US20110064376A1 - Apparatus, method, and program for recording image - Google Patents

Abstract

An image recording apparatus includes an image capturing unit configured to capture an image of a subject, a recording unit configured to record one of still image data and video image data captured by the image capturing unit on a storage medium in the form of an image file, a generating unit configured to generate a management file used for managing the image file recorded on the storage medium, and a registering unit configured to register an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.

Description

CROSS REFERENCES TO RELATED APPLICATIONS
• This application is a continuation of U.S. application Ser. No. 11/637,685, filed on Dec. 12, 2006, which claims priority from Japanese Patent Application JP 2005-380371 filed in the Japanese Patent Office on Dec. 28, 2005, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
• 1. Field of the Invention
• The present invention relates to an apparatus, a method, and a program for recording an image and, in particular, to a method, and a program for recording an image suitable for managing images captured by, for example, a video camera.
• 2. Description of the Related Art
• Existing video cameras employ a tape storage medium and successively record captured images on the tape storage medium. Accordingly, a user stores the images on a tape medium. To view the images stored on the tape storage medium, the user needs to search for a desired image by playing back the images in the order in which they were captured.
• In recent years, video cameras that record images on, for example, a storage medium that allows random access (such as a hard disk) have been introduced into market. In addition, to manage images recorded in such video cameras, a technology is proposed in which the images are divided into small groups based on a minimum unit of data required for accessing the data (refer to, for example, Japanese Unexamined Patent Application Publication No. 2000-270347).
• According to such a management method, the maintenance of images stored on the tape storage medium is not needed, and therefore, the search for desired scene in the images by playing back the images in the tape storage medium in the order in which they were captured is not needed.
SUMMARY OF THE INVENTION
• However, since the users are not familiar with the grouping of the images in such a management method, the users feel confused or frustrated when editing the captured data.
• Accordingly, the present invention provides an apparatus, a method, and a program capable of managing files recorded on the storage medium in a variety of aspects in a user-friendly manner.
• According to an embodiment of the present invention, an image recording apparatus includes image capturing means for capturing an image of a subject, recording means for recording one of still image data and video image data captured by the image capturing means on a storage medium in the form of an image file, generating means for generating a management file used for managing the image file recorded on the storage medium, and registering means for registering an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.
• Accordingly, this image recording apparatus can automatically group image files on a capture date basis, which usually corresponds to a personal event, for each type of image file. Consequently, this image recording apparatus can manage the image files more effectively than image recording apparatuses that simply manage the image files on a scene-to-scene basis.
• According to another embodiment of the present invention, a method for recording an image includes the steps of (a) capturing an image of a subject, (b) recording one of still image data and video image data captured in step (a) on a storage medium in the form of an image file, (c) generating a management file used for managing the image file recorded on the storage medium, and (d) registering an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.
• Accordingly, the method according to the embodiment can automatically group the image files on a capture date basis for each type of file. In general, personal events occur on the basis of a date. Therefore, the image files can be effectively managed compared with simply recording on a scene-to-scene basis.
• According to still another embodiment of the present invention, a program, executed by a computer, includes program code for performing the steps of (a) controlling image capturing means to capture an image of a subject, (b) controlling recording means to record one of still image data and video image data captured by the image capturing means on a storage medium in the form of an image file, (c) generating a management file used for managing the image file recorded on the storage medium, and (d) registering an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.
• Accordingly, the program according to the embodiment can automatically group the image files on a capture date basis for each type of file. In general, personal events occur on the basis of a date. Therefore, the image files can be effectively managed compared with simply recording on a scene-to-scene basis.
• According to the embodiments of the present invention, the identifiers of image files recorded on a storage medium are registered in a management file on a capture date basis in the order of capture time. Consequently, the image files can be automatically grouped on a capture date basis for each type of file. In general, personal events occur on the basis of a date. Therefore, the image files can be effectively managed compared with simply recording on a scene-to-scene basis. As a result, an apparatus, a method, and a program for recording an image can be achieved that are capable of managing files recorded on the storage medium in a variety of aspects in a user-friendly manner.
BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a block diagram of a video camera according to an embodiment of the present invention;
• FIG. 2 is a schematic illustration of the structure of an image management file;
• FIG. 3 is a schematic illustration of the recording physical structure of the image management file;
• FIG. 4 illustrates an exemplary selection screen;
• FIG. 5 is a flow chart of the entry processing of a playlist on a capture date basis;
• FIGS. 6A and 6B are diagrams illustrating displayed images and a process for registering a file in the playlist;
• FIG. 7 illustrates an exemplary edit menu screen;
• FIG. 8 illustrates an exemplary date selection screen;
• FIG. 9 illustrates an exemplary confirmation screen;
• FIG. 10 is a diagram illustrating a playlist screen; and
• FIG. 11 is a diagram illustrating an edit operation of the playlist.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
• Embodiments of the present invention are described below with reference to the accompanying drawings.
(1) Overall Configuration of Video Recording Apparatus according to the Present Embodiment
• FIG. 1 illustrates the overall structure of avideo camera1 according to the present embodiment. Thevideo camera1 includes acontrol unit2 for performing overall control of thevideo camera1. Thevideo camera1 further includes anoperation unit3, animage capturing unit4, a recording/playback unit5, adisplay unit6, and aclock unit7, each being connected to thecontrol unit2.
• Thecontrol unit2 is a computer including a central processing unit (CPU), a read only memory (ROM) storing a variety of programs, and a random access memory (RAM) serving as a work memory of the CPU. A variety of commands COM corresponding to user operations is provided to thecontrol unit2.
• Thecontrol unit2 identifies the user operation on the basis of the provided command COM and, subsequently, performs an operation on the basis of the identified user operation and a program corresponding to the identified user operation.
(1-1) Image Capturing Mode
• More specifically, upon detecting a user operation to start capturing video, thecontrol unit2 controls theimage capturing unit4 and the recording/playback unit5 to change the operation mode of thevideo camera1 to a video capturing mode until the video capturing operation is completed.
• In this case, theimage capturing unit4 captures the image of a subject at a predetermined interval from the time thecontrol unit2 detects the operation to start capturing video to the time the video capturing operation is completed so as to obtain image data items DM1 to DMn (where n is an integer) and sequentially delivers the image data items DM1 to DMn to thecontrol unit2.
• The recording/playback unit5 encodes the image data items DM1 to DMn sequentially delivered from theimage capturing unit4 via thecontrol unit2 in accordance with a predetermined encoding method, such as the Moving Picture Experts Group (MPEG) standard. Thereafter, the recording/playback unit5 records video files DMFx (x=1, 2, 3, . . . m, where m is an integer), which are encoded image data items obtained through the encoding operation, on a storage medium SM mounted at a predetermined location of thevideo camera1.
• In contrast, upon detecting the user operation to start capturing a still image, thecontrol unit2 controls theimage capturing unit4 and the recording/playback unit5 to change the operation mode of thevideo camera1 to a still image capturing mode.
• In this case, theimage capturing unit4 captures the image of a subject at the time when a user operation to capture a still image is carried out and, subsequently, delivers image data DJ obtained through the capture operation to thecontrol unit2. The recording/playback unit5 encodes the image data DJ delivered from theimage capturing unit4 via thecontrol unit2 in accordance with a predetermined encoding method, such as the Joint Photographic Experts Group (JPEG) standard. Thereafter, the recording/playback unit5 records the encoded image data on a storage medium SM in the form of a still image file DJFy (y=1, 2, 3, . . . l, where l is an integer).
• In this way, thecontrol unit2 can record an image captured at the time performance of the operation to capture a still image is instructed by a user or record an image captured during the period from the time performance of operation to start capturing video is instructed by a user to the time performance of operation to complete capturing video (hereinafter, the image is referred to as a “scene”) is instructed by a user onto the storage medium SM in the form of an individual file.
• Here, each of the files recorded on the storage medium SM includes date and time information generated by the built-in clock of thecontrol unit2 at the time of image capture. Thus, even when the video files DMFx or still image files DJFy recorded on the same day are present, thecontrol unit2 can identify the order in which the images were captured by referencing the capture times in the date and time information included in the files.
(1-2) Playback Mode
• Upon detecting instruction of the operation to play back a video file or a still image file, thecontrol unit2 controls theimage capturing unit4 and the recording/playback unit5 to change the operation mode of thevideo camera1 to a playback mode.
