 . In this case, the boil-over determiner  16  may determine the boil-over anticipation, when the hot region of the thermal image indicating the content in the cookware  5  during cooking is 50% to 80% of the region of the thermal image indicating the cookware  5 . Also, the boil-over determiner  16  may determine the boil-over occurrence, when the hot region of the thermal image indicating the content in the cookware  5  during cooking exceeds 80% of the region of the thermal image indicating the cookware  5 . 
     [Operations of Cooking Support System  1 ] 
     Next, description is given of operations of the cooking support system  1  configured as described above. 
       FIG. 4  is a flowchart showing an example of operations of the cooking support system  1  according to Embodiment 1. 
     First, the cooking support system  1  performs thermal image acquisition processing to acquire a thermal image of a region including the cookware  5  at the predetermined time intervals from the thermal image camera  2  through the network  7  (S 1 ). 
     Next, the cooking support system  1  performs cookware detection processing to detect the cookware  5  based on the thermal image acquired in S 1  (S 3 ). Here, with reference to  FIG. 5 , the cookware detection processing is described in detail.  FIG. 5  is a flowchart showing an example of specific operations of S 3  in  FIG. 4 . 
     As shown in  FIG. 5 , the cooking support system  1  first performs binarization processing on the acquired thermal image (S 32 ) and then performs smoothing processing (S 33 ). Note that the image processing such as the binarization processing and the smoothing processing is the known processing, and thus description thereof is omitted here. Next, the cooking support system  1  performs detection processing to detect the edge of the cookware  5  in the thermal image subjected to the image processing in S 32  and S 33  (S 34 ). Here, if the cookware  5  is a pot, for example, the edge thereof is circular, for example. More specifically, the edge of the cookware  5  can be detected based on edge characteristics of the cookware  5 , such as circular, oval, and linear. Note that, even if there is more than one cookware  5 , the edges thereof can be detected based on their respective edge characteristics. Then, when having succeeded in the edge detection processing on the cookware  5  (Yes in S 35 ), the cooking support system  1  stores positional information in the acquired thermal image on the cookware  5  (concerned cookware  5 ) whose edge has been successfully detected as well as temperature information that can be acquired from the thermal image of the concerned cookware  5  in the storage  14  (S 36 ). Here, the temperature information stored in the storage  14  may be a thermal image at a position corresponding to the concerned cookware  5 . Note that, when having failed in the edge detection processing on the cookware  5  (No in S 35 ), the cooking support system  1  returns to S 1  to start over from the thermal image acquisition processing. 
     Next, the cooking support system  1  performs boil-over determination processing (S 5 ). Here, with reference to  FIG. 6 , the boil-over determination processing is described in detail.  FIG. 6  is a flowchart showing an example of specific operations of S 5  in  FIG. 4 .  FIG. 7  is a diagram showing an example of hot portions in cookwares according to Embodiment 1.  FIGS. 8A and 8B  are diagrams showing an example of hot portions in cookwares according to a comparative example. In  FIGS. 7 to 8B , a cookware  51  and a cookware  52  are each an example of the cookware  5 , and represent a stainless steel pot and an enamel pot, respectively. 
     As shown in  FIG. 6 , the cooking support system  1  first detects the level of the content from the hot portion in the cookware  5 , based on the thermal image acquired in S 1  (S 51 ). As shown in  FIG. 7 , for example, the cooking support system  1  can detect the levels of the contents in the cookwares  51  and  52  from the hot regions (hatched portions in  FIG. 7 ) of 70° C. or higher, for example, in the cookwares  51  and  52  (in the pots) within the thermal image detected in S 3 . The thermal image camera  2  is installed to be able to take a thermal image from obliquely above the cookwares  51  and  52 , and takes a thermal image of the region including the cookwares  51  and  52  during cooking. Therefore, the levels of the contents in the cookwares  51  and  52  can be detected from the peripheries of the hot regions of 70° C. or higher. On the other hand, in a thermal image of the comparative example taken from the side of the cookwares  51  and  52  as shown in  FIG. 8A , for example, the hot region (hatched portion in  FIG. 8A ) of 70° C. or higher can be recognized from the cookware  52  that is the enamel pot, and thus the content level can be detected. However, since no hot region having 70° C. or higher can be recognized from the cookware  51  that is the stainless steel pot, and thus the content level cannot be detected. On the other hand, in a thermal image of the comparative example taken from above the cookwares  51  and  52  as shown in  FIG. 8B , for example, the hot regions (hatched portions in  FIG. 8B ) of 70° C. or higher can be recognized from the cookwares  51  and  52 . However, there is no difference in height between the peripheries of the hot regions and the edges of the cookwares  51  and  52 . Therefore, the content levels thereof cannot be accurately detected. 
