JP4422543B2 - Image display device and image display method - Google Patents

Description

  The present invention relates to an image display apparatus and an image display method for reproducing and displaying image data.

In recent years, many electronic cameras have an image display function for reproducing and displaying an image file recorded on a recording medium by photographing as necessary.
In such an electronic camera, an image file obtained by photographing is generally a memory card that can be attached and detached according to a hierarchy such as shown in FIG. 7, which complies with a certain format such as DCF (Design Rule for Camera File system). Or the like.

  FIG. 8 is a diagram showing an example of the data structure of the memory card in which the image file is recorded as described above. However, the memory card shown in the figure is managed by a FAT (File Allocation Tables) file system. As shown in the figure, on this memory card, as directory information, a directory area in which the information of the directory one layer below the directory or the first cluster number of the area in which the image file is recorded is recorded, An image file area in which the image file itself is recorded is provided, and a desired image file can be accessed by tracing the head cluster number in order from the root directory area. For example, in order from the root directory area, the “DCIM” directory area with the leading cluster number “3” and the “100OLYMP” directory area with the leading cluster number “10” are traced to “AAAA0001.jpg” with the leading cluster number “50”. The file can be accessed.

  However, with such a method of tracking the first cluster number in order from the root directory area, if the number of image files and directories recorded on the memory card becomes enormous, the process until the desired image file is accessed. The required time will be longer. Therefore, when reproducing an image file, it takes time to read out a desired image file, and smooth image reproduction according to an image reproduction instruction cannot be performed.

  In particular, in recent years, with the spread of electronic cameras, recording media such as removable memory cards are also becoming increasingly large-capacity, and electronic cameras can be taken easily by anyone. The number of image files recorded on one recording medium tends to increase. For these reasons, the problem relating to the time required to access the image file has become a larger problem.

On the other hand, Patent Document 1 proposes the following file management device. This apparatus divides the moving image file into a plurality of divided files and creates a divided file control file in which the reproduction order of the divided files is registered in order to perform the moving image file reverse reproduction process. When moving image file reverse reproduction is performed, data is sequentially read from the plurality of divided files based on the created divided file control file, and reverse reproduction processing is performed. As a result, smooth reverse reproduction can be performed without taking time to read the data.
JP-A-6-75833

  In this patent document 1, images to be reproduced are divided into a plurality of groups, a divided file in which the reproduction order is registered is created, and smooth reproduction is performed without taking time to read the data. It describes that the playback order of image files to be controlled is controlled. However, in the above prior art, it is necessary to divide all moving image files, which takes time. Also, control files for all of the many files that have been divided must be created, which consumes time and memory.

  In view of the above circumstances, the present invention creates an image display device capable of creating a control file in a short time and with a small amount of memory, and smoothly reproducing a large amount of image data without taking time to read the data. An object is to provide a display method.

  In order to achieve the above object, an image display device according to a first aspect of the present invention, in an image display device capable of reproducing and displaying image data, frame number designating means for designating a frame number of image data to be reproduced and displayed, A direction in which the specified frame number decreases with reference to the specified frame number and a group existing within a predetermined range in the direction in which the specified frame number increases, and the specified frame number When the frame number is updated in the increasing direction by the first playlist creating means for creating a group that exists within the predetermined range as a first playlist, and the frame number designating means, the first playlist is created. Exists in the first area having a frame number that is a predetermined number smaller than the largest frame number in the playlist, or the frame number is updated in the decreasing direction by the frame number designating means. Area discriminating means for discriminating whether or not a second frame having a frame number larger than the minimum frame number in the first reproduction list by a predetermined number, and the frame updated by the frame number designating means. When it is determined that the number exists in the first area, a group of frame numbers in which the frame number is further increased by a predetermined number from the maximum frame number is created as a second playlist, and the second playlist is created. And a second playlist creation means for creating a group of frame numbers whose frame numbers are further decreased by a predetermined number from the minimum frame number as a second playlist when it is determined that the frame is present in the area. It is a configuration.

