JP2006222503A - Method, device and program for reproducing continuous photographed image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide method, device and program for reproducing continuous photographed image, in which an image file can be surely reproduced, at interval corresponding to the continuous photographing interval. <P>SOLUTION: The method for reproducing continuous photographed image comprises a step of deciding the continuous photographing interval of a plurality of image files created by continuous photographing, based on the photography date information indicating the date of producing the image file and the number of image files, and a step of sequentially reproducing the plurality of image files at the continuous photographing interval thus decided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a continuous image reproduction method, a continuous image reproduction device, and a continuous image reproduction program.

Conventionally, a continuous shooting function of a digital camera that continuously generates image files by repeating imaging processing at short time intervals is known.
Patent Document 1 describes a digital camera that reproduces a plurality of image files generated by a continuous shooting function according to a continuous shooting interval. However, the digital camera described in Patent Document 1 has a problem that in other systems, an image file generated in the high-speed continuous shooting mode cannot be reproduced according to the continuous shooting interval. The reason is as follows. In the digital camera described in Patent Document 1, it is determined whether the image file is generated in the high-speed continuous shooting mode or the low-speed continuous shooting mode, and the image file generated in the high-speed continuous shooting mode is determined in advance. Play back during the playback period. However, in the recording format of a standard digital camera such as EXIF, a header for identifying the high-speed continuous shooting mode and the low-speed continuous shooting mode is not defined, so that it is generated by the digital camera described in Patent Document 1. The system that can determine whether the image file generated in the high-speed continuous shooting mode or the low-speed continuous shooting mode is limited. Further, according to the method described in Patent Document 1, in a system in which a continuous shooting interval of a digital camera is not registered, it is impossible to reproduce an image file at the continuous shooting interval of the digital camera. Furthermore, in an image file recorded in a standard format such as EXIF, although shooting date / time information is recorded in the header, shooting date / time information is rarely recorded with an accuracy of less than a second. Therefore, even if an image file is to be reproduced at a continuous shooting interval based on the shooting date / time information, the image file cannot be played back according to the continuous shooting interval as long as the shooting date / time information indicates the same date / time with second accuracy.

Japanese Patent Laid-Open No. 2003-224752 JP 2000-162716 A

  The present invention has been created in view of the above-described problems, and includes a continuous-shot image playback method, a continuous-shot image playback device, and a continuous-shot image playback program capable of reliably playing back an image file at intervals corresponding to the continuous shooting interval. The purpose is to provide.

(1) In the continuous image reproduction method for achieving the above object, the continuous shooting interval of a plurality of image files generated by continuous shooting is set to the shooting date / time information indicating the generation date / time of the image file and the number of the image files. And a step of sequentially reproducing the plurality of image files at the determined continuous shooting interval.
In general, shooting date and time information is recorded in a standardized standard format in an image file generated by a digital camera. In general, the file generation date and time managed by the file system is the same as the shooting date and time in a digital camera. According to the present invention, since the continuous shooting interval of a plurality of image files generated by continuous shooting is determined based on the shooting date / time information of the image file and the number of series of image files generated by the continuous shooting, Even if the image files indicate the same date and time, they can be reliably reproduced at intervals according to the continuous shooting interval.

(2) In the step of determining the continuous shooting interval, if the time interval indicated by the shooting date and time information of the plurality of image files is longer than 1 second and equal to or less than a predetermined standard reproduction period, The time interval indicated by the shooting date / time information may be determined as the continuous shooting interval.
According to the present invention, when the true continuous shooting interval is longer than 1 second, the image file can be reproduced at an interval exactly equal to the true continuous shooting interval.

(3) In the step of determining the continuous shooting interval, in the step of determining the continuous shooting interval, if the time interval indicated by the shooting date / time information of the plurality of image files is 1 second or less, the shooting date / time information is The reciprocal (second) of the number of the image files indicating the same date and time with second accuracy may be determined as the continuous shooting interval.
According to the present invention, even when shooting date / time information is not recorded with an accuracy of less than 1 second, an image file can be reproduced at an interval corresponding to a continuous shooting interval.

