JP5482169B2 - Digital camera, message display method, and program - Google Patents

Description

  The present invention relates to a digital camera that records a photographed image in association with information for specifying a photographing position.

  Conventionally, as a positioning technique using GPS (Global Positioning System), at the time when a GPS signal is received from a GPS satellite, at least the GPS signal from the positioning satellite necessary for calculating the position of the imaging position (GPS raw data) ) Or specific positioning information such as pseudo-range data that can be obtained if the satellite can be captured, and then using the GPS raw data and specific positioning information at an arbitrary time point, the GPS signal reception position (latitude, longitude) ) Is finally known.

  Further, in relation to such a technique, for example, in Patent Document 1 below, in a digital camera having a positioning function using GPS, position data (position data indicating the position of a shooting position) is used as position specifying information for specifying a shooting position at the time of shooting. (Latitude, Longitude) or specific positioning information such as pseudo distance data is acquired, the acquired position specifying information is added to the captured image and recorded, and the type of position specifying information acquired at the time of shooting A configuration for switching manually or automatically is described.

  In addition, in the digital camera described in Patent Document 1 below, GPS information is insufficient if four or more satellites necessary for accurate position calculation cannot be acquired when acquiring position specifying information at the time of shooting. Is displayed to the user (photographer) to notify the photographer of the success or failure of acquisition (recording) of the position specifying information at the time of photographing.

JP 2008-271325 A

  However, in the above-described conventional digital camera, when the position specifying information acquired at the time of shooting is automatically changed, the photographer can know the success or failure of acquisition (recording) of the position specifying information at the time of shooting. However, there is a problem that it is inconvenient because it is impossible to know what information can be acquired (recorded) as the position specifying information when the position specifying information can be acquired.

  The present invention has been made in view of such conventional problems, and it is an object of the present invention to improve the convenience of a photographer at the time of photographing in a configuration in which information identifying a photographing position is recorded in association with a photographed image. .

In order to solve the above-described problem, in the digital camera according to the first aspect of the present invention, the digital camera is sent from a plurality of satellites and an imaging unit for recording a captured image to be recorded in accordance with a shooting instruction on a recording medium. Positioning means for receiving a radio wave, obtaining specific positioning information necessary for calculation of position information indicating the reception position of the radio wave, and executing a positioning process for calculating the position information using the specific positioning information ; Information acquisition means for acquiring the position information or the specific positioning information as different types of position specifying information according to the progress of the positioning process by the positioning means at the time of shooting by the shooting means; and the information acquisition and position information recording means for recording the position specifying information acquired in association with the images picked up by the imaging means by means advances the positioning processing by the information acquisition means And confirmation means for confirming the type of the acquired position identification information depending on the situation, the during photographing by photographing means, a plurality of messages prepared in advance to correspond to the type of location specific information is confirmed by the confirmation means Display control means for selectively displaying any one of the above.

In the digital camera according to the second aspect of the present invention, the positioning means receives radio waves transmitted from a plurality of satellites, and stores specific positioning information already recorded in association with captured images. And calculating position information indicating a reception position of the radio wave received when the captured image is captured, and the information acquisition means records the positioning information in association with the captured image by the position information recording means. According to the progress of the positioning process by the positioning means, position information indicating the reception position of the radio wave received when the captured image is captured is acquired, and the position information recording means is already associated with specific positioning information. The recorded image is recorded in association with the position information acquired by the information acquisition unit .
In the digital camera according to the third aspect of the invention, the positioning means can improve the accuracy of the position specifying information as the number of satellites that have received radio waves at the same radio wave reception position increases. The message corresponding to the type of position specifying information with low accuracy includes a message for suppressing movement from the current position to the user.
Further, in the digital camera according to the invention of claim 4, the positioning means acquires the pseudo distance with each satellite based on the radio wave transmitted from each satellite as the specific positioning information, Based on the navigation data sent from each satellite and the pseudo distance, position information indicating the reception position of the radio wave from the satellite is calculated, and the message when the type of position specifying information is pseudo distance is Includes a message for suppressing power-off.
In the digital camera according to the fifth aspect of the invention, the message corresponding to the type of the position specifying information includes the accuracy of the position specifying information.

In the digital camera according to the sixth aspect of the present invention, the message corresponding to the type of the position specifying information includes advice regarding the correspondence after shooting according to the type of the position specifying information. Features.

In the digital camera according to claim 7 , when the position information can be acquired as the position specifying information by the positioning means, the photographing performed by the positioning means within a predetermined period. Calculation control means for calculating the position information indicating a past photographing position at the time of photographing of the photographed image associated with the positioning information based on the positioning information recorded in the recording medium in association with the image; and Position determining means is provided for recording the position information calculated by the calculation control means on the recording medium in place of the original positioning information used for calculating the position information.