     Next, the cooking support system  1  calculates a difference distance between the content level in the cookware  5  detected in S 51  and the edge (upper edge) of the cookware  5  (S 52 ). In this embodiment, the cooking support system  1  calculates a difference distance between the periphery of the hot region having 70° C. or higher indicating the content level in the cookware  5  detected in S 51  and the edge of the cookware  5  indicated by the positional information on the cookware  5  detected in S 3  and stored in the storage  14 . 
     Then, the cooking support system  1  checks if information indicating the content level detected a predetermined time ago is stored in the storage  14  (S 53 ). Here, the information indicating the content level detected a predetermined time ago is, for example, a thermal image indicating the periphery of the hot region having 70° C. or higher. Note that, when it is confirmed that the information indicating the content level detected a predetermined time ago is not stored in the storage  14  (No in S 53 ), the cooking support system  1  stores the information indicating the content level detected in S 51  and the difference distance calculated in S 52  in the storage  14  (S 55 ). 
     On the other hand, when it is confirmed in S 53  that the information indicating the content level detected a predetermined time ago is stored in the storage  14  (Yes in S 53 ), the cooking support system  1  calculates an increase in the content level detected in S 51  (S 54 ). Here, the increase in the content level detected in S 51  corresponds to a value indicating a change in the content level in the cookware  5 , and is calculated from an increase indicating a change in area of the hot region having 70° C. or higher, for example, in each of the thermal images of the cookware  5  acquired at the predetermined time intervals. 
     Thereafter, the cooking support system  1  determines whether or not the increase calculated in S 54  is not less than a first threshold (predetermined threshold) (S 56 ). Note that, when the increase calculated in S 54  is less than the first threshold (No in S 56 ), the cooking support system  1  moves to S 55  to store the information indicating the content level detected in S 51  and the difference distance calculated in S 52  in the storage  14 . 
     On the other hand, when it is determined in S 56  that the increase calculated in S 54  is not less than the first threshold (Yes in S 56 ), the cooking support system  1  determines that there is the possibility of the content boiling over the cookware  5  during cooking, and further determines whether or not the increase calculated in S 54  is not less than a second threshold (S 57 ). 
     When it is determined that the increase calculated in S 54  is not less than the second threshold (Yes in S 57 ), the cooking support system  1  determines boil-over occurrence (S 58 ). Here, as described above, the boil-over occurrence means that the content is to boil over the cookware  5  during cooking within a few seconds, for example. On the other hand, when it is determined that the increase calculated in S 54  is less than the second threshold (No in S 57 ), the cooking support system  1  determines boil-over anticipation (S 59 ). Note that the boil-over anticipation means that there is a risk (possibility) of the content boiling over the cookware  5  during cooking within several ten seconds to several minutes, for example. 
     Hereinafter, further description is given referring back to  FIG. 4 . 
     Next, when it is determined in S 5  that there is the possibility of boiling over, the cooking support system  1  performs notification processing to transmit notification information indicating information notifying the user of the possibility of boiling over to the notification device  6  (S 7 ). 
     Then, when it is determined in S 5  that there is the possibility of boiling over, the cooking support system  1  performs heating control processing to transmit a control signal indicating an instruction to lower the output of the cooking heater  3  to the cooking heater  3  (S 9 ). Here, with reference to  FIG. 9 , the heating control processing is described in detail.  FIG. 9  is a flowchart showing an example of specific operations of S 9  in  FIG. 4 . 
     As shown in  FIG. 9 , the cooking support system  1  first checks if the boil-over occurrence has been determined in the boil-over determination processing in S 5  (S 91 ). 
     When it is confirmed in S 91  that the boil-over occurrence has been determined (Yes in S 91 ), the cooking support system  1  stops the heating operation by the cooking heater  3  (S 92 ) and notifies the user of the cooking heater  3  that boiling over will occur (S 93 ). In this embodiment, the cooking support system  1  transmits a control signal indicating an instruction to stop the heating operation by the cooking heater  3  to the cooking heater  3 , thereby stopping the heating operation by the cooking heater  3 . Also, the cooking support system  1  notifies the user that boiling over will occur by transmitting notification information indicating information notifying the user that boiling over will occur to the notification device  6 . Note that the cooking support system  1  may perform either S 92  or S 93  first. 
     On the other hand, when it is confirmed in S 91  that the boil-over occurrence has not been determined (No in S 91 ), the cooking support system  1  checks if the boil-over anticipation has been determined in the boil-over determination processing in S 5  (S 94 ). When it is confirmed in S 94  that the boil-over anticipation has been determined (Yes in S 94 ), the cooking support system  1  controls the heat of the cooking heater  3  (S 95 ) and notifies the user of the cooking heater  3  of the boil-over anticipation (S 96 ). In this embodiment, the cooking support system  1  transmits a control signal indicating an instruction to lower the output of the cooking heater  3 , thereby controlling the heat of the cooking heater  3 . Also, the cooking support system  1  transmits notification information indicating information notifying the user of the boil-over anticipation to the notification device  6 , thereby notifying the user of the boil-over anticipation. Note that the cooking support system  1  may perform either S 95  or S 96  first. On the other hand, when it is confirmed in S 94  that the boil-over anticipation has not been determined (No in S 94 ), the cooking support system  1  moves to S 1  to start over from the thermal image acquisition processing. 