  According to this configuration, in the image display apparatus capable of reproducing and displaying image data, the frame number of the image data to be reproduced and displayed is designated by the frame number designation means, and the designated frame is designated by the first reproduction list creating means. Based on the number, the group that exists in the predetermined range in the direction in which the specified frame number increases, and the specified frame number in the predetermined range in the direction in which the specified frame number decreases, based on the specified frame number The existing group is created as the first playlist, and when the frame number is updated in the increasing direction by the frame number designating unit by the area discriminating unit, the maximum frame number in the first playlist is created. When the frame number is updated in the decreasing direction by the frame number designating means. It is determined whether a frame number that is a predetermined number larger than the minimum frame number in one reproduction list exists in the second area, and the frame number updated by the frame number designating unit is determined by the second reproduction list creating unit. When it is determined that the frame number exists in the first area, a group of frame numbers in which the frame number is further increased by a predetermined number from the maximum frame number is created as a second playlist, When it is determined that the frame number exists, a group of frame numbers in which the frame number further decreases by a predetermined number from the minimum frame number is created as the second reproduction list.

  In the image display apparatus according to the second aspect of the present invention, in the first aspect, the second playlist is created on the assumption that the frame number updated by the frame number designating means exists in the first area. If the frame number is incremented by a predetermined number from the minimum frame number, the second playlist is created assuming that the frame number updated by the frame number designating means is present in the second area. In such a case, a group of frame numbers that decrease by a predetermined number from the maximum frame number is deleted.

The image display device according to a third aspect of the present invention has a configuration in which, in the second aspect, the number of deleted frames is the same as the number of frames registered in the second reproduction list. is there.
An image display apparatus according to a fourth aspect of the present invention is configured in the first aspect, wherein the frame number designation means designates a frame number of image data to be reproduced and displayed first in the reproduction mode.

In the image display device according to a fifth aspect of the present invention, in the first aspect, the frame number designation means is reproduced and displayed last in the reproduction mode set before the latest reproduction mode is set. In this configuration, the frame number of the selected image data is designated.
The image display device according to a sixth aspect of the present invention is the image display device according to the first aspect, wherein the frame number designation means is provided even when the first reproduction list or the second reproduction list is created. The frame number update signal input is received.

  Further, the present invention is not limited to the image display device, and can be configured as an image display method.

  According to the present invention, when playback of a predetermined number of playback frames is finished, it is predicted that playback will continue and a new playlist is created in advance. Even when there are no frames to be played back in the list, it is possible to smoothly play back images by referring to a new playback list. In addition, since a reproduction list relating to an appropriate amount of image frames is created as necessary, the reproduction list can be created in a short time and with a small amount of memory.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a main configuration of an electronic camera to which an image display apparatus or an image display method according to an embodiment of the present invention is applied.
Note that this electronic camera is based on DCF, and here, an image file is recorded on a recording medium in accordance with the hierarchy shown in FIG. Further, a FAT file system is adopted as the file system.

  In the electronic camera shown in FIG. 1, the subject image formed by the photographing lens system 1 is photoelectrically converted into an electric signal by the image pickup device 2 and further subjected to predetermined image pickup processing by the image pickup circuit 3. A / D conversion is performed by the unit 4. The image data obtained in this way is subjected to predetermined image processing by a system controller (hereinafter simply referred to as “syscon”) 5, and then subjected to predetermined compression processing by an image processing unit 6. It is recorded as an image file in the removable memory 9 attached to the card slot 8 via F7.

  On the other hand, the image file recorded in the removable memory 9 attached to the card slot 8 is read via the I / F 7 in accordance with an image reproduction instruction and subjected to a predetermined expansion process by the image processing unit 6. Thereafter, predetermined image processing is performed by the syscon 5 and stored in the VRAM 10. Then, it is read by the LCD driver 11 and the image is displayed on the built-in LCD 12.

  The DRAM 13 which is a built-in RAM is further used by the system controller 5 for temporarily storing image data A / D converted by the A / D unit 4 and for temporarily storing image data being processed by the image processing unit 6. A memory used as a work area for executing the control process, and a later-described reproduction list created by the system controller 5 is also stored in the memory.