Further, in the digital camera according to the invention described in claim 8 , when the position specifying information is not acquired by the positioning means at the time of shooting, it is recorded on a recording medium in association with a specific shot image shot in the past. And recording control means for recording the position specifying information on a recording medium in association with a newly captured image.

Further, in the digital camera according to the ninth aspect of the present invention, when the position information with high accuracy is acquired as the position specifying information by the positioning means at the time of shooting, it is associated with a specific shot image shot in the past. The position specifying information other than the high-precision position information recorded on the recording medium is provided with correction means for correcting the high-precision position information acquired at the time of shooting.

In the message display method according to the tenth aspect of the present invention, there is provided a photographing process for recording a photographed image photographed in accordance with a photographing instruction on a recording medium, and radio waves transmitted from a plurality of satellites. , After obtaining specific positioning information necessary for calculating the position information indicating the reception position of the radio wave, the positioning processing for calculating the position information using the specific positioning information, and the shooting at the time of shooting by the shooting processing According to the progress of the positioning process, the information acquisition process for acquiring the position information or the specific positioning information as different types of position specifying information, and the position specifying information acquired by the information acquisition process by the imaging process Ensure the position information recording process of recording in association with the images picked up, the contents of the position specifying information acquired in accordance with the progress of the positioning processing by the information acquisition process And confirmation process, at the time of imaging by the imaging process, and a display control process of selectively displaying any one of a plurality of messages prepared in advance to correspond to the type of location specific information was confirmed by the confirmation process It is characterized by including.

In the program according to the eleventh aspect, the computer of the digital camera is sent from a plurality of satellites and photographing means for recording a photographed image photographed in accordance with a photographing instruction on a recording medium. Positioning means that receives the incoming radio wave, acquires specific positioning information necessary for calculating the position information indicating the reception position of the radio wave, and then executes a positioning process for calculating the position information using the specific positioning information Information acquisition means for acquiring the position information or the specific positioning information as different types of position specifying information according to the progress of the positioning process by the positioning means at the time of shooting by the shooting means, and the information and position information recording means for recording the position specifying information acquired by the acquiring means in association with the images picked up by the imaging means, the information acquisition means And confirmation means for confirming the type of the position specifying information acquisition in accordance with the progress status of the positioning process, the at the time of photographing by the photographing means, prepared in advance to correspond to the type of location specific information is confirmed by the confirmation means It is characterized by functioning as a display control means for selectively displaying any one of the plurality of messages.

  According to the present invention, it is possible to improve the convenience of the photographer at the time of photographing in the configuration in which the information specifying the photographing position is recorded in association with the photographed image.

1 is a block diagram of a digital camera according to the present invention. It is a timing chart which shows operation | movement of a GPS part. It is a flowchart which shows the process sequence in the control part in recording mode. It is a flowchart following FIG. It is a flowchart which shows the position determination process in a control part.

  Hereinafter, embodiments of the present invention will be described. The present embodiment relates to a digital camera that has a positioning function based on GPS, and adds position specifying information for specifying a shooting position at which shooting is performed to a shot image and records it at the time of shooting.

  FIG. 1 is a block diagram showing an outline of the electrical configuration of a digital camera 1 according to the present invention. As shown in FIG. 1, the digital camera 1 mainly includes a camera unit 2, a GPS unit 3, and a power supply unit 4.

  The power supply unit 4 includes a rechargeable battery, a DC / DC converter, and the like, and supplies power necessary for the operation of each unit to the camera unit 2 and the GPS unit 3.

  The camera unit 2 includes an imaging unit 21, an image processing unit 22, a control unit 23, an image memory 24, a display unit 25, and a key input unit 26.

  The imaging unit 21 performs predetermined analog processing on a CCD (Charge Coupled Device) or MOS (Complementary Meta10xide Semiconductor) type imaging device and an imaging signal output from the imaging device, and then converts the analog signal into a digital signal. It consists of AFE (Analog Front End). The imaging unit 21 sequentially captures the subject while the recording mode is set in the digital camera 1, and supplies the subject image data to the image processing unit 22.

  The image processing unit 22 is configured by, for example, a DSP (Digital Signal Processor), converts the image data supplied from the imaging unit 21 into RGB data, and further includes RGB data including a luminance (Y) component and a color difference (UV) component. Convert to YUV data. The converted YUV data is supplied to the display unit 25 via the control unit 23 while in the recording standby state in the recording mode.

  Further, the image processing unit 22 compresses the image data converted into YUV data by a JPEG (Joint Photographic Expert Group) method at the time of shooting when the shutter key 28 is pressed in the recording mode. The compressed image data is added with various attribute information such as the camera model name, shooting date, shooting position (latitude, longitude), shooting conditions, etc. by the control unit 23, and conforms to the Exif (Exchangeable Image File Format) standard. The stored still image file is stored in the image memory 24.