(4) In the step of determining the continuous shooting interval, the time interval indicated by the shooting date and time information is 1 second or less, and the period from the first date and time of the second accuracy indicated by the shooting date and time information to the last date and time of the second accuracy Among the plurality of image files having a duration of 3 seconds or more, the reciprocal number (seconds) of the number of the image files indicating the same date and time when the shooting date and time information is neither the first date nor the last date and time is accurate. It may be determined that the interval is a shooting interval.
At the time immediately after the start of continuous shooting and immediately before the end of continuous shooting, there may be a possibility that fewer image files are generated than the number of image files that can be generated per second by continuous shooting. According to the present invention, since the continuous shooting interval is determined except for image files generated immediately after the start of continuous shooting and immediately before the start of continuous shooting, the image file can be reproduced at an interval that is exactly equal to the true continuous shooting interval. it can.

(5) In the step of determining the continuous shooting interval, if the time interval indicated by the shooting date / time information of the plurality of image files is 1 second or less, the image file indicating the same date / time with the second shooting accuracy. Is calculated as a provisional continuous shooting time, the model that generated the image file is specified based on the model information stored in the image file, and the known continuous shooting interval is associated with the model. The known continuous shooting interval corresponding to the specified model is acquired from the registered database, and the shorter than the known continuous shooting interval or the temporary continuous shooting interval acquired from the database, the shorter the continuous shooting interval. The known continuous shooting interval corresponding to the specified model may be updated to the determined continuous shooting interval.
According to the present invention, the known continuous shooting interval of the database is updated to an interval that is most likely to be exactly equal to the true continuous shooting interval, and the most probable value is linked from the database thus updated and the shooting date / time information. Since it is specified as the shooting interval, the image file can be reproduced at an interval most likely to be exactly equal to the true continuous shooting interval.

(6) In the step of determining the continuous shooting interval, if the time interval indicated by the shooting date / time information of the plurality of image files is 1 second or less, the time interval indicated by the shooting date / time information is 1 second or less. Among the plurality of image files in which the period from the first date and time of the second precision indicated by the shooting date and time information to the last date and time of the second precision is 3 seconds or more, the shooting date and time information is the second date and the first date and time. The reciprocal number (seconds) of the plurality of image files indicating the same date and time that is not the last date and time is determined as the continuous shooting interval, and the known continuous shooting interval corresponding to the specified model is determined. You may update to
According to the present invention, once an image file group in which the period between the first date and time of the second precision indicated by the shooting date and time information and the last date and time of the second precision is 3 seconds or more is processed, the model that generated the image file group Then, the image file can be played back at an interval that is exactly equal to the true continuous shooting interval.

(7) A continuous image reproduction device for achieving the above object sets the continuous shooting interval of a plurality of image files generated by continuous shooting to shooting date / time information indicating the generation date / time of the image file and the number of the image files. Determination means for determining based on, and reproduction means for sequentially reproducing the plurality of image files at the determined continuous shooting interval.
According to the present invention, the continuous shooting interval of a plurality of image files generated by continuous shooting is determined based on the shooting date and time information stored in the image file and the number of a series of image files generated by continuous shooting. Even image files whose shooting date / time information indicates the same date / time can be reliably reproduced at intervals corresponding to the continuous shooting interval.

(8) A continuous image reproduction program for achieving the above object sets the continuous shooting interval of a plurality of image files generated by continuous shooting to shooting date / time information indicating the generation date / time of the image file and the number of the image files. The computer is caused to function as a determination unit that performs determination based on the reproduction unit that sequentially reproduces the plurality of image files at the determined continuous shooting interval.
According to the present invention, since the continuous shooting interval of a plurality of image files generated by continuous shooting is determined based on the shooting date / time information of the image file and the number of series of image files generated by the continuous shooting, Even if the image files indicate the same date and time, they can be reliably reproduced at intervals according to the continuous shooting interval.

  It should be noted that the order of each operation of the method described in the claims is not limited to the order of description as long as there is no technical obstruction factor, and may be executed in any order, or may be executed simultaneously. Also good. In addition, each function of the plurality of means provided in the present invention is realized by a hardware resource whose function is specified by the configuration itself, a hardware resource whose function is specified by a program, or a combination thereof. The functions of the plurality of means are not limited to those realized by hardware resources that are physically independent of each other. The present invention can also be specified as an invention of a recording medium on which a program is recorded.