     [Advantageous Effects and the Like of Embodiment 1] 
     As described above, the cooking support system and the cooking support method according to this embodiment can prevent the content in the cookware  5  from boiling over by detecting occurrence thereof beforehand, regardless of the material of the cookware  5 , with the thermal image taken from obliquely above the cookware  5 . 
     When the thermal image taken from the side of the cookware  5  is used, for example, as the comparative example, no temperature information can be acquired from the thermal image if the cookware  5  has low thermal conductivity, such as a stainless steel pot. Therefore, the content level cannot be detected, and thus boil-over determination cannot be made. Furthermore, when multiple cookwares  5  are arranged in parallel when seen from the thermal image camera  2 , even if the cookwares  5  have high thermal conductivity, such as an enamel pot, temperature information on the respective cookwares  5  cannot be acquired from the thermal image, and thus the content levels cannot be detected. 
     Alternatively, when a thermal image taken from immediately above (above) the cookware  5  is used, for example, temperature information on the content can be detected even if the cookware  5  has low thermal conductivity, such as a stainless steel pot. However, in the early stage of shooting when the temperature of the content is low, it is difficult to distinguish the cooking heater  3  from the cookware  5  in the acquired thermal image. This reduces the accuracy of detecting the edge of the cookware  5 . Therefore, temperature information on the content in the cookware  5  cannot be accurately acquired. Furthermore, when the thermal image taken from immediately above (above) the cookware  5  is used, it is difficult to distinguish the upper edge of the content from the edge of the cookware  5 . Thus, the content level cannot be accurately detected from the thermal image. Therefore, when the thermal image taken from immediately above (above) the cookware  5  is used, accurate boil-over determination cannot be made. 
     On the other hand, the cooking support system and the cooking support method according to this embodiment make it easier to distinguish the upper edge of the content from the edge of the cookware  5 , regardless of the material of the cookware  5 , by use of the thermal image taken from obliquely above (oblique above angle) the cookware  5 . Therefore, it is made easier to more accurately detect the content level, and to calculate a change in level (shift in level) of the content. Thus, accurate boil-over determination can be made. As a result, the content in the cookware  5  can be prevented from boiling over the cookware  5  by detecting occurrence thereof beforehand, regardless of the material of the cookware  5 . 
     Embodiment 2 
     In Embodiment 1, the description is given of the cooking support method and the cooking support system when the cookware  5  such as a pot is not covered, for example. However, the present disclosure is not limited thereto. In Embodiment 2, description is given of a cooking support method and a cooking support system considering a case where a cookware  5  is covered. In the following description, description of the same points as Embodiment 1 is omitted, and differences are mainly described. 
     [Configuration of Cooking Support System  1 A] 
       FIG. 10  is a block diagram showing a configuration example of a cooking support system  1 A according to Embodiment 2. The same components as those shown in  FIG. 3  are denoted by the same reference numerals, and detailed description thereof is omitted. 
     As shown in  FIG. 10 , the cooking support system  1 A includes a boil-over detector  10 A, a notifier  20 , and a heating controller  30 . The cooking support system  1 A shown in  FIG. 10  is different from the cooking support system  1  according to Embodiment 1 in the configuration of the boil-over detector  10 A. The other configuration is the same as that of Embodiment 1, and thus description thereof is omitted here. 
     [Configuration of Boil-Over Detector  10 A] 
     As shown in  FIG. 10 , the boil-over detector  10 A includes a data acquirer  11 , a hot portion detector  12 , a cookware detector  13 , a storage  14 , a change calculator  15 A, a boil-over determiner  16 A, and a lid determiner  17 . The boil-over detector  10 A detects the possibility of the content boiling over the cookware  5  based on a thermal image acquired from the thermal image camera  2 . To be more specific, the boil-over detector  10 A shown in  FIG. 10  is obtained by adding the lid determiner  17  to the boil-over detector  10  in Embodiment 1, and is different from the boil-over detector  10  in configurations of the change calculator  15 A and the boil-over determiner  16 A. 
     The lid determiner  17  determines whether or not there is a lid on the cookware  5  during cooking, based on the thermal image. When determining that there is the lid on the cookware  5  during cooking, the lid determiner  17  further detects an outside edge of the lid of the cookware  5  based on the thermal image. 