  Further, when the playback mode is set in the digital camera 1, the image processing unit 22 is recorded as a still image file in the image memory 24 based on an instruction from the control unit 23, and is compressed by the user. Decompress the image data in the state. The decompressed image data (YUV data) is supplied to the display unit 25 via the control unit 23.

  The control unit 23 is a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory) in which various control programs are stored, a working RAM (random-access memory), and an input / output interface. The operation of the digital camera 1 is controlled based on the control program. The various control programs stored in the ROM cause the control unit 23 to function as information acquisition means, confirmation means, display control means, calculation control means, position determination means, recording control means, and correction means of the present invention. A program is included.

  The control unit 23 includes a built-in clock 23a having a calendar function for acquiring the date and time at the time of shooting.

  The image memory 24 includes, for example, a flash memory built in the digital camera 1, various memory cards that are detachable from the digital camera 1, and a card interface that enables data input / output to / from the memory card.

  The display unit 25 includes a color liquid crystal display panel and a display driving circuit that drives the color liquid crystal display panel in accordance with image data supplied from the control unit 23. In the shooting standby state, the display unit 25 performs live view display of subject images sequentially captured by the imaging unit 21, and immediately after shooting, displays a shot image recorded in the image memory 24 along with shooting, and displays a playback mode. Then, the captured image (recorded image) read out from the image memory 24 and expanded is displayed. The display unit 25 also displays various information for the user such as character information based on various OSD (On Screen Display) data supplied from the control unit 23 as necessary during the display of the image based on the image data. Display and function as the display means of the present invention.

  The key input unit 26 includes a plurality of operation keys such as a power key 27 and a shutter key 28, and a recording / reproducing mode switching key. The operation state of the operation key in the key input unit 26 is monitored at any time by the control unit 23.

  On the other hand, the GPS unit 3 is a part that functions as a positioning means of the present invention, and includes a receiving unit 31, a calculating unit 32, and a GPS memory 33.

  Although not shown, the receiving unit 31 mainly includes a signal processing unit, a demodulation unit, and a clock circuit. The signal processing unit receives a radio wave transmitted from a GPS satellite via the antenna 5, amplifies the received radio wave signal, that is, a GPS signal, converts the frequency to an intermediate frequency signal, and converts the signal to a digital signal. The demodulating unit performs a despreading process using a PRN (pseudo random number) code specific to the GPS satellite from the digital intermediate frequency signal converted by the signal processing unit to obtain navigation message data (hereinafter referred to as navigation data). .) Is demodulated, and the demodulated navigation data is supplied to the calculator 32. The clock circuit counts the current time with high accuracy.

  The receiving unit 31 includes four channels of demodulating units that demodulate the navigation data, and the navigation data can be received in parallel from the four GPS satellites.

  The calculation unit 32 is configured so that each demodulation unit of the reception unit 31 establishes synchronization with the navigation data superimposed on the GPS signal (when the satellite is captured), that is, the reception time of the GPS signal, respectively. Based on the satellite's own clock correction information and ephemeris (orbit information) included in the navigation data demodulated by the demodulator, calculate the pseudo-range to the GPS satellite, and the latitude and longitude of the GPS signal reception position. The result is sequentially supplied to the control unit 23 of the camera unit 2 as position data indicating the shooting position.

  The GPS memory 33 is a memory in which stored data can be rewritten. The GPS memory 33 stores the latest almanac (rough orbit information of each satellite) acquired from a GPS satellite at an arbitrary time. The GPS memory 33 is also used as a working memory for the calculation unit 32.

  Next, an operation according to the present invention of the digital camera 1 having the above configuration will be described. First, the position measurement (positioning) operation in the GPS unit 3 will be described. FIG. 2 is a timing chart showing the basic positioning operation contents in the GPS unit 3 after the power of the digital camera 1 is turned on.

  In the GPS unit 3, immediately after the power of the digital camera 1 is turned on, the receiving unit 31 starts an operation of establishing synchronization with the transmission timing of the navigation data superimposed on the GPS signal. That is, satellite acquisition starts. The period during which satellites are acquired is the “acquisition period” shown in the figure.

  When the satellite can be eventually acquired, the receiving unit 31 starts demodulating the navigation data, and thereafter, the calculation unit 32 sequentially stores the navigation data composed of a plurality of subframes Sub1 to Sub5 in the GPS memory 33. The period in which the navigation data is accumulated is the “tracking period” shown in the figure. Then, the calculation unit 32 calculates the position of the GPS satellite that is the source of the GPS signal at the time when the data of the three subframes Sub1 to Sub3, that is, the clock correction information of the satellite itself and the ephemeris can be acquired during the tracking period. To do.