Embodiments of the present invention will be described below based on examples.
FIG. 2 is a block diagram showing a PC (Personal Computer) 1 as a continuous shot image reproducing apparatus according to an embodiment of the present invention. The PC 1 has a so-called slide show function for continuously displaying a plurality of image files acquired from the digital camera 6 on the display 7.
The interface unit 16 includes a USB controller and a USB connector for communicating with the digital camera 6, a removable memory controller for reading data stored in a removable memory (not shown), a modem for transmitting and receiving data via the Internet, and the like. Prepare. An image file generated by the digital camera 6 is input to the PC 1 via a USB cable, a removable memory, the Internet, or the like.

The hard disk device 18 stores a slide show program and OS for causing the PC 1 to function as a continuous image reproduction device.
The ROM 20 is a non-volatile memory that stores a startup program of the PC 1 and the like.
The CPU 14 serving as a determination unit and a reproduction unit executes programs stored in the ROM 20 and the hard disk device 18 to control each unit of the PC 1. The CPU 14 operates according to commands input by the mouse 3 and the keyboard 2.
The RAM 12 is a volatile memory that temporarily stores programs and data.
The display control unit 10 as a reproduction unit includes a graphic controller, a frame memory, and the like, and displays a display target image stored in the frame memory on a display 7 as a reproduction unit.

FIG. 3 is a block diagram showing a configuration of a slide show program for causing the PC 1 to function as a continuous image playback device. The slide show program corresponds to a continuous image reproduction program.
The UI module 28 is a program component for receiving selection of a reproduction target image file. Specifically, for example, the UI module 28 receives a designation of a directory, a designation of a reproduction target image file stored in the directory, and an instruction to start a slide show via the mouse 3 and the keyboard 2.

The reproduction period setting module 24 is a program component that causes the PC 1 to function as a determination unit. The reproduction period setting module 24 analyzes the header of the reproduction target image file and sets the reproduction period (corresponding to the continuous shooting interval) of each reproduction target image file.
The database 22 stores model information and known continuous shooting intervals in association with each other. The model information is information for specifying the model of the digital camera and includes a manufacturer name, a model number, a model name, and the like. The known continuous shooting interval is data indicating the continuous shooting interval of the corresponding digital camera. The database 22 is recorded on the hard disk device 18 when the slide show program is installed. The database 22 is updated by the reproduction period setting module 24. The database 22 can be updated by communication with a server via a communication line such as the Internet. In the database 22, a plurality of known continuous shooting intervals may be registered for each model. For example, a known continuous shooting interval for each mode can be registered in the database 22 for a digital camera having a high-speed continuous shooting mode and a low-speed continuous shooting mode.

  The playback module 26 is a program component that causes the PC 1 to function as playback means. The playback module 26 performs decompression processing, color space conversion processing, resolution conversion processing, and the like on the image data stored in various formats in the playback target image file, and the image data subjected to these processing is framed. The data is written in the memory and displayed on the display 7.

FIG. 4 is a flowchart showing the flow of processing of the above-described slide show program. The PC 1 starts the process shown in FIG. 4 when an instruction to start a slide show is received. FIG. 5 is a table showing information referred to and set information in the processing shown in FIG.
The PC 1 repeats the analysis of the header of the reproduction target image file and the setting of the reproduction period as follows until the setting of the reproduction period for all the reproduction target image files is completed (step S100).

  In step S102, the PC 1 acquires shooting date / time information from the next reproduction target image file. Specifically, for example, the PC 1 specifies a playback target image file to be processed in the order sorted by file name, shooting date and time. The shooting date / time information is data indicating the shooting date / time, that is, the date / time when the image file is generated by the digital camera. For example, since the data format and storage location of the shooting date / time information is defined by EXIF, which is a standard data format standard for digital cameras, the PC 1 can acquire the shooting date / time information from the reproduction target image file according to the EXIF standard. it can. Note that the shooting date / time information may be recorded in any structure as long as the data structure of the image file is known.