The syscon 5 includes a CPU (Central Processing Unit), and controls the overall operation of the electronic camera by reading and executing a camera program stored in the built-in ROM 14. Create / add / delete lists.
The operation unit 15 includes a release button for instructing shooting, a cross button for instructing frame advance of a reproduced image and moving a displayed cursor, an OK button for selecting an item, and power ON / OFF. It is composed of various buttons and switches operated by the user, such as a power button for performing, a mode switching switch for switching various modes such as a shooting mode and a playback mode, and receives various instructions from the user and notifies the syscon 5 Is. For example, when the left button or the right button of the cross button is pressed, a frame number update signal is input to the system controller 5.

Next, the reproduction list stored in the DRAM 13 will be described.
The playlist is created, added, or deleted by the system controller 5, and for each of a specific number of image files (image data) recorded in the removable memory 9, the image file is stored in the removable memory 9 in the order of storage. This shows the correspondence between a certain frame number, the file name of the image file, and the leading cluster number of the area on the removable memory 9 where the image file is recorded.

  When the image is reproduced, the start cluster number of the image file of the frame number to be reproduced is obtained by referring to this reproduction list, and the area starting from the start cluster number on the removable memory 9 is directly accessed to obtain the image file. By reading out and reproducing the image, it is possible to shorten the time required to access the image file and to perform smooth reproduction according to the reproduction instruction.

FIG. 2 is a diagram showing an example of a reproduction list stored in the DRAM 13.
As shown in the figure, the reproduction list 16 shows the correspondence between the frame number, the file name, and the head cluster number for each of a specific number of image files recorded in the removable memory 9. For example, when playing back the image file of frame number 1, first, the corresponding cluster number “50” is obtained by referring to this play list 16, and the area of cluster number 50 on the removable memory 9 is directly accessed. Then, the “AAAAA0001.JPG” file is read and the image is reproduced.

  In the following, the corresponding frame number, file name, and leading cluster number are also referred to as image information of the frame number. For example, in the example of FIG. 2, the corresponding frame number 1, the file name “AAAA0001.jpg”, and the head cluster number 50 are also referred to as image information of frame number 1.

In this embodiment, the frame number corresponds to the playback order.
Next, as an operation of the electronic camera, an operation performed when the playback mode is set will be described.
3 (a), 4 (a), 4 (b), and 5 are flowcharts according to an example of this operation, and FIG. 3 (b) is an image diagram of a playlist created / added / deleted in this operation. FIG. 3C is a diagram showing an example of a folder selection screen displayed during the process of this operation.

First, the playlists A, B, and C used in this operation will be described with reference to FIG.
As shown in FIG. 6B, in this operation, the reproduction list A is the total number of image files (image data) recorded in the removable memory 9, where N ≧ 501, and N When a frame number is assigned to an image file, this is a reproduction list having image information for 100 frames backward from frame number 1, and the reproduction list B is 100 frames forward from frame number N at that time. A reproduction list having image information. The reproduction list C is a reproduction list having frame numbers other than the frame numbers included in the reproduction list A and the reproduction list B at that time, and having image information for a predetermined number of continuous frames. In this operation, the front indicates the direction in which the frame number decreases, and the rear indicates the direction in which the frame number increases.

Subsequently, this operation will be described in detail with reference to FIGS. 3A, 3C, 4A, 4B, and 5. FIG.
When this operation starts, as shown in FIG. 3 (a), first, the reproduction list A having image information for 100 frames backward from frame number 1 and image information for 100 frames forward from frame number N are displayed. The reproduction list B is created (S1), and both reproduction lists are stored in the internal RAM 13.

Subsequently, a folder selection screen is displayed on the built-in LCD (S2), and the process waits until a desired folder is selected by the user (S3).
An example of the folder selection screen is shown in FIG. As shown in FIG. 4C, the folder recorded on the removable memory 9 is displayed on the built-in LCD 12 on the folder selection screen. Then, on this selection screen, the user can move the cursor 17 up and down by depressing the up / down button of the cross key to designate a desired folder, and the cursor 17 designates by depressing the OK button. The folder to be selected can be selected (determined). For example, in this example, when the OK button is pressed, the folder “100OLYMP” is selected.