  In addition, during the above operation, the GPS unit 3 is configured such that when the satellite acquisition is completed and tracking is started, the calculation unit 32 transmits the navigation data transmission timing on the GPS satellite side and the navigation data reception timing on the own aircraft side. On the basis of the deviation, the pseudo distance between the GPS satellite that is the source of the GPS signal and the own device is calculated. Then, the calculation unit 32 obtains the pseudorange data for the three satellites at the time point (T1) when the pseudoranges for the three satellites (satellites A, B, and C in the illustrated example) can be calculated. Thereafter, the pseudo-range data is continuously output at regular time intervals (“low-precision output period”).

  Thereafter, the calculation unit 32 calculates the pseudorange data for the four satellites at the time (T2) when the pseudoranges for the four satellites (satellites A, B, C, and D in the illustrated example) can be calculated. The data is output to the control unit 23, and thereafter, the pseudo distance data is continuously output at a constant time interval (“high accuracy output period”).

  The calculation unit 32 outputs the GPS signal reception time (the time when synchronization with the navigation data is established) together with the pseudorange data of each satellite, at the time of outputting the pseudorange data of each satellite, The satellite number indicating each satellite is output to the control unit 23 of the camera unit 2 as positioning information. Such positioning information corresponds to specific positioning information in the present invention.

  Furthermore, the calculation unit 32 performs rough position calculation based on the position of the three satellites (position calculation on the assumption that the reception position is on the earth surface) at the time when navigation data of the three satellites can be acquired (T3). After that, instead of the pseudo-range data for four satellites, approximate position data as a calculation result is sequentially output to the control unit 23 of the camera unit 2 at regular time intervals (“low-precision output period”). ).

  Thereafter, the calculation unit 32 performs accurate position calculation based on the position of the four satellites when the navigation data of the four satellites can be acquired (T4), and thereafter, the high-accuracy position data as the calculation result is obtained from the camera. It outputs sequentially to the control part 23 of the part 2 at a fixed time interval (“high-precision output period”).

  Note that when the position data is output, the calculation unit 32 also outputs information indicating the number of satellites used for position calculation (navigation data has been acquired) together with the position data. In addition, after performing accurate position calculation based on the positions of the four satellites, the calculation unit 32 is based on the positions of a plurality of satellites including newly acquired satellites every time navigation data of other GPS satellites can be acquired. Accurate position calculation is performed, and highly accurate position data as a calculation result is sequentially output to the control unit 23 of the camera unit 2 at regular time intervals.

  In addition, although not shown, in the GPS unit 3, when the positioning information described above is sent from the control unit 23 of the camera unit 2 at an arbitrary time during the above-described operation, the calculation unit 32 sends the received positioning information. Based on the information, using the navigation data such as ephemeris stored in the GPS memory 33, the latitude and longitude of the past reception position (shooting position) of the GPS signal are calculated. Then, the calculation unit 32 outputs the calculation result to the control unit 23 of the camera unit 2 as past position data indicating the past photographing position.

  Next, processing contents of the control unit 23 according to the present invention while the recording mode is set in the digital camera 1 will be described. 3 to 5 are flowcharts showing a processing procedure of the control unit 23 in the recording mode.

  When the recording mode is set, as shown in FIG. 3, the control unit 23 immediately performs position determination processing (step S1), and then detects the presence / absence of a shooting instruction by pressing the shutter key (step S2). Here, the position determination process in step S1 is an interrupt process by a timer, and is actually a process sequentially performed during a series of processes after step S3 described later. The contents of the position determination process will be described later.

  The control unit 23 repeats the position determination process until a shooting instruction can be detected (step S2: NO), and if a shooting instruction can be detected (step S2: YES), the shooting process is immediately performed (step S3). In step S <b> 3, the control unit 23 causes the image capturing unit 21 to capture an image of the captured image, and causes the image processing unit 22 to compress data of the captured subject image (captured image).

  Subsequently, the control unit 23 checks whether or not the position data is acquired, that is, whether or not the position data is sent from the GPS unit 3 (step S4), and when the position data is acquired (step S4). (S4: YES), the acquired position data is stored together with the captured image (step S5). That is, the control unit 23 causes the image memory 24 to store a still image file in which attribute information including the latitude and longitude of the shooting position is added to the compressed image data of the shot image. When the acquired position data is low-accuracy position data based on the positions of the three satellites, information indicating that is added to the captured image together with the position data.

  Thereafter, the control unit 23 displays the photographed image stored in step S5 as a review on the display unit 25 for a predetermined time (several seconds) (step S6).

Further, when the position data added to the photographed image is highly accurate position data based on the positions of four or more satellites (step S7: YES), the control unit 23 is referred to as a photographed image (hereinafter referred to as a review image). ), A first message prepared in advance corresponding to the case where high-accuracy position information has been acquired (recorded) is displayed (step S8). The first message is, for example,
“Location information was successfully acquired.”
Message. That is, it is a message reporting that high-accuracy position information has been added to the captured image.

  Then, after the display time of the review image has elapsed, the control unit 23 continuously performs a series of processes from step S9 to step S12 illustrated in FIG. For convenience, the series of processes will be described later.