  In step S104, the PC 1 sets the reproduction period of the current reproduction target image file as the standard reproduction period. The standard playback period may be a period set in advance in the slide show program or a period specified by the user. In this embodiment, the standard reproduction period is 3 seconds. The “current reproduction target image file” referred to here is an image file from which shooting date / time information has been acquired in step S102. "Current playback target image file", "Next playback target image file", and "Previous playback target image file" described later are pointers indicating "Current playback target image file" in the list of playback target image files. Can be specified every time the shooting date / time information is acquired.

  In step S106, the PC 1 determines whether or not the time interval indicated by the shooting date / time information of the immediately preceding reproduction target image file and the current reproduction target image file is 1 second or less. For example, when the file name of the current playback target image file is “003” and the file name of the previous playback target image file is “002”, the time interval indicated by the shooting date / time information of these files is 0 second. The PC 1 proceeds to the process of step S108. At this time, the reproduction period of the current reproduction target image file “003” is set to 3 seconds by the process of step S104. The immediately preceding reproduction target image file here is an image file in which shooting date / time information is acquired immediately before acquisition of shooting date / time information in step S102. The reason for setting the determination criterion to 1 second is that, in general, a digital camera accurately records shooting date / time information up to the second accuracy. Therefore, if the shooting interval between two continuously recorded image files is longer than 1 second, This is because the shooting interval can be accurately specified directly from the shooting date / time information.

  When the time interval indicated by the shooting date / time information of the immediately preceding reproduction target image file and the current reproduction target image file is 1 second or less, in step S108, the PC 1 determines whether the shooting date / time information is recorded with an accuracy of less than a second. Determine. For example, since the shooting date / time information of the current reproduction target image file “003” is not recorded with sub-second accuracy, the PC 1 proceeds to the process of step S116. If all the shooting date and time information recorded by one digital camera has the same value in less than a second, it can be determined that the shooting date and time information is not recorded with an accuracy of less than a second. For example, if recording accuracy is recorded as an attribute of shooting date / time information, the accuracy of shooting date / time information can be determined by referring to the attribute.

If the shooting date / time information is not recorded with an accuracy of less than a second, in step S116, the immediately preceding reproduction target image file is registered as a continuous shooting file. For example, the immediately preceding reproduction target image file “002” is registered as a continuous shooting file.
In step S118, the PC 1 acquires shooting date / time information from the next reproduction target image file. For example, “January 1, 12:00:01” is acquired as the shooting date / time information from the reproduction target image file “004” next to the reproduction target image file “003”.

  In step S120, the PC 1 determines whether or not the time interval indicated by the shooting date / time information of the immediately preceding reproduction target image file and the current reproduction target image file is 1 second or less. The “current reproduction target image file” referred to here is an image file from which shooting date / time information has been acquired in step S118. The “previous playback target image file” is an image file whose shooting date / time information is acquired immediately before the shooting date / time information is acquired in step S118. For example, the shooting date / time information of the reproduction target image file “004” from which the shooting date / time information was acquired in step S118 and the playback target image file “003” from which the shooting date / time information was acquired immediately before (step S102 in this case) are indicated. Since the time interval is 1 second, the PC 1 proceeds to the process of step S116. Thereafter, the reproduction target image file “003” is registered as a continuous shooting file in step S116. Thereafter, the processes of steps S116, S118, and S120 are repeated, and the reproduction target files “004”, “005”, and “006” are registered as continuous shooting files. At this time, the file name of “current reproduction target image file” is “008”, and the time interval indicated by the shooting date and time information of the reproduction target image files “007” and “008” is 9 minutes 58 seconds. The process proceeds to step S122. If there is no next reproduction target image file in step S118, the PC 1 proceeds to the process of step S122. For example, in a state where the “current playback target image file” is the image file “202”, the PC 1 proceeds to the process of step S122, and in step S122, the image file “202” is processed as “the previous playback target image file”. To do.

In step S122, the PC 1 registers the immediately preceding reproduction target image file as a continuous shooting file. Of the image file group generated by continuous shooting by this processing, the image file generated last is registered as a continuous shooting file. For example, the immediately preceding reproduction target file “007” and the reproduction target file “202” are registered as continuous shooting files.
When the registration of the series of continuous shooting files is completed, the PC 1 calculates and sets the playback period of the playback target image file registered as a series of continuous shooting files in step S124. FIG. 1 is a flowchart showing the flow of this process.