  Thus, when a desired folder is selected by the user, the frame number of the image file belonging to the selected folder and having the playback order first is set to X ( S4). Thereby, the frame number of the image file to be reproduced and displayed is set. Note that the frame number of the image file belonging to the folder and having the first playback order is, for example, the frame number of the image file stored last in the folder.

  Subsequently, it is determined whether or not the frame number X is included in the reproduction list A or the reproduction list B (S5). Here, if the determination result is Yes, the process proceeds to S7. If the determination result is No, then the frame number X, the 150 frames preceding the frame number X, and the rear following the frame number X are continued. The reproduction list C having image information for 150 frames is created (S6), stored in the built-in RAM 13, and the process proceeds to S7.

  However, in S6, if a part of 150 frames ahead of frame number X overlaps with playlist A, it will be duplicated from 150 frames instead of 150 frames ahead of frame number X. The remaining frames are calculated by subtracting the frames to be played. Alternatively, when a part of the 150 frames ahead of the frame number X overlaps with the playlist A and the number of frames ahead of the frame number X is less than 150, it continues to the frame number X. Instead of the front 150 frames, the remaining frames are obtained by subtracting the overlapping frames from all the frames preceding the frame number X. Similarly, when a part of the back 150 frames continuing to frame number X overlaps with the playlist B, instead of the back 150 frames continuing to frame number X, the frames overlapping from the 150 frames are overlapped. The remaining frame is deducted. Alternatively, if a part of the back 150 frames that follow the frame number X overlaps with the playlist B and the number of back frames that follow the frame number X is less than 150, it continues to the frame number X. Instead of the back 150 frames, the remaining frames are obtained by subtracting the overlapping frames from all the frames behind the frame number X.

Subsequently, in S7, the cluster number of the frame number X is acquired from the reproduction list stored in the built-in RAM 13, the corresponding image file is read from the removable memory 9, and the image is displayed on the built-in LCD 12 (S8).
Subsequently, it is determined whether or not the frame number X is included in the reproduction list A (S9). If the determination result is Yes, the process proceeds to S10, and if the determination result is No, the process proceeds to S14.

  In the determination of S9, if the determination result is Yes, then it is determined whether or not the frame number X is included in the 50 frames forward from the last frame number in the playlist A. (S10), if the determination result is Yes, the process proceeds to S11, and if the determination result is No, the process proceeds to S35.

  In the determination at S10, if the determination result is Yes, then whether or not the last frame number in the reproduction list A and the foremost frame number in the reproduction list C are adjacent (continuous). (S11). If the determination result is Yes, the process proceeds to S35, and if the determination result is No, the process proceeds to S12. In the determination of S11, if the playlist C does not exist at the time of the determination, the determination result of S11 is No.

In the determination at S11, if the determination result is No, all elements (image information) included in the reproduction list C are deleted (S12), and the process proceeds to S13. However, in S12, if the reproduction list C does not exist at this time, the process proceeds to S13 without doing anything.
In subsequent S13, image information for the last 100 frames following the last frame number in the reproduction list A is added to the reproduction list C, and the process proceeds to S35. However, in S13, if the reproduction list C does not exist at this time, a reproduction list C having image information for 100 frames is created and stored in the built-in RAM 13.

On the other hand, in the determination of S9, if the determination result is No, it is subsequently determined whether or not the frame number X is included in the reproduction list B (S14). If the determination result is Yes, The process proceeds to S15, and in the case of No, the process proceeds to S19.
If the determination result in S14 is Yes, then it is determined whether or not the frame number X is included in the 50 frames backward from the foremost frame number in the playlist B. (S15), if the determination result is Yes, the process proceeds to S16, and if the determination result is No, the process proceeds to S35.

  In the determination of S15, if the determination result is Yes, then, whether or not the foremost frame number in the reproduction list B and the last frame number in the reproduction list C are adjacent (continuous). (S16), if the determination result is Yes, the process proceeds to S35, and if the determination result is No, the process proceeds to S17. In the determination of S16, if the playlist C does not exist at the time of the determination, the determination result of S16 is No.