On the other hand, when the position data added to the captured image is low-accuracy position data based on the positions of the three satellites (step S7: NO), the control unit 23 obtains low-accuracy position information superimposed on the review image ( A second message prepared in advance corresponding to the case of recording is displayed (step S13). The second message is, for example,
“We have acquired low-accuracy location information. To obtain high-accuracy location information for the next shot, do not move the location for a while.”
It is a message with the content. In other words, the message includes a report indicating that low-accuracy position information has been added to the photographed image and advice regarding the correspondence after photographing.

  And the control part 23 waits for progress of the display time of a review image, and returns to the process of step S1.

  Further, unlike the above-described processing, when position data cannot be acquired at the time of shooting (step S4: NO), the control unit 23 further confirms whether or not pseudo distance data is acquired (step S14). When the pseudo distance data is acquired, the control unit 23 (step S14: YES), the acquired pseudo distance data, and the satellite for which the pseudo distance calculated with the pseudo distance data (captured satellite) is sent. Positioning information consisting of a satellite number indicating, and a GPS signal reception time from each satellite is stored together with the captured image (step S15). That is, the control unit 23 stores, in the image memory 24, a still image file in which the positioning information for four satellites or three satellites is added to the compressed image data of the photographed image, in addition to the attribute information including the photographing date and time and the photographing conditions. Let

  Thereafter, the control unit 23 displays the photographed image stored in step S11 on the display unit 25 for review for a predetermined time (several seconds) (step S16).

Further, when the positioning information added to the captured image is pseudo-range data for four satellites (step S17: YES), the control unit 23 obtains (records) high-precision positioning information on the review image. A third message prepared in advance corresponding to the case is displayed (step S18). The third message is, for example,
“It takes about 1 minute to determine the location. You can move the location, but do not turn off the power for a while.”
It is a message with the content. That is, it is a message that reports to the photographer that only the positioning information necessary for position calculation has been acquired, and at the same time has advice regarding the correspondence after the photographing.

  And the control part 23 waits for progress of the display time of a review image, and returns to the process of step S1.

On the other hand, when the positioning information added to the photographed image is pseudo-range data for three satellites or the like (step S17: NO), the control unit 23 obtains (records) low-precision positioning information on the review image. A fourth message prepared in advance corresponding to the case is displayed (step S19). The fourth message is, for example,
“It takes about a minute to fix the position. You can move the place, but please do not turn off the power for a while. If you take a picture without moving the place, the position will be accurate with the next shot. You may be able to confirm. "
It is a message with the content. In other words, this is a message that reports to the photographer that only the positioning information necessary for position calculation can be acquired and that it is of low accuracy, and at the same time contains advice on correspondence after photographing.

  And the control part 23 waits for progress of the display time of a review image, and returns to the process of step S1.

  Further, unlike the above-described processing, when even pseudo distance data cannot be acquired at the time of shooting (step S14: NO), the control unit 23 immediately stores the shot image acquired at step S3 (step S20). That is, the control unit 23 causes the image memory 24 to store a still image file in which attribute information such as a shooting date and time and shooting conditions not including the latitude and longitude of the shooting position is added to the compressed image data of the shot image.

  Thereafter, the control unit 23 displays the stored photographed image on the display unit 25 for review for a predetermined time (several seconds) (step S21).

Further, the control unit 23 displays a fifth message prepared in advance when neither position data nor pseudorange data can be acquired, that is, when positioning is impossible (step S22). The fifth message is, for example,
“Position information cannot be acquired. Will you replace it with location information from past images?”
It is a message with the content. That is, it is a message that informs the photographer that positioning is impossible, and at the same time, specifies whether to replace the position information added to the current photographed image with the position information of the past photographed image.

  Subsequently, if the photographer does not give an instruction (predetermined key operation) to add alternative position information to the current photographed image (step S23: NO), the control unit 23 waits for the review image display time to elapse. Then, the process returns to step S1.

  In addition, when there is an instruction to add alternative position information by the photographer (step S23: YES), the control unit 23 captures images that have been captured within a predetermined past time among recorded images that include position data. A list of images is displayed on the display unit 25, and the photographer is allowed to select an image photographed at the same or almost the same location as the current photographing location (step S24).

  Thereafter, the control unit 23 adds the position data added to the photographed image selected by the photographer to the current photographed image (step S25). Thereafter, the control unit 23 returns to the process of step S1.

  On the other hand, as described above, in the process of step S8, the first message prepared in advance corresponding to the case where high-accuracy position information has been acquired (recorded) is displayed over the review image. Thereafter, the control unit 23 performs the following processing shown in FIG.

  First, the control unit 23 adds position specifying information other than high-precision position data, that is, position information such as low-precision position data or pseudo-distance data, among the captured images stored in the image memory 24. It is confirmed whether or not a captured image exists (step S9).