  In step S200, it is determined whether or not the shooting date and time information of the reproduction target image file registered as a series of continuous shooting files extends over 3 seconds. For example, the shooting date and time information of the reproduction target image files “002”, “003”, “004”, “005”, “006”, and “007” registered as a series of continuous shooting files is “January 1 12:00. Since it spans 3 seconds from “1 minute 12:00” to “January 1st, 12:00:02”, PC1 performs step in a state where a series of continuous shooting files including the image file “007” are processed. The process proceeds to S202. The shooting date and time information of the reproduction target image files “201” and “202” registered as continuous shooting files is from “January 9, 10:00:00” to “January 9, 10:00:01”. Therefore, in a state where a series of continuous shooting files including the image file “202” are being processed, the PC 1 proceeds to the process of step S204.

  In step S202, the PC 1 uses the reciprocal of the number of files with the same shooting date / time for the continuous shooting image file whose shooting date / time information is other than the first and last date / time as the temporary playback period ( Equivalent to provisional continuous shooting interval). For example, of the continuous shot image files “002”, “003”, “004”, “005”, “006”, “007”, the shooting date / time information indicates “January 1, 12:00:01”. 1/3 (seconds) which is the reciprocal (second) of the number “3” of the target image files “004”, “005”, “006” is the reproduction target image files “002”, “003”, “004”, “ “005”, “006”, and “007” are set as temporary reproduction periods.

  In step S204, the PC 1 has the smaller reciprocal of the number of continuous-shot image files whose shooting date / time information indicates the first date / time or the reciprocal of the number of continuous-shot image files whose shooting date / time information indicates the last date / time (with the same value). Is set as a temporary reproduction period of the reproduction target image file registered as a continuous shooting file. For example, among the continuous shot image files “201” and “202”, the reciprocal of the file number of the reproduction target image file “201” in which the shooting date and time information indicates the first date and time “January 9, 10:00:00” is 1. Since the reciprocal of the file number of the reproduction target image file “202” in which the shooting date and time information indicates the last date and time “January 9, 10:00:01” is 1, the reproduction target image files “201” and “201” 202 ”is set to 1.

  In step S206, the PC 1 acquires model information from the continuous shot image file. For example, the model information “A” is acquired from the reproduction target image file “002”, and the model information “C” is acquired from the reproduction target image file “201”. This process is performed in order to execute a subsequent process for specifying the most likely continuous shooting interval for the model of the digital camera that generated the continuous shooting image file.

  In step S208, the PC 1 determines whether a known continuous shooting interval corresponding to the model information acquired in step S206 is registered in the database 22 (see FIG. 3). For example, since the PC 1 does not register the known continuous shooting interval corresponding to the database 22 for the continuous shooting image files “002”, “003”, “004”, “005”, “006”, and “007”, the step The process proceeds to S214. Further, since the known continuous shooting interval “1/10” corresponding to the database 22 is registered for the continuous shot image files “201” and “202”, the PC 1 proceeds to the process of step S210.

  In step S210, the PC 1 determines whether the known continuous shooting interval registered in the database 22 is shorter than the temporary reproduction period. For example, for the continuous shot image files “201” and “202”, the known continuous shooting interval (1/10 second) registered in the database 22 is shorter than the provisional reproduction period (1 second), so that the PC 1 performs step S212. Proceed to the process.

  When the known continuous shooting interval registered in the database 22 is shorter than the provisional playback period, the PC 1 sets the playback period of the playback target image file registered as the continuous shooting file in step S212 to the corresponding known registration registered in the database 22. Set to the continuous shooting interval. For example, the playback period of the playback target image file “201” is set to 1/10. In the present embodiment, the playback period of the playback target image file whose shooting date / time information indicates the last date / time in the continuous shooting file is set to the standard playback period, but the playback period of a series of continuous shooting files is all equal. It may be set. For example, in the present embodiment, for the last reproduction target image files “007” and “202” among the continuous shot image files, the reproduction period is set to 3 (seconds) which is the standard reproduction period. The reproduction period of the file “007” may be set to 1/3 (second), and the reproduction period of the reproduction target image file “202” may be set to 1/10 (second).