     When the lid determiner  17  determines that there is the lid on the cookware  5  during cooking, the change calculator  15 A calculates a value of a temperature change in the outside edge detected by the lid determiner  17 , as a value indicating a change in content level in the cookware  5 . Here, the change calculator  15 A calculates a value indicating a change in area of a region having a predetermined temperature or higher at and around the outside edge in the thermal image of the cookware  5  acquired at the predetermined time intervals, as the value of a temperature change in the outside edge. 
     The boil-over determiner  16 A determines whether or not the value indicating a change in level calculated by the change calculator  15 A is not less than a predetermined threshold. To be more specific, when the lid determiner  17  determines that there is no lid on the cookware  5  during cooking, the boil-over determiner  16 A determines whether or not the value of a temperature change in the outside edge calculated by the change calculator  15 A is not less than a predetermined threshold (fourth threshold). When determining that the value of a temperature change in the outside edge calculated by the change calculator  15 A is not less than the predetermined threshold (fourth threshold), the boil-over determiner  16 A determines that there is the possibility of the content boiling over the cookware  5  during cooking. 
     [Operations of Cooking Support System  1 A] 
     Next, description is given of operations of the cooking support system  1 A configured as described above. 
       FIG. 11  is a flowchart showing an example of operations of the cooking support system  1 A according to Embodiment 2. The same components as those shown in  FIG. 4  are denoted by the same reference numerals, and detailed description thereof is omitted. 
     First, the cooking support system  1 A performs thermal image acquisition processing to acquire a thermal image of a region including the cookware  5  at predetermined time intervals from the thermal image camera  2  through the network  7  (S 1 ). 
     Next, the cooking support system  1 A performs cookware detection processing to detect the cookware  5  based on the thermal image acquired in S 1  (S 3 ). 
     Then, the cooking support system  1 A performs lid detection processing to detect a lid of the cookware  5  based on the thermal image acquired in S 1  (S 4 ). Here, with reference to  FIG. 12 , the lid detection processing is described in detail.  FIG. 12  is a flowchart showing an example of specific operations of S 4  in  FIG. 11 . 
     As shown in  FIG. 12 , the cooking support system  1 A first acquires positional information and temperature information on the cookware  5  stored in S 3  from the storage  14  (S 41 ). Then, after the elapse of a predetermined time (Yes in S 42 ), the cooking support system  1 A acquires latest temperature information on the cookware  5  (S 43 ). In this embodiment, the latest temperature information on the cookware  5  is a latest thermal image of a hot region detected by the hot portion detector  12  and stored in the storage  14 . Thereafter, the cooking support system  1 A calculates a change that is a difference between the previous temperature and the latest temperature (S 44 ). To be more specific, the cooking support system  1 A calculates a change that is a difference between the previous temperature information and the latest temperature information, from the thermal image (previous temperature information) of the hot region in the cookware  5  before the elapse of the predetermined time and the thermal image (latest temperature information) of the hot region in the cookware  5  after the elapse of the predetermined time, which are acquired in S 41  and S 43 . Next, the cooking support system  1 A determines whether or not the calculated change is not less than a threshold (third threshold) (S 45 ). When determining in S 45  that the change calculated in S 44  is not less than the third threshold (Yes in S 45 ), the cooking support system  1 A makes lid-absent determination, i.e., determines that there is no lid on the cookware  5  (S 46 ). On the other hand, when determining that the change calculated in S 44  is less than the third threshold (No in S 45 ), the cooking support system  1 A makes lid-present determination, i.e., determines that there is the lid on the cookware  5  (S 47 ). Lastly, the cooking support system  1 A stores the determination result in S 45 , i.e., lid information on the cookware  5  in the storage  14  (S 48 ). 
     Then, the cooking support system  1 A performs boil-over determination processing (S 5 A). Here, with reference to  FIG. 13 , the boil-over determination processing performed by the cooking support system  1 A is described in detail.  FIG. 13  is a flowchart showing an example of specific operations of S 5 A in  FIG. 11 . 
     As shown in  FIG. 13 , the cooking support system  1 A first acquires the lid information on the cookware  5  stored in S 4  from the storage  14  (S 501 ) and determines whether or not there is a lid on the cookware  5  (S 502 ). 
     When determining in S 502  that there is no lid on the cookware  5  (No in S 502 ), the cooking support system  1 A moves to S 51  shown in  FIG. 6  and performs the boil-over determination processing described in S 51  to S 59  shown in  FIG. 6 . 
     On the other hand, when determining in S 502  that there is the lid on the cookware  5  (Yes in S 502 ), the cooking support system  1 A stores edge temperature information on the cookware  5  in the storage  14  (S 503 ). In this embodiment, the cooking support system  1 A specifies the position of the edge (outside edge) of the cookware  5  in the thermal image, based on the positional information on the cookware  5  acquired from the storage  14 . Then, the cooking support system  1 A extracts temperature information (thermal image) at the position of the concerned edge of the cookware  5  from the temperature information (thermal image) acquired from the storage  14 , and stores the extracted temperature information as temperature information (thermal image) of the edge of the cookware  5  in the storage  14 . Note that the position of the concerned edge (outside edge) of the cookware  5  may be a position at and around the concerned edge, and may be a position at and outside or at and inside the concerned edge, or an outside position slightly away from the concerned edge. 