  If there is no corresponding captured image (step S9: NO), the control unit 23 immediately returns to the process of step S1. Further, if there is a corresponding captured image (step S9: YES), the control unit 23 displays a list of the corresponding captured images as position information correction candidates on the display unit 25 and sets one or a plurality of position information as correction targets. The photographer is instructed to take a photographed image (step S10).

  Then, when the photographer designates a photographic image to be corrected (step S11: YES), the control unit 23 currently acquires low-accuracy position data or positioning information added to the designated photographic image. The position data is corrected (step S12). Thereafter, the control unit 23 returns to the process of step S1.

  Further, when the photographer does not instruct the photographed image whose position information is to be corrected, that is, when there is an instruction that does not require correction (step S11: NO), the control unit 23 immediately proceeds to the process of step S1. Return.

  On the other hand, FIG. 5 is a flowchart showing the contents of the position determination process in step S1 described above. In the position determination process, the control unit 23 first checks whether or not position data is currently acquired. If position data is not acquired (step S101: NO), the control unit 23 immediately returns to the main routine of FIG.

  When the position data is acquired (step S101: YES), the control unit 23 is captured in the image memory 24 within 2 hours, which is the time when the ephemeris acquired in the GPS unit 3 is valid. It is further confirmed whether or not a captured image to which pseudo distance data is added is stored, and if there is no corresponding captured image (step S102: NO), immediately go to the main routine of FIG. Return.

  In addition, when the corresponding captured image is stored in the image memory 24 (step S102: YES), the control unit 23 first calculates the position of the GPS unit 3 in the corresponding captured image. It is confirmed whether there is a photographed image that is not requested (step S103).

  If there is no photographed image for which position calculation has not yet been requested (step S103: NO), the control unit 23 immediately proceeds to the process of step S105.

  Conversely, if there is a captured image for which position calculation has not been requested yet (step S103: YES), the control unit 23 uses the pseudo-range data for three satellites or four satellites added to the corresponding captured image. The positioning information is sent to the GPS unit 3, and the calculation of the past position which is the past reception position of the GPS signal at the time when the photographed image is photographed, that is, the past photographing position is requested (step S104).

  Subsequently, the control unit 23 confirms whether or not the past position data regarding the captured image for which the calculation of the past position has already been requested has been acquired from the GPS unit 3, and if the past position data cannot be acquired (step S105: NO) ) Immediately return to the main routine of FIG.

  In addition, when the past position data can be acquired (step S105: YES), the control unit 23 acquires the positioning information such as the pseudo distance data added to the captured image corresponding to the acquired past position data. Data is rewritten (step S106). That is, it is added to the captured image instead of the original positioning information. Thereafter, the control unit 23 returns to the main routine of FIG.

  As described above, in the digital camera 1 of the present embodiment, the position data (position information) indicating the shooting position calculated by the GPS unit 3 at the time of shooting, or the pseudo-range data, the GPS signal reception time, and the satellite number are used. The specific positioning information is added to the captured image and recorded as position specifying information for specifying the shooting position where the shooting was performed.

  In the digital camera 1, when the position data is acquired at the time of shooting, if the acquired position data is highly accurate position data, the first message prepared in advance corresponding to the position data is immediately after shooting. If the acquired position data is low-accuracy position data, a second message prepared in advance corresponding to the position data is displayed immediately after shooting. In addition, when the positioning information is acquired at the time of shooting, if the acquired positioning information is high-accuracy positioning information, a corresponding third message prepared in advance is displayed immediately after shooting and acquired. When positioning information with low accuracy can be acquired, the fourth message prepared in advance corresponding to the positioning information is displayed immediately after shooting.

  In other words, immediately after shooting, the photographer is not only notified of the success or failure of acquisition (recording) of position specifying information at the time of shooting, but when the position specifying information can be acquired (recorded), the type of position specifying information is selected. You can be notified immediately. Therefore, the convenience of the photographer at the time of photographing can be improved.

  In addition, the photographer can be informed not only of the type of the position specifying information acquired but also the accuracy of the position specifying information, that is, the specifying accuracy of the shooting position specified by the position specifying information. Therefore, much higher convenience can be ensured.

  Further, in the digital camera 1, when the position specifying information acquired at the time of shooting is low-accuracy position data, the second message displayed immediately after shooting includes advice regarding the response after shooting. Therefore, the photographer can know what to do in order to add highly accurate position information to the photographed image. This also improves the convenience of the photographer at the time of photographing.

  Further, in the digital camera 1, when the position data can be acquired by the GPS unit 3, the GPS unit 3 is based on positioning information such as pseudo distance data added to the captured image captured within the past two hours. Then, a past photographing position at the time when the photographed image is photographed is calculated, and the calculation result (past position data) is added to the photographed image instead of the original positioning information.

  Therefore, even for a captured image for which position data indicating the shooting position cannot be acquired at the time of shooting, position data can be automatically added with high probability without any burden on the user such as a photographer after shooting. .