  When the known continuous shooting interval registered in the database 22 is equal to or longer than the temporary reproduction period and when the known continuous shooting interval corresponding to the model information is not registered in the database 22, the PC 1 registers as a continuous shooting file in step S214. The playback period of the playback target image file is set as a temporary playback period. For example, the reproduction period of the reproduction target image files “002”, “003”, “004”, “005”, and “006” registered as a continuous shooting file is set as a temporary reproduction period 1/3 (second) Set to. As described above, the playback period of the last continuous shooting file “007” is set to the standard playback period.

  In step S216, the PC 1 updates the known continuous shooting interval of the corresponding model with the temporary reproduction period. For example, the known continuous shooting interval corresponding to the model information “A” of the continuous shooting files “002”, “003”, “004”, “005”, “006”, “007” is set to 1/3 (second). (See FIG. 6). By this processing, the known continuous shooting interval registered in the database 22 is updated to the most probable value. That is, the known continuous shooting interval set based on a small number of continuous shooting files is then updated to a more probable value based on a larger number of continuous shooting files. When the number of image files generated per second is accurately acquired for a digital camera by the processing in step S202, the known continuous shooting interval updated in step S216 represents the accurate continuous shooting interval of the digital camera. It becomes.

Thereafter, returning to FIG. 4, the description of the reproduction process will be continued. When the reproduction period of the continuous shooting file is set in step S124, the PC 1 returns to the process of step S102.
If it is determined in step S108 that the shooting date / time information is recorded with an accuracy of less than 1 second, the PC 1 proceeds to the process of step S110. For example, when the “current reproduction target image file” is “101”, the PC 1 proceeds to the process of step S110.

  In step S110, the PC 1 sets the playback period of the immediately preceding playback target image file to the time interval indicated by the shooting date / time information of the immediately preceding playback target image file and the current playback target image file. For example, when the “current playback target image file” is “101”, the playback period of the playback target image file “100” that is “the previous playback target image file” is set to 1/5 (seconds). Similarly, the reproduction period of the reproduction target image files “101”, “102”, “103”, and “104” is set to 1/5 (second). The reproduction target image file “105” is generated by continuous shooting following the reproduction target image files “101”, “102”, “103”, and “104”. By the processing, the standard reproduction period is set in the reproduction period. Of course, as described above, the continuous shooting interval may be set as the playback period for the last playback target file generated by continuous shooting.

  If it is determined in step S106 that the time interval indicated by the shooting date / time information of the immediately preceding reproduction target image file and the current reproduction target image file is longer than 1 second, the PC 1 proceeds to the process of step S112. For example, when the “current playback target image file” is “009”, the time interval indicated by the shooting date and time information of the playback target image files “008” and “009” is 10 minutes, so the PC 1 performs the process of step S112. move on.

  In step S112, the PC 1 determines whether the time interval indicated by the shooting date / time information of the immediately preceding reproduction target image file and the current reproduction target image file is longer than the standard reproduction period. For example, when the “current playback target image file” is “010”, the time interval (2 seconds) indicated by the shooting date and time information of the playback target image files “009” and “010” is equal to or shorter than the standard playback period (3 seconds). Therefore, the PC 1 proceeds to the process of step S110, and sets the reproduction period of the reproduction target image file “009” to 2 seconds. If “009” is “previous playback target image file”, the playback period of “009” is set to 3 seconds of the standard playback period in step S104 and then reset to 2 seconds in step S110. Will be. When the “current playback target image file” is “009”, the time interval (10 minutes) indicated by the shooting date and time information of the playback target image files “008” and “009” is from the standard playback period (3 seconds). PC1 proceeds to the process of step S114.

In step S114, the PC 1 sets the playback period of the immediately preceding playback target image file as the standard playback period. For example, when “current reproduction target image file” is “009”, the reproduction period of the reproduction target image file “008” is set to 3 seconds.
When the setting of the playback period is completed for all playback target image files by repeating the above processing, the PC 1 proceeds to the process of step S126 and starts playback processing of the playback target image file.