     Next, the cooking support system  1 A checks if the edge temperature information of a predetermined time ago is stored in the storage  14  (S 504 ). Note that, when it is confirmed in S 504  that the edge temperature information of the predetermined time ago is not stored in the storage  14  (No in S 504 ), the cooking support system  1 A moves to S 1  shown in  FIG. 11  to start over from the thermal image acquisition processing. 
     On the other hand, when it is confirmed in S 504  that the edge temperature information of the predetermined time ago is stored in the storage  14  (Yes in S 504 ), the cooking support system  1 A calculates a change from the previous temperature of the edge (S 505 ). To be more specific, the cooking support system  1 A calculates a change that is a difference between the previous temperature and the latest temperature, from the thermal image (previous temperature) of the edge before the elapse of the predetermined time and the thermal image (latest temperature) of the edge after the elapse of the predetermined time. 
     Thereafter, the cooking support system  1 A determines whether or not the calculated change is not less than a threshold (fourth threshold) (S 506 ). When determining that the change calculated in S 505  is less than the fourth threshold (No in S 506 ), the cooking support system  1 A moves to S 1  shown in  FIG. 11  to start over from the thermal image acquisition processing. 
     On the other hand, when determining in S 506  that the change calculated in S 505  is not less than the fourth threshold (Yes in S 506 ), the cooking support system  1 A determines boil-over occurrence (S 507 ). This boil-over occurrence means, as described above, that the content is to boil over the cookware  5  during cooking within a few seconds, for example. Note that the cooking support system  1 A may determine that the change calculated in S 505  is not less than the fourth threshold, when a temperature region having 75° C. or higher appears in the thermal image at and around the position of the concerned edge (outside edge). The cooking support system  1 A may also determine that the change calculated in S 505  is not less than the fourth threshold, when the temperature region having 75° C. or higher loses its shape (is no longer circular) in the thermal image at and around the position of the concerned edge (outside edge), depending on the material of the cookware  5 . 
     Here, with reference to  FIGS. 14 and 15 , description is given of the reason why the determination can be made as described above. 
       FIGS. 14 and 15  are thermal images showing an example of how boiling over occurs when the cookware has a lid on in Embodiment 2. In  FIGS. 14 and 15 , as described above, the cookwares  51  and  52  are each an example of the cookware  5 , and represent a stainless steel pot and an enamel pot, respectively. Also, the cookware  51  has a lid  51   a  on, and the cookware  52  has a lid  52   a  on. 
     For example, as shown in (a) of  FIG. 14 , no hot region having 70° C. or higher appears in the thermal image when the cookware  51  has the lid  51   a  on before boiling. On the other hand, as shown in (b) of  FIG. 14 , when there is the possibility of boiling over, a hot region having 70° C. or higher (hatched portion in (b) of  FIG. 14 ) appears in a part of the vicinity of the edge (outside edge) of the lid  51   a.  Note that the hot region corresponds to boil-off bubbles from a gap between the cookware  51  and the lid  51   a.  Thereafter, as shown in (c) and (d) of  FIG. 14 , the hot region having 70° C. or higher (hatched portion in (c) and (d)  FIGS. 14 ) in a part of the edge is gradually increased in size, and the extent of the boil-off bubbles is increased, resulting in actual boiling over. Since boiling over occurs and progresses as described above, the boil-over occurrence can be determined when a temperature region having 75° C. or higher appears at and around the edge of the lid  51   a.    
     Note that the same goes for the cookware  52  with the lid  52   a  on, which is an enamel pot, shown in  FIG. 15 . However, in the case of the enamel pot, temperature changes in the cookware  5  can be seen from the thermal images. To be more specific, as shown in (a) of  FIG. 15 , for example, no hot region having 70° C. or higher appears in the thermal image when the cookware  51  has the lid  51   a  on before boiling. On the other hand, as shown in (b)  FIG. 15 , when vapor is generated, a part of the lid  52   a  is heated by the vapor inside the cookware  52 , and thus a hot region having 70° C. or higher (hatched portion in (b) of  FIG. 15 ) appears in a part of the lid  52   a.  Then, as shown in (c) of  FIG. 15 , when there is the possibility of boiling over, a hot region having 70° C. or higher (hatched portion in (c) of  FIG. 15 ) appears across the lid  52   a.  This is because the content level in the cookware  52  rises close to the lid  52   a  and the content is just about to boil over. Thereafter, as shown in (d) of  FIG. 15 , the hot region having 70° C. or higher (hatched portion in (d) of  FIG. 15 ) across the lid  52   a  loses its shape, and boiling over actually occurs. Such loss of shape on the thermal image occurs because the extent of the boil-off bubbles through a gap between the cookware  52  and the lid  52   a  is increased to push up the lid  52   a  and some of the content boils over the cookware  52 . Since boiling over occurs as described above, the boil-over occurrence can be determined not only when a temperature region having 75° C. or higher appears at and around the position of the edge of the lid  52   a  but also when the region having a predetermined temperature or higher at and around the position of the concerned edge loses its shape (is no longer circular). 