• In this case, the recording/playback unit5 reads out a file IM specified by the command COM received from theoperation unit3 from among the video files DMFx (x=1−m) or the still image files DJFy (y=1−1) recorded on the storage medium SM.
• Subsequently, the recording/playback unit5 carries out the decoding operation corresponding to the compression encoding method on the readout file IM and delivers the decoded image data DR to thecontrol unit2.
• Thedisplay unit6 digital-to-analog (D/A) converts the image data DR sequentially delivered from the recording/playback unit5 via thecontrol unit2 so as to generate image signals. Thedisplay unit6 then displays images on a display screen on the basis of the generated image signals.
• Thus, thecontrol unit2 can play back the images of the video file or the image of the still image file determined depending on the user operation.
(2) Date Management Function
• In addition to the above-described configuration, thevideo camera1 has a function of managing images of the video files DMFx and the still image files DJFy on the basis of capture date. In practice, the video files DMFx and the still image files DJFy in thevideo camera1 are managed on a capture date basis using an image management file.
(2-1) Structure of Image Management File
• As shown inFIG. 2, the image management file has a layered structure known as a tree structure, which has a root directory called an “index root”. The index root is the highest layer. As the lower layers, this tree structure has a folder called an “original root folder” (hereinafter simply referred to as an “original folder”) and a folder called a “favorite root folder” (hereinafter simply referred to as a “favorite folder”).
• These root folder, original folder, and favorite folder are created by thecontrol unit2 when no data are stored on the storage medium SM, for example, when the storage medium SM is formatted or the storage medium SM without any data thereon is mounted at a predetermined mounting location.
• A folder having a folder title in a date format (hereinafter referred to as a “date folder”) is stored in the original folder. Storing of the date folder in the original folder is referred to as an “entry”. Folders that each store information about the files recorded on the storage medium SM on the same date are entered into the date folder in the order of oldest to newest for the scene. Hereinafter, this folder is referred to as a “file information folder”.
• More specifically, for the video files DMFx, the file information folder includes path information to a thumbnail image that is a reduced image of a representative image among a plurality of images of the video files DMFx (see an arrow from the property file to the thumbnail file shown inFIG. 3), path information to the video file DMFx (i.e., information for accessing a video file entity), and path information to attribute information about the video file DMFx (not shown). In contrast, for the still image files DJFy, the file information folder includes path information to a thumbnail image of the still image file DJFy, path information to the still image files DJFy, and path information to attribute information about the still image file DJFy (not shown). Note that the path information is only an example of information for accessing a variety of the above-described information. The files and the information may be identified using an identifier, such as a file number or a file name.
• In an example shown inFIG. 2, each of reference symbols “A”, “B”, and “C” denotes a thumbnail image. Each of the folder titles “Food”, “Food 2”, and “My Cat” denotes the file identifier. It should be noted that the user can change these folder titles through an edit operation.
• In this way, the information (file information) about images captured for a scene is sequentially entered into the original folder on the basis of capture date in the order of oldest to newest.
• In thevideo camera1, the “date” is used only for grouping the file information and the file information is entered in the order in which images are captured. Accordingly, even when the built-in clock of thevideo camera1 gains or loses time, a problem that affects the management does not occur.
• In contrast, the favorite folder includes two types of folder selected from among one or more file information folders in the lower layer of the date folder: a folder (hereinafter referred to as a “video playlist folder”) that stores information about the video files DMFx selected to be continuously played back and a folder (hereinafter referred to as a “still image playlist folder”) that stores information about the still image files DJFy selected to be continuously played back. Like the root folder, these folders are generated by thecontrol unit2 when no data are recorded on the storage medium SM.
• Link information to the file information folder corresponding to the file selected to be continuously played back is sequentially entered into one of these folders in the selected order.
• In the example shown inFIG. 2, the link information to the file information folder “My Cat” corresponding to the file stored in the folder “2005/4/5” and the link information to the file information folder “Food”, which is one of the file information folders “Food” and “Food 2” corresponding to the file stored in the folder “2005/4/1”, are entered in the selected order (i.e., “My Cat” first and then “Food”). Additionally, only link information to the file information folder “Food 2”, which is one of the file information folders “Food” and “Food 2” corresponding to the file stored in the folder “2005/4/1”, is entered in the still image playlist folder.