  In addition, the message (third and fourth messages) displayed when the position specifying information acquired at the time of shooting is either high-precision or low-accuracy positioning information depends on the type of the acquired position specifying information. Advice on different post-shooting responses. Therefore, the photographer can know what to do when the position specifying information acquired at the time of photographing is either high-precision or low-precision positioning information. Therefore, it is possible to improve the convenience of the photographer when the position data indicating the photographing position cannot be acquired at the time of photographing.

  Note that the processing for automatically changing the positioning information added to the photographed image to position data as described above (position determination processing in FIG. 5) is not limited to the time when the recording mode is set. The GPS unit 3 may perform the positioning operation while the camera is set, so that it may be performed in the reproduction mode or during the operation of the digital camera 1 regardless of the operation mode.

  Also, in the digital camera 1, when neither position data nor positioning information can be acquired at the time of shooting, a fifth message prepared in advance corresponding to the case where positioning is impossible is displayed, and then control is performed. The unit 23 performs the processing from step S23 to step S25. In other words, the position data added to the specific photographed image selected by the photographer is added to the newly photographed photographed image among the photographed images photographed within the past fixed time and the position data added. . Therefore, it is possible to add position data to a photographed image that cannot be measured at the time of photographing simply by allowing the user to perform a simple selection operation.

  In the present embodiment, as described above, the position data to be added to the newly photographed image is added to the photographed image that has been photographed within the past fixed time and selected by the photographer. For example, position data added to a newly captured image may be limited to only high-accuracy position data.

  In the present embodiment, the position data added to the photographed image selected by the photographer is used as the position data to be added to the newly photographed image as described above. For example, position data that is added to a captured image with the latest photographing time within a certain past time may be automatically used.

  In the digital camera 1, when high-accuracy position data can be acquired at an arbitrary shooting time point, the control unit 23 performs steps S9 to S12. In other words, the photographer selects a captured image to which position specifying information (low-accuracy position data or positioning information) other than high-accuracy position data is added, and the photographer selects low-accuracy added to the selected photographed image. The position data or the positioning information is corrected to the highly accurate position data acquired at the time of the current photographing.

  Therefore, it was possible to add a captured image that could only add low-precision position data at the time of shooting or the position determination process of FIG. 5 and high-precision or low-accuracy positioning information at the time of shooting. For example, since the power has been turned off for two hours or more, a highly accurate position can be obtained by simply allowing the user to perform a simple selection operation on a photographed image or the like that has not been processed during the position determination process in FIG. Data can be added.

  In the present embodiment, all the captured images to which position specifying information (low-precision position data or positioning information) other than high-accuracy position data is added are selected candidates, and the shooting is to be corrected for the position specifying information. The photographer selected the image, but for example, the above selection candidates may be only the photographed image excluding the photographed image with elapsed time from photographing within 2 hours from the photographed image to which the positioning information is added. .

  On the other hand, in the present embodiment described above, high-accuracy position data based on the position of four or more satellites or position data of three satellites as position data (position information) indicating the photographing position calculated by the GPS unit 3 at the time of photographing. High-precision positioning information consisting of pseudo-satellite data for four satellites or pseudo-range data for three satellites as specific positioning information consisting of pseudo-range data, etc. The thing which acquires the low-precision positioning information which consists of etc. was demonstrated.

  However, when implementing the present invention, at the time of shooting, only high-precision position data is acquired as position data indicating the shooting position, and only high-precision positioning information is acquired as positioning information including pseudorange data. It may be adopted. Further, when implementing the present invention, a configuration is adopted in which the user can set to acquire both accuracy and low accuracy as position data or positioning information as in the present embodiment as necessary. May be.

  Further, in the present embodiment, the position specifying information acquired at the time of shooting is added to the shot image and recorded, that is, recorded in the still image file integrally with the shot image. The position specifying information acquired at the time of shooting may be recorded in another data file or the like different from the still image file as long as the correspondence with the shot image can be secured.

  In addition, the present invention may be a lens-integrated general digital camera, a digital camera built in another portable information device such as a cellular phone terminal, or the like as long as it has a positioning function by GPS, It can also be applied to a digital video camera capable of taking a still image.