In the determination at S16, if the determination result is No, all elements (image information) included in the reproduction list C are deleted (S17), and the process proceeds to S18. However, in S17, if the reproduction list C does not exist at this time, the process proceeds to S18 without doing anything.
In subsequent S18, image information for the 100 frames ahead of the foremost frame number in the playlist B is added to the playlist C, and the process proceeds to S35. However, in S18, if the reproduction list C does not exist at this time, the reproduction list C having image information for 100 frames is created and stored in the built-in RAM 13.

  On the other hand, in the determination of S14, if the determination result is No, then whether or not the frame number X is included in 50 frames backward from the foremost frame number in the playlist C is determined. If the determination result is Yes, the process proceeds to S20 in FIG. 4A, and if the determination result is No, the process proceeds to S27.

  In the determination of S19, when the determination result is Yes, as shown in FIG. 4 (a), the last frame number in the reproduction list A and the foremost frame number in the reproduction list C are then continued. Are adjacent (continuous) or not (S20). If the determination result is Yes, the process proceeds to S35 in FIG. 3A, and if No, the process proceeds to S21.

  In the determination of S20, if the determination result is No, then the total number of frame numbers existing between the last frame number in the reproduction list A and the foremost frame number in the reproduction list C. Is less than 100 (S21). If the determination result is Yes, the total number of frame numbers in between is set to n (S22), and if the determination result is No, 100 is set to n (S23). Subsequently, image information for the previous n frames consecutive to the foremost frame number in the reproduction list C is added to the reproduction list C (S24).

  Subsequently, it is determined whether or not the total number of frame numbers included in the play list C is greater than 300 (S25). If the determination result is Yes, the last frame number in the play list C is forwarded. The image information for n frames is deleted from the reproduction list C (S26). If the determination result is No, S26 is skipped and the process proceeds to S35 in FIG.

  On the other hand, in the determination of S19 in FIG. 3 (a), if the determination result is No, then the frame number X is included in 50 frames forward from the last frame number in the playlist C. It is determined whether or not it is included (S27). If the determination result is Yes, the process proceeds to S28 in FIG. 4B, and if it is No, the process proceeds to S35.

  In the determination of S27, when the determination result is Yes, as shown in FIG. 4B, the foremost frame number in the reproduction list B and the last frame number in the reproduction list C are subsequently continued. Are adjacent (continuous) or not (S28). If the determination result is Yes, the process proceeds to S35 in FIG. 3A, and if No, the process proceeds to S29.

  In the determination of S29, if the determination result is No, then the total number of frame numbers existing between the foremost frame number in the reproduction list B and the last frame number in the reproduction list C. Is determined to be smaller than 100 (S29). If the determination result is Yes, the total number of frame numbers in between is set to n (S30). If the determination result is No, 100 is set to n (S31). Subsequently, image information for the subsequent n frames following the last frame number in the reproduction list C is added to the reproduction list C (S32).

  Subsequently, it is determined whether or not the total number of frame numbers included in the play list C is larger than 300 (S33). If the determination result is Yes, the process proceeds backward from the foremost frame number in the play list C. The image information for n frames is deleted from the reproduction list C (S34). If the determination result is No, S34 is skipped and the process proceeds to S35 in FIG.

  In FIG. 3 (a), in S35, an instruction input from the user is awaited. Here, when pressing of the left button of the cross button is detected, X-1 is set to X (S36), and then it is determined whether X is smaller than 1 (S37), and the determination result is Yes. In the case of N, N is set to X (S38), and in the case of No, S38 is skipped and the process returns to S7.

  On the other hand, when it is detected in S35 that the right button of the cross button is pressed, X + 1 is set to X (S39), and then it is determined whether or not X is greater than N (S40). In this case, 1 is set to X (S41), and in the case of No, S41 is skipped and the process returns to S7.