     [Advantageous Effects and the Like of Embodiment 2] 
     As described above, for the cookware  5  having low thermal conductivity, such as a stainless steel pot, boil-over determination cannot be made by detecting the content level directly from the thermal image if the cookware has the lid on. However, with the cooking support system and the cooking support method according to this embodiment, the boil-over determination can be made by detecting the hot portion in the thermal image indicating boil-off bubbles appearing on the edge (edge portion) of the lid or the loss of shape of the hot portion in the thermal image appearing across the lid. Thus, the content in the cookware  5  can be prevented from boiling over the cookware  5  by detecting occurrence thereof beforehand, regardless of the material of the cookware  5 . 
     Embodiment 3 
     In Embodiments 1 and 2, the description is given of the cooking support method and the cooking support system when no human is involved until boiling over from the cookware  5  occurs. However, the present disclosure is not limited thereto. In Embodiment 3, description is given of a cooking support method and a cooking support system considering a case where a user (human) engages with the cookware  5  by stirring the content or opening the lid. In the following description, description of the same points as Embodiments 1 and 2 is omitted, and differences are mainly described. 
     [Configuration of Cooking Support System  1 B] 
       FIG. 16  is a block diagram showing a configuration example of a cooking support system  1 B according to Embodiment 3. The same components as those shown in  FIGS. 3 and 10  are denoted by the same reference numerals, and detailed description thereof is omitted. 
     As shown in  FIG. 16 , the cooking support system  1 B includes a boil-over detector  10 B, a notifier  20 , and a heating controller  30 . The cooking support system  1 B shown in  FIG. 16  is different from the cooking support system  1 A according to Embodiment 2 in the configuration of the boil-over detector  10 B. The other configuration is the same as that of Embodiment 2, and thus description thereof is omitted here. 
     [Configuration of Boil-Over Detector  10 B] 
     As shown in  FIG. 16 , the boil-over detector  10 B includes a data acquirer  11 , a hot portion detector  12 , a cookware detector  13 , a storage  14 , a change calculator  15 A, a boil-over determiner  16 B, a lid determiner  17 , and a human presence detector  18 . The boil-over detector  10 B detects the possibility of the content boiling over the cookware  5  based on a thermal image acquired from the thermal image camera  2 . To be more specific, the boil-over detector  10 B shown in  FIG. 16  is obtained by adding the human presence detector  18  to the boil-over detector  10 A in Embodiment 2, and is different from the boil-over detector  10 A in the configuration of the boil-over determiner  16 B. 
     The human presence detector  18  checks if there is a human temperature region that is a temperature region indicating a human in a background region other than a cookware region that is a predetermined region including the cookware  5 , within the concerned region of the thermal image acquired by the data acquirer  11 . Thus, the human presence detector  18  detects the presence of the human in the background region of the thermal image acquired by the data acquirer  11 . 
     The boil-over determiner  16 B determines whether or not the value indicating a change in level calculated by the change calculator  15 A is not less than a predetermined threshold. To be more specific, when the human presence detector  18  confirms that there is the human temperature region in the background region, the boil-over determiner  16 B resets the value indicating a temperature change in the content level in the cookware  5 . Note that, when the human presence detector  18  cannot confirm that there is the human temperature region in the background region, i.e., when the human presence detector  18  confirms that there is no human in the background region, the boil-over determiner  16 B operates in the same manner as the boil-over determiner  16 A described in Embodiment 2, and thus description thereof is omitted here. 
     [Operations of Cooking Support System  1 B] 
     Next, description is given of operations of the cooking support system  1 B configured as described above. 
       FIG. 17  is a flowchart showing an example of operations of the cooking support system  1 B according to Embodiment 3. The same components as those shown in  FIGS. 4 and 11  are denoted by the same reference numerals, and detailed description thereof is omitted. 