DESCRIPTION OF SYMBOLS 1 Digital camera 2 Camera part 3 GPS part 4 Power supply part 5 Antenna 21 Imaging part 22 Image processing part 22 Display part 23 Control part 23a Built-in clock 24 Image memory 25 Display part 26 Key input part 27 Power key 28 Shutter key 31 Receiving part 32 Calculation unit 33 GPS memory

Claims (11)

Photographing means for recording a photographed image photographed in accordance with a photographing instruction on a recording medium;
After receiving radio waves sent from multiple satellites and obtaining specific positioning information necessary to calculate the position information indicating the reception position of the radio waves, the position information is calculated using the specific positioning information. Positioning means for executing the positioning process ;
Information acquisition means for acquiring the position information or the specific positioning information as different types of position specifying information according to the progress of the positioning process by the positioning means at the time of shooting by the shooting means;
Position information recording means for recording the position specifying information acquired by the information acquisition means in association with a photographed image photographed by the photographing means;
And confirmation means for confirming the type of location specific information acquired in accordance with the progress of the positioning processing by the information acquisition means,
Display control means for selectively displaying one of a plurality of messages prepared in advance corresponding to the type of position specifying information confirmed by the confirmation means at the time of photographing by the photographing means. A digital camera characterized by The positioning means receives radio waves sent from a plurality of satellites and uses the specific positioning information already recorded in association with the captured image to receive the received position of the radio waves captured when the captured image is captured. Calculate location information indicating
The information acquisition unit is configured to detect the radio wave received when the captured image is captured according to the progress of the positioning process performed by the positioning unit after the positioning information is recorded in association with the captured image by the position information recording unit. Obtain location information indicating the reception location,
The position information recording unit records the position information acquired by the information acquisition unit in association with a captured image in which specific positioning information has already been recorded.
The digital camera according to claim 1. The positioning means can improve the accuracy of the position specifying information as the number of satellites that have received radio waves at the same radio wave reception position increases.
The digital camera according to claim 1, wherein the message corresponding to the type of position specifying information with low accuracy includes a message for suppressing movement from the current position to the user. The positioning means acquires a pseudo distance to each satellite based on radio waves sent from each satellite as the specific positioning information, and then based on navigation data sent from each satellite and the pseudo distance. , Calculate the location information indicating the reception position of the radio wave from the satellite,
The digital camera according to any one of claims 1 to 3, wherein the message when the type of position specifying information is a pseudo-range includes a message for suppressing power-off to the user. 5. The digital camera according to claim 1, wherein the message corresponding to the type of the position specifying information includes the accuracy of the position specifying information. The digital camera according to claim 1 , wherein the message corresponding to the type of the position specifying information includes advice regarding correspondence after shooting according to the type of the position specifying information. When the position information can be acquired as position specifying information by the positioning means, the positioning means is based on the positioning information recorded in the recording medium in association with the photographed image taken within a predetermined period. A calculation control means for calculating the position information indicating a past shooting position at the time of shooting of the shot image associated with the positioning information;
Claims the calculation control means the position information is calculated in the positioning means, characterized in that a position determining means for recording on the recording medium in place of the original positioning information used in the calculation of the position information Item 7. The digital camera according to any one of Items 1 to 6 . When the position specifying information is not acquired by the positioning means at the time of shooting, the position specifying information recorded on the recording medium in association with a specific shot image shot in the past is related to the newly shot shot image. 8. The digital camera according to claim 1, further comprising recording control means for recording on a recording medium. When the position information with high accuracy is acquired as position specifying information by the positioning means at the time of shooting, a position other than the position information with high accuracy recorded in a recording medium in association with a specific shot image shot in the past 9. The digital camera according to claim 1 , further comprising correction means for correcting the specific information to the highly accurate position information acquired at the time of photographing. Shooting processing for recording a shot image shot according to a shooting instruction on a recording medium;
After receiving radio waves sent from multiple satellites and obtaining specific positioning information necessary to calculate the position information indicating the reception position of the radio waves, the position information is calculated using the specific positioning information. Positioning process,
Information acquisition processing for acquiring the position information or the specific positioning information as different types of position specifying information according to the progress of the positioning process at the time of shooting by the shooting process ;
A position information recording process for recording the position specifying information acquired by the information acquisition process in association with the captured image captured by the imaging process;
A confirmation process for confirming the content of the position specifying information acquired according to the progress of the positioning process by the information acquisition process ;
A display control process for selectively displaying one of a plurality of messages prepared in advance corresponding to the type of position specifying information confirmed by the confirmation process at the time of photographing by the photographing process. Message display method. The computer that the digital camera has,
Photographing means for recording a photographed image photographed in accordance with a photographing instruction on a recording medium;
After receiving radio waves sent from multiple satellites and obtaining specific positioning information necessary to calculate the position information indicating the reception position of the radio waves, the position information is calculated using the specific positioning information. Positioning means for executing the positioning process ;
Information acquisition means for acquiring the position information or the specific positioning information as different types of position specifying information according to the progress of the positioning process by the positioning means at the time of shooting by the shooting means;
Position information recording means for recording the position specifying information acquired by the information acquisition means in association with a photographed image photographed by the photographing means;
And confirmation means for confirming the type of location specific information acquired in accordance with the progress of the positioning processing by the information acquisition means,
At the time of photographing by the photographing means, it functions as a display control means for selectively displaying one of a plurality of messages prepared in advance corresponding to the type of position specifying information confirmed by the confirmation means. A program characterized by that.

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