  In this operation, in S13, S18, S24, and S32 described above, it is possible to detect the pressing of the left button and the right button of the cross button even during the processing, and the pressing is detected. When this happens, the corresponding image can be displayed.

FIG. 5 is a diagram showing a flowchart relating to the above-described processes of S13, S18, S24, and S32.
In the figure, if the image information to be added to the play list C is the image information of frame numbers a to b (b−a + 1 frame), first, a (the first frame number to be added to the play list C) is set to i. Then, the image information of frame number i is added to the reproduction list C (S43).

Subsequently, it is determined whether i = b (the last frame number to be added to the reproduction list C) (S44). If the determination result is Yes, this flow ends. If it is No, the flow ends. i + 1 is set to i (S45).
Subsequently, the presence / absence of an instruction input from the user is detected (S46), and if no instruction input is detected, the process returns to S43.

  On the other hand, when it is detected in S46 that the left button of the cross button is pressed, the same processing as in S36 to 38 described above is performed (S47 to 49), and the process proceeds to S53, and the press of the right button of the cross button is detected. If this happens, the same processing as in S39 to S41 described above is performed (S50 to 52), and the process proceeds to S53.

  In subsequent S53, it is determined whether or not the frame number X is included in any of the reproduction lists A, B, and C. If the determination result is Yes, the first cluster number of the frame number X from the reproduction list is determined. Acquired (S54), the corresponding image file is read from the removable memory 9, and the image is displayed on the built-in LCD 12 (S55).

On the other hand, if the determination result in S53 is No, the image information of frame numbers i to b is added to the reproduction list C (S56), and this flow ends. That is, the user input is not accepted until the addition to the playlist C is completed.
By such processing, when the left and right buttons of the cross button are pressed during the process of adding image information to the playlist C and the frame number X at this time is included in the playlists A, B, and C, the frames are displayed. The image with the number X is reproduced.

  Here, the processing when the left and right buttons are pressed during the process of adding image information to the playlist C has been described, but the creation of the playlist C performed when the playlist C does not exist in S13 and S18. The same processing is performed when the left and right buttons are pressed during processing. Further, in the above-described S6 (see FIG. 3 (a)), the same processing can be performed when the left and right buttons are pressed during the process of creating the reproduction list C.

  As described above, according to this embodiment, when playback of a predetermined number of playback frames is completed, it is predicted that playback will continue and a new playlist is created in advance. Even if there are no more playback schedule frames in the playlist being used, it is possible to smoothly play back images by referring to the new playlist. In addition, since a reproduction list relating to an appropriate amount of image frames is created as necessary, the reproduction list can be created in a short time and with a small amount of memory.

Further, it is possible to accept input from the user even during the process of adding image information to the reproduction list.
In this embodiment, the frame number of the image file that is played first when the playback mode is set is the frame number of the image file that belongs to the folder selected by the user and the playback order is the first. Although it is a number (see S4), for example, this can also be used as the frame number of the image file that was last reproduced and displayed in the previous reproduction mode. That is, it is possible to use the frame number of the image file last reproduced and displayed in the reproduction mode set before the latest reproduction mode is set.

  In this embodiment, the reproduction lists A, B, and C are stored in the built-in RAM 13 different from the removable memory 9 in which the image file is recorded, but the image file is recorded. It is also possible to record in the removable memory 9. In this case, at least the playlists A, B, and C are recorded and held in the removable memory 9 while the electronic camera is being activated (powered on).

In addition, the electronic camera is provided with a plurality of card slots so that a plurality of detachable memories can be mounted at the same time, and playlists A, B, and C relating to image files recorded in one detachable memory are transferred to the other detachable memory. It is also possible to record in a memory.
In this embodiment, the image display apparatus or the image display method according to the present invention is applied to an electronic camera. However, other than that, an image file recorded on a recording medium can be reproduced, for example, PDA, PHS, mobile phone, etc. Of course, the present invention can be applied to an apparatus such as a container, and may be applied to an image display apparatus that reproduces an image file recorded on a recording medium.

  The present invention has been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and changes may be made without departing from the scope of the present invention.