     First, the cooking support system  1 B performs thermal image acquisition processing (S 1 B). To be more specific, the cooking support system  1 B acquires a thermal image of a region including the cookware  5  at predetermined time intervals from the thermal image camera  2  through the network  7  (S 11 ) and then performs region-by-region thermal image generation processing (S 12 ). Here, with reference to  FIGS. 18 and 19 , the region-by-region thermal image generation processing is described in detail.  FIG. 18  is a flowchart showing an example of specific operations of S 12  in  FIG. 17 .  FIG. 19  is a diagram for explaining a region-by-region thermal image generated in S 12  in  FIG. 17 . As shown in  FIG. 18 , the cooking support system  1 B first separates the thermal image of the region including the cookware  5  acquired at the predetermined time intervals in S 11  into the cookware region that is the predetermined region including the cookware  5  and the background region other than the cookware region (S 121 ). In the example shown in  FIG. 19 , the cooking support system  1 B separates a thermal image  200  of the region including the cookware  5  (not shown) acquired in S 11  into a cookware region  201  and a background region  202 . Next, the cooking support system  1 B calculates average temperatures within the cookware region and within the background region (S 122 ). Then, the cooking support system  1 B creates a thermal image of the cookware region and a thermal image of the background region (S 123 ). Note that the processing order of S 122  and S 123  may be reversed. 
     Thereafter, the cooking support system  1 B performs human detection processing by using the thermal image of the background region created in S 1 B (S 2 B). Here, with reference to  FIG. 20 , the human detection processing is described in detail.  FIG. 20  is a flowchart showing an example of specific operations of S 2 B in  FIG. 17 . As shown in  FIG. 20 , the cooking support system  1 B first acquires the thermal image of the background region at predetermined time intervals created in S 12  (S 201 ). Next, the cooking support system  1 B checks if there is a temperature region indicating a human, which is a temperature region close to a human body temperature, in the acquired thermal image of the background region (S 202 ). 
     When there is no temperature region indicating a human in the acquired thermal image of the background region in S 202  (No in S 202 ), the cooking support system  1 B moves to processing in S 3 . On the other hand, when it is confirmed that there is the temperature region indicating a human in the acquired thermal image of the background region in S 202  (Yes in S 202 ), the cooking support system  1 B further checks if determination of boil-over anticipation has been made (S 203 ). 
     When it is confirmed in S 203  that no determination of boil-over anticipation has been made (No in S 203 ), the cooking support system  1 B returns to S 1 B to perform the thermal image acquisition processing. On the other hand, when it is confirmed in S 203  that the determination of boil-over anticipation has been made (Yes in S 203 ), the cooking support system  1 B resets the information to be used for boil-over determination (S 204 ) and then returns to S 1 B to perform the thermal image acquisition processing again. In this embodiment, in S 204 , the cooking support system  1 B resets the value indicating the temperature change in the content level in the cookware  5  stored in the storage  14 . When a thermal image of a hot portion acquired a predetermined time ago in the cookware  5  is stored in the storage  14 , for example, as information indicating the content level in the cookware  5  detected a predetermined time ago, the thermal image of the hot portion acquired the predetermined time ago may be deleted. Also, when an increase in the content level in the cookware  5  is stored, for example, in the storage  14  as the value indicating the temperature change in the content level in the cookware  5 , the increase may be set to 0. Moreover, when the edge temperature information (thermal image) acquired a predetermined time ago is stored, in the storage  14  as the value indicating the temperature change in the content level in the cookware  5 , the edge temperature information acquired the predetermined time ago may be deleted. 
     Hereinafter, further description is given referring back to  FIG. 17 . 
     Next, the cooking support system  1 B performs cookware detection processing to detect the cookware  5  based on the thermal image of the background region created in S 1 B (S 3 B). Here, with reference to  FIG. 21 , the cookware detection processing in S 3 B is described in detail.  FIG. 21  is a flowchart showing an example of specific operations of S 3 B in  FIG. 17 . As shown in  FIG. 21 , the cooking support system  1 B first acquires the thermal image of the cookware region created in S 1 B (S 301 ). Next, the cooking support system  1 B performs binarization processing (S 301 ) and then smoothing processing (S 302 ) on the thermal image of the cookware region acquired in S 301 . Note that the processing of S 301  and S 302  is the same as S 31  and S 32  in  FIG. 5  described in Embodiment 1. Moreover, the processing of S 303  to S 306  is the same as S 33  to S 36  in  FIG. 5  described in Embodiment 1, and thus description thereof is omitted here. 
     Then, the cooking support system  1 B performs lid detection processing on the cookware  5  based on the thermal image of the cookware region created in S 1 B (S 4 ). Since the processing of S 4  to S 9  is as described in Embodiment 2, description thereof is omitted. 
     [Advantageous Effects and the Like of Embodiment 2] 
     As described above, the cooking support system and the cooking support method according to this embodiment can prevent the content from boiling over the cookware  5  by detecting occurrence thereof beforehand, regardless of the material of the cookware  5 , considering the case where the user (human) engages with the cookware  5  by stirring the content or opening the lid. 