• Accordingly, in this example, when the images in the video playlist folder are played back, the image groups of the video files DMFx corresponding to “My Cat” and “Food” are sequentially played back (i.e., “My Cat” first and then “Food”). In contrast, when the image in the still image playlist folder is played back, the images associated with the still image files DJFy corresponding to “Food 2” are played back.
• As noted above, only the link information to files selected by the user as files to be sequentially played back from among the link information to files, each corresponding to one or more scenes grouped on the basis of date, are entered into the playback folder in the order of selection (i.e., in the order of entry) for each type.
• When physically recorded on the storage medium SM, the actual file structure of the image management file is shown inFIG. 3. That is, the image management file includes a property file, a thumbnail file, and a meta data file. The reference relationship among registered entries in the property file is schematically shown inFIG. 2.
• In this property file, an entry “#4” is related to a video playlist. In this embodiment, the identifiers of theentries #21 and #24 for video files are stored in this entry. An entry “#5” is related to a still image playlist. In this embodiment, the identifier of the still imagefile entry #22 is stored in this entry. In the entries for the video file and the still image file, path information used for accessing the corresponding thumbnail image (e.g., “A”, “B”, or “C”) in the thumbnail picture file and path information used for accessing the corresponding meta data (e.g., “Food” or “My Cat”) in the meta data file are stored. Additionally, an entry “#20” stores the identifiers of the entries for a video file and a still image file captured on “2005/4/1”. Here, the videofile entry #21 and the still imagefile entry #22 are indicated by the identifiers. An entry “#23” stores identifiers of an entry for a video file and a still image file captured on “2005/4/5”. Here, the videofile entry #24 is indicated by the identifier.
(2-2) Entry Processing
• The entry processing for the above-described image management file is performed by thecontrol unit2. This entry processing performed by the control unit2 (seeFIG. 1) is described below for the date folder, the file information folder, and the playlist folder.
(2-2-1) Entry Processing for Date Folder and File Information Folder
• When detecting that the video capture start operation or the still image capture start operation is to be carried out, thecontrol unit2 controls theimage capturing unit4 and the recording/playback unit5. In addition, thecontrol unit2 controls theclock unit7 to acquire the date on which thecontrol unit2 detects initiation of the start operation as data DT (hereinafter referred to as “date data”).
• Here, thecontrol unit2 references the image management file stored on the storage medium SM using the recording/playback unit5. If a folder having a title name based on the date data DT is not found, thecontrol unit2 creates a folder having a title name based on the date data DT. In addition, thecontrol unit2 creates a file information folder having a title name based on a default character string. Thecontrol unit2 then enters these folders in the image management file.
• However, if a folder having a title name based on the date data DT is found, thecontrol unit2 creates only a file information folder. Thecontrol unit2 then enters this folder in the image management file.
• Note that if an image management file has not been recorded on the storage medium SM, thecontrol unit2 creates a root directory, an original folder, a favorite folder, a video playlist folder, and a still image playlist folder on the storage medium SM as an initial image management file.
• In addition, after the entry operation of the file information folder is made, if video data (i.e., image data items DM1 to DMn) are delivered from theimage capturing unit4 in response to the control of theimage capturing unit4, thecontrol unit2 reduces, for example, the first image data DM1 to a predetermined image size. This reduced image is used as a thumbnail image.
• In contrast, if still image data (i.e., image data DJ) is delivered from theimage capturing unit4, thecontrol unit2 reduces the image data DJ to a predetermined image size. This reduced image is used as a thumbnail image.
• Subsequently, thecontrol unit2 stores the reduced image data (hereinafter referred to as “thumbnail image data”) in the file information folder and also stores the file identifier of this file.
• In this way, thecontrol unit2 can automatically group the files on a capture date basis for each type of file.
(2-2-2) Entry Processing for Playlist Folder
• Upon detecting the entry operation to the playlist folder, thecontrol unit2 controls theimage capturing unit4 and the recording/playback unit5 to display a selection screen CS shown inFIG. 4 on the basis of the image management file recorded on the storage medium SM.