1 is a diagram illustrating a main configuration of an electronic camera according to Embodiment 1. FIG. It is a figure which shows an example of the reproduction | regeneration list | wrist memorize | stored in DRAM. (a) is a diagram showing a flowchart according to an example of the operation of the electronic camera, (b) is an image diagram of a playlist created / added / deleted by this operation, and (c) is a diagram showing an example of a folder selection screen. . (a), (b) is a figure which shows the flowchart which concerns on an example of operation | movement of an electronic camera. It is a figure which shows the flowchart which concerns on an example of operation | movement of an electronic camera. It is a figure which shows an example when an image file is recorded on the recording medium according to the hierarchy based on a fixed format. It is a figure which shows an example of the data structure of the memory card with which the image file was recorded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shooting lens system 2 Image sensor 3 Imaging circuit 4 A / D part 5 Syscon 6 Image processing part 7 I / F
8 Card slot 9 Removable memory 10 VRAM
11 LCD driver 12 Built-in LCD
13 Built-in RAM (DRAM)
14 Internal ROM
15 Operation section 16 Playlist 17 Cursor

Claims (7)

In an image display device capable of reproducing and displaying image data,
Frame number specifying means for specifying the frame number of the image data to be reproduced and displayed;
A direction in which the specified frame number decreases with reference to the specified frame number and a group existing within a predetermined range in the direction in which the specified frame number increases, and the specified frame number A first playlist creating means for creating a group existing within a predetermined range of the first playlist as a first playlist;
When the frame number is updated in the increasing direction by the frame number specifying means, the frame number exists in a first area having a frame number that is a predetermined number smaller than the maximum frame number in the first reproduction list, or An area determination for determining whether or not the frame number is updated in a decreasing direction by the frame number designating means if the frame number exists within a second area having a frame number larger than the minimum frame number in the first reproduction list by a predetermined number. Means,
When it is determined that the frame number updated by the frame number designating means exists in the first area, a group of frame numbers in which the frame number is further increased by a predetermined number from the maximum frame number is set to a second number. A second playlist that is created as a playlist, and when it is determined that it exists in the second area, a group of frame numbers in which the frame number is further reduced by a predetermined number from the minimum frame number is created as a second playlist. Playlist creation means,
An image display device comprising: When the second play list is created on the assumption that the frame number updated by the frame number designating means exists in the first area, the group of frame numbers increasing by a predetermined number from the minimum frame number is deleted, When the second play list is created on the assumption that the frame number updated by the frame number designating means exists in the second area, a group of frame numbers that are reduced by a predetermined number from the maximum frame number is deleted. ,
The image display device according to claim 1. The number of deleted frames is the same as the number of frames registered in the second playlist.
The image display device according to claim 2. The frame number designation means designates a frame number of image data to be reproduced and displayed first in the reproduction mode.
The image display device according to claim 1. The frame number designating unit designates the frame number of the image data displayed and reproduced last in the playback mode set before the latest playback mode is set.
The image display device according to claim 1. Even when the first playlist or the second playlist is created, the input of the frame number update signal by the frame number designating unit is accepted.
The image display device according to claim 1. In an image display method for reproducing and displaying image data,
A step of specifying a frame number of image data to be reproduced and displayed;
A direction in which the specified frame number decreases with reference to the specified frame number and a group existing within a predetermined range in the direction in which the specified frame number increases, and the specified frame number Creating a group that exists within a predetermined range as a first playlist;
When the frame number is updated in the increasing direction by the designation, it exists in the first area having a frame number smaller than the maximum frame number in the first playlist by a predetermined number, or by the designation Determining whether a frame number is updated in a decreasing direction, the frame number is within a second area having a frame number that is a predetermined number larger than the minimum frame number in the first playlist;
When it is determined that the frame number updated by the designation exists in the first area, a group of frame numbers in which the frame number is further increased by a predetermined number from the maximum frame number is set as the second playlist. Creating a group of frame numbers in which the frame number is further reduced by a predetermined number from the minimum frame number when it is determined that the frame is present in the second area, as a second playlist;
An image display method characterized by comprising:

Images