     Note that, in the above embodiment, the description is given of the case where the predetermined region including the cookware  5  in the thermal image taken by the thermal image camera  2  is set as the cookware region and the region other than the cookware region is set as the background region. However, the present disclosure is not limited thereto. As for the background region, a region indicating the cooking heater  3  in the thermal image may be set as the cookware region and a region other than the region indicating the cooking heater  3  may be set as the background region. 
     The cooking support method and the cooking support system according to one or more aspects of the present disclosure have been described above based on the embodiments. However, the present disclosure is not limited to those embodiments. Embodiments obtained by applying various modifications conceived by those skilled in the art to the above embodiments and embodiments configured by combining constituent elements in different embodiments may be included within the scope of one or more aspects of the present disclosure without departing from the spirit of the present disclosure. For example, the following cases are also included in the present disclosure. 
     (1) In Embodiments 1 to 3 described above, the description is given of the case where the cooking support system and the cooking support method determines the possibility of boiling over by acquiring the thermal image of the region including the cookware  5  at the predetermined time intervals from the thermal image camera  2 . However, the present disclosure is not limited thereto. 
     For example, when the content in the cookware  5  starts boiling, the possibility of boiling over may be determined by acquiring thermal images of the region including the cookware  5  at time intervals shorter than the predetermined time described above. Thus, the accuracy of determining the boil-over occurrence can be further improved. 
     (2) It is also conceivable that a pattern of a temperature change in content or of a change in content level may vary depending on the kind or material of the cookware  5 . Therefore, the possibility of boiling over may be determined by using learning data obtained by previously learning the correspondence between change patterns of the temperature and level of the content in the cookware  5  and the heating state of the cookware  5 . Particularly, when the cookware  5  has the lid on, the size and movement of bubbles adhering to the edge of the lid are not uniform immediately before the occurrence of boiling over. Therefore, improvement in the accuracy of determining the boil-over occurrence can be expected by previously learning the correspondence between change patterns of the temperature and level of the content in the cookware  5  and the heating state of the cookware  5 . 
     Note that the learning data may be stored in a specific local device disposed in the cooking support system. Alternatively, the learning data may be acquired from a cloud server or the like disposed in a location different from the local device. 
     Moreover, it is also conceivable that, in the case of using the learning data, the possibility of boiling over can be determined by using not only the thermal image but also a normal image. This is because the correspondence between change patterns of the temperature and level of the content in the cookware  5  and the heating state of the cookware  5  in the normal image can be previously learned. 
     (3) Each of the devices described above is a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, a display unit, a keyboard, a mouse, and the like. The RAM or the hard disk unit stores computer programs. The microprocessor operates according to the computer program, thereby allowing each of the devices to accomplish its functions. The computer program herein includes a combination of multiple command codes indicating instructions to a computer in order to accomplish predetermined functions. 
     (4) Some of or all of the constituent components included in the devices described above may be achieved by a single system LSI (Large Scale Integration) circuit. The system LSI circuit is a super-multifunctional LSI circuit fabricated by integrating a plurality of components on a single chip and, more specifically, a computer system including a microprocessor, a ROM, a RAM, and the like. The RAM stores a computer program. When the microprocessor operates in accordance with the computer program, the system LSI circuit achieves functions thereof. 
     (5) Some of or all of the constituent components included in the devices described above may be achieved by an IC card removably attached to each device or a separate module. The IC card or the module is a computer system including a microprocessor, a ROM, a RAM, and the like. The IC card or the module may include the super-multifunctional LSI circuit described above. When the microprocessor operates in accordance with the computer program, the IC card or the module achieves functions thereof. The IC card or the module may be tamper-resistant. 
     (6) The present disclosure may be the methods described above. Alternatively, the present disclosure may be a computer program with which a computer achieves these methods, or a digital signal including the computer program. 
     Alternatively, the present disclosure may be a computer-readable recording medium, namely, for example, a flexible disk, a hard disk, a CD-ROM, an MO, a DVD, a DVD-ROM, a DVD-RAM, a BD (Blu-ray (registered trademark) Disc), or a semiconductor memory, storing the computer program or the digital signal. Alternatively, the present disclosure may be the digital signal recorded on one of these recording media. 
     Alternatively, the present disclosure may be the computer program or the digital signal transmitted through an electrical communication line, a wireless or wired communication line, a network typified by the Internet, datacasting, or the like. 
     Alternatively, the present disclosure may be a computer system including a microprocessor and a memory. The memory may store the computer program, and the microprocessor may operate in accordance with the computer program. 
     Alternatively, the present disclosure may be implemented by an independent computer system using the computer program or the digital signal transported in one of the recording media or through the network or the like. 
     (7) The above embodiments may be combined with one another. 
     The present disclosure is applicable to a cooking support method and a cooking support system for detecting and preventing boiling over during cooking with a cookware such as a pot, and is particularly applicable to a cooking support method and a cooking support system used for a cooking heater such as an IH cooking heater and a stove capable of externally controlling gas and fire.