• More specifically, thecontrol unit2 starts entry processing of the playlist folder (step SP0 shown inFIG. 5). First, thecontrol unit2 displays menu items (i.e., “VIDEO”, “STILL IMAGE”, and “PLAYLIST”). Simultaneously, thecontrol unit2 selects the “VIDEO” menu item by default and displays a detailed video menu items in adetail display section10 used for displaying the details of the selected menu item.
• Subsequently, thecontrol unit2 displays one or more thumbnail images stored in an image-related folder in the lower layer of the date folder in animage display section11, which is located in the middle of thedetail display section10. In addition, thecontrol unit2 displays the earliest date among the dates of the corresponding date folders in adate display section12, which is provided above theimage display section11.
• Furthermore, if all of the thumbnail images cannot be displayed in theimage display section11 at the same time, thecontrol unit2 changes ascroll operation section13 used for scrolling the thumbnail images displayed in theimage display section11 from an inactive display state, which represents an unusable state, to an active display state, which represents a usable state. Simultaneously, thecontrol unit2 displays the total number of scrollable pages and the page number of the currently displayed page in apage display section14.
• For example, suppose, as shown inFIG. 6A, seventeen scenes are captured on some day (i.e., a date (1)) first, and then twelve scenes are captured on a date (2). Thereafter, five scenes are captured on a date (3). In such a case, thecontrol unit2 does not display any image at the location for the nonexistent eighteenth scene of the date (1), which is on the third page for the date (1), instead of displaying the thumbnail image of the first scene of the date (2). Thus, the space at that location is left blank. Similarly, thecontrol unit2 does not display any image at the location for the nonexistent sixth scene of the date (3), which is on the first page for the date (3), instead of displaying the thumbnail image of the first scene of the date (4) to be captured later. Thus, the space at that location is left blank.
• As noted above, by displaying the thumbnail images in the order of oldest to newest on a capture date basis via the selection screen CS, thecontrol unit2 can visually emphasize that the scenes are displayed on a capture date basis (i.e., on an event-to-event basis).
• Thus, thecontrol unit2 switches the display of thedetail display section10 between the “video” menu items and the “still image” menu items in response to the user operation on the operation unit3 (seeFIG. 1), so that the user can select the entry in the video playlist folder or in the still image playlist folder (step SP1 inFIG. 5).
• For example, upon detecting that the user has instructed setting of a playlist by operating a menu button when thedetail display section10 displays the video menu items, thecontrol unit2 determines that the entry of the video playlist folder is selected. Subsequently, as shown inFIG. 7, thecontrol unit2 displays an edit menu screen EMS including three edit menu items “Select and register image in the playlist”, “Register images in playlist on a capture date basis”, and “Register all images in playlist”, and a selection cursor CL1 for selecting one of these three edit menu items.
• Here, upon detecting that the edit menu item “Register images in playlist on a capture date basis” is selected, thecontrol unit2 determines that the video playlist folder is selected. Subsequently, as shown inFIG. 8, by displaying a screen (hereinafter referred to as a “date selection screen”) CSD including the list of the date folders entered in the lower layers of the original root folder in the order of oldest to newest in thedetail display section10 together with a selection cursor CL2 for selecting the date, thecontrol unit2 allows the user to select the date to be added to the video playlist folder (step SP2 inFIG. 5).
• Thereafter, upon detecting that the selection operation of the date has been carried out, thecontrol unit2 displays a confirmation screen CSX shown inFIG. 9 in thedetail display section10 in order to determine whether thecontrol unit2 is allowed to add the image having the selected date to the playlist. Upon detecting initiation of the operation to add the image to the playlist, thecontrol unit2 sequentially creates the entries of the link information to all the file information folders in the lower layer of the date folder having the selected date of scene in the order of oldest to newest in the video playlist folder (step SP3 inFIG. 5).
• At that time, if link information to a different file information folder has already been entered in the video playlist folder, thecontrol unit2 creates the entry of the link information to be entered next to the existing link information.
• Additionally, as shown inFIG. 10, simultaneously with this entry, thecontrol unit2 displays the detailed playlist menu items in thedetail display section10 and displays a thumbnail image corresponding to the selected date in theimage display section11 of thedetail display section10. Thereafter, the entry processing of the playlist folder is completed (step SP4 inFIG. 5).