FIG. 7 is a flowchart showing the flow of the reproduction process of the reproduction target image file.
The PC 1 repeats the following process until the reproduction of all the reproduction target files is completed (step S300).
In step S302, the PC 1 acquires thumbnail data from the next reproduction target image file. Specifically, the PC 1 specifies the playback target image file in the order sorted during the playback period setting process, accesses the hard disk device 18, and acquires thumbnail data from the specified file. If thumbnail data is not stored in the reproduction target image file, the processing from step S302 to step S306 is skipped.

In step S304, the PC 1 decodes the thumbnail data. Specifically, for example, the PC 1 decompresses thumbnail data in a format compressed in the JPEG format or the like, and converts the color space from YCbCr to RGB.
In step S306, the PC 1 displays the decoded thumbnail data on the display 7. Specifically, for example, the PC 1 converts the resolution of the decompressed thumbnail data according to the size of the display area, writes the thumbnail data with the converted resolution in the frame memory, and displays the thumbnail data on a predetermined display area of the display 7.

In step S308, the PC 1 sets the timer to the playback period set in the current playback image file, and starts counting down. The “current reproduction target image file” referred to here is an image file from which thumbnail data has been acquired in step S302.
In step S310, the PC 1 accesses the hard disk device 18 and acquires main image data from the current reproduction target image file.

  In step S312, the PC 1 decodes the main image data. Specifically, for example, the PC 1 expands main image data in a format compressed in the JPEG format or the like, and converts the color space from YCbCr to RGB. If uncompressed image data is stored in the display target image file, this process is unnecessary. Further, when RAW data is stored in the display target image file, development processing may be executed instead of this processing.

  In step S314, the PC 1 displays the decoded main image data on the display 7. Specifically, for example, the resolution of the decoded main image data is converted according to the size of the display area, and the main image data with the converted resolution is written in the frame memory and displayed on a predetermined display area of the display 7. As a result, the image displayed at the low resolution based on the thumbnail data is updated to the high resolution image displayed based on the main image data.

  In step S316, the PC 1 waits until the timer counting down from the reproduction period expires. During this time, an image is displayed on the display 7 based on the main image data. When the time-up is notified by interruption, the PC 1 returns to the process of step S300 and repeats the above-described reproduction process. As a result, the playback target image file generated by continuous shooting is displayed with frame advance at the continuous shooting interval, and when the continuous shooting interval is extremely short, multiple playback target image files are displayed on the screen like a movie. become.

  In the embodiment of the present invention described above, the image file is reproduced on the display 7, but the image file may be reproduced on the projection surface by the projector. In the above-described embodiment, the example in which the continuous-shot image reproduction device according to the present invention is applied to the PC 1 has been described. However, the present invention can also be applied to a digital still camera, a digital video camera, an image reproduction dedicated device, a mobile phone, and the like. it can. Specifically, for example, a continuous image reproduction program according to the present invention can be applied to a program for controlling the reproduction mode of a digital still camera. In the above-described embodiment, data representing the shooting date and time stored in the image file is used as shooting date and time information. However, the present invention is applied to a program for controlling the playback mode of a device that generates an image file such as a digital camera. If applicable, the recording date of the file managed by the OS may be used as the shooting date / time information. For example, the continuous image reproduction method of the present invention can be applied as a method of reproducing an image file in the Motion JPEG format recorded by a digital video camera having a variable frame rate. The image reproduction dedicated device is an electronic device specialized in storage and reproduction of digital images, for example, provided with a hard disk device, an LCD, and a simple operation panel. Moreover, the flow of the process described above is an example, and the embodiment of the present invention is naturally not limited to the above-described example. The continuous shooting interval is determined based on the shooting date and time information and the number of a series of image files generated by continuous shooting, and the image file is sequentially played back at the determined continuous shooting interval, so that it corresponds to the actual continuous shooting interval. All methods of sequentially reproducing image files at intervals are included in the technical scope of the present invention.

  According to the embodiment of the present invention described above, the image file playback period is set based on the shooting date / time information stored in the image file and the number of a series of image files generated by continuous shooting. When the continuous shooting interval cannot be specified based on the model information stored in the camera, the playback period is recorded in the image file in a vendor-specific format, or the shooting date / time information is not recorded with sub-second accuracy Even so, it is possible to sequentially reproduce the image files at intervals according to the continuous shooting interval. As a result, according to the embodiment of the present invention, it is possible to reduce the user's frustration by repeatedly reproducing similar images, and to reproduce continuously shot shooting scenes like moving images.

The flowchart which concerns on one Example of this invention. The block diagram which concerns on one Example of this invention. The block diagram which concerns on one Example of this invention. The flowchart which concerns on one Example of this invention. The table | surface which concerns on one Example of this invention. The table | surface which concerns on one Example of this invention. The flowchart which concerns on one Example of this invention.

Explanation of symbols

1: PC (continuous shot image reproduction device), 7: Display (reproduction means), 10: Display control unit (reproduction means), 14: CPU (determination means, reproduction means), 22: Database, 24: Reproduction period setting module (Determination means), 26: reproduction module (reproduction means)

Claims (8)

Determining a continuous shooting interval of a plurality of image files generated by continuous shooting based on shooting date and time information indicating the generation date and time of the image file and the number of the image files;
Sequentially playing the plurality of image files at the determined continuous shooting interval;
A continuous-shot image reproduction method comprising:   In the step of determining the continuous shooting interval, if the time interval indicated by the shooting date / time information of the plurality of image files is longer than 1 second and not more than a predetermined standard reproduction period, the shooting date / time of the plurality of image files is determined. 2. The continuous shot image reproduction method according to claim 1, wherein a time interval indicated by information is determined as the continuous shooting interval.   In the step of determining the continuous shooting interval, when the time interval indicated by the shooting date / time information of the plurality of image files is 1 second or less, the shooting date / time information indicates the number of image files indicating the same date / time with second accuracy. The continuous shot image reproduction method according to claim 1, wherein the reciprocal (second) is determined as the continuous shooting interval.   In the step of determining the continuous shooting interval, the time interval indicated by the shooting date and time information is 1 second or less, and the period from the first date and time of the second accuracy indicated by the shooting date and time information to the last date and time of the second accuracy is 3 seconds. Among the plurality of image files as described above, the repetitive number (seconds) of the number of the image files indicating the same date and time when the shooting date and time information is neither the first date nor the last date and time with second accuracy is the continuous shooting interval. The continuous shot image reproduction method according to claim 1 or 2, wherein the determination is performed. In the step of determining the continuous shooting interval, when the time interval indicated by the shooting date and time information stored in the plurality of image files is 1 second or less,
The reciprocal number (seconds) of the number of the image files in which the shooting date and time information indicates the same date and time with second accuracy is calculated as a temporary continuous shooting interval
Identify the model that generated the image file based on the model information stored in the image file,
From the database in which the known continuous shooting interval and the model are registered in association with each other, obtain the known continuous shooting interval corresponding to the specified model,
The shorter one of the known continuous shooting interval or the temporary continuous shooting interval acquired from the database is determined as the continuous shooting interval,
3. The continuous shot image reproduction method according to claim 1, wherein the known continuous shooting interval corresponding to the specified model is updated to the determined continuous shooting interval. In the step of determining the continuous shooting interval, when the time interval indicated by the shooting date and time information of the plurality of image files is 1 second or less,
Among the plurality of image files in which the time interval indicated by the shooting date / time information is 1 second or less and the period from the first date / time of second precision indicated by the shooting date / time information to the last date / time of second precision is 3 seconds or more Determining the reciprocal number (seconds) of a plurality of the image files indicating the same date and time that is not the first date and time or the last date and time as the continuous shooting interval.
6. The continuous image reproduction method according to claim 5, wherein the known continuous shooting interval corresponding to the specified model is updated to the determined continuous shooting interval. Determination means for determining a continuous shooting interval of a plurality of image files generated by continuous shooting based on shooting date and time information stored in the image file and the number of the image files;
Reproduction means for sequentially reproducing the plurality of image files at the determined continuous shooting interval;
A continuous-shot image reproduction device comprising: Determining means for determining a continuous shooting interval of a plurality of image files generated by continuous shooting based on shooting date and time information indicating a generation date and time of the image file and the number of the image files;
Reproduction means for sequentially reproducing the plurality of image files at the determined continuous shooting interval;
A continuous shot image reproduction program characterized by causing a computer to function.

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