• In the example shown inFIG. 6A, when the date (2) is selected, thecontrol unit2 enters link information to the file information folders having the date (2) in the video playlist folder in the order of earliest time of the scene first, as shown inFIG. 6B. Also, thecontrol unit2 displays the thumbnail images corresponding to the date (2) in thedetail display section10 as a playlist screen.
• In contrast, upon detecting that the edit item “Select and register image in the playlist” is selected, thecontrol unit2 prompts the user to select the date to be added to the video playlist folder via the date selection screen CSD (seeFIG. 8). Thereafter, thecontrol unit2 displays a selection cursor (not shown) for selecting a thumbnail image having the selected date in theimage display section11. Thus, the user selects individual thumbnail images in theimage display section11. Thecontrol unit2 puts entries of the link information to the file information folders corresponding to the selected thumbnail images in the video playlist folder. Simultaneously, thecontrol unit2 displays the selected thumbnail images in thedetail display section10 as a playlist screen.
• At that time, if link information to a different file information folder has already been entered in the video playlist folder, thecontrol unit2 creates the entry of the link information to be entered next to the existing link information, as in the case of “Register images in playlist on a capture date basis”.
• However, upon detecting that the edit item “Register all images in playlist” is selected, thecontrol unit2 puts entries of link information to all the file information folders in the lower layers of the one or more date folders in the video play list folder in the order of oldest to newest of the scene. Also, thecontrol unit2 displays all the thumbnail images in thedetail display section10 as a playlist screen.
• At that time, if link information to a different file information folder has already been entered in the video playlist folder, thecontrol unit2 creates the entry of the link information to be entered next to the existing link information, as in the case of “Select and register image in playlist”.
• Additionally, if thecontrol unit2 detects that the entry operation of the playlist is carried out after the “video” menu items has been changed to the “still image” menu items in thedetail display section10, thecontrol unit2 puts entries of link information to the selected file information folder in the still image playlist folder, as in the entry operation relating to the “video”.
• In this way, thecontrol unit2 can further categorize the files automatically grouped on a capture date basis into different groups in response to performance of the selection operation instructed by the user. That is, in addition to an image-to-image basis and an all-image basis, the group can be created on a capture date basis, which is suitable for remembering a personal event, for each type of file.
• Accordingly, for thevideo camera1, the user can group the files on an event-to-event basis using a date. In addition, the user can further group the files that the user frequently wants to view. Thus, the user can select and keep the files for the event that the user frequently wants to view. However, the user can also keep the other files for the event just in case the user wishes to view them.
(2-2-3) Edit Operation of Playlist Folder
• The edit operation of a playlist folder performed by thecontrol unit2 is described next. However, since the edit operation of a still image playlist folder is similar to that of a video playlist folder, only the edit operation of a video playlist folder is described here.
• Upon detecting that the edit operation of a video playlist is to be carried out, thecontrol unit2 displays menu items “video”, “still image”, and “playlist”. In addition, thecontrol unit2 displays detailed playlist menus in thedetail display section10, as shown inFIG. 11. Note that the same reference numerals are used in bothFIGS. 3 and 11 to identify the same elements.
• Subsequently, thecontrol unit2 displays one or more thumbnail images stored in a file information folder entered in the video playlist in animage display section11, which is located in the middle of thedetail display section10, in the order of earliest entry first. In addition, thecontrol unit2 displays the selection cursor CL2 for selecting one of the thumbnail images.
• For example, if the first entry of the video playlist is based on a capture date basis, thecontrol unit2 displays thumbnail images stored in the file information folder, which is entered on a capture date basis, in theimage display section11. At that time, if all of the thumbnail images cannot be displayed in theimage display section11 at the same time, thecontrol unit2 changes thescroll operation section13 to an active display state and displays the total number of scrollable pages and the page number of the currently displayed page in thepage display section14.
• For example, inFIG. 11, eleven thumbnail images indicated by the link information in the first entry of the video playlist folder are shown. As can be seen fromFIG. 11, thecontrol unit2 does not display any image in a space corresponding to the twelfth image position onpage2 in theimage display section11, instead of displaying the thumbnail image indicated by the link information in the second entry of the video playlist folder. Thus, the space at that position is left blank. In this way, thecontrol unit2 visually emphasizes that the thumbnail images are displayed on a capture date basis while displaying the thumbnail images in the order of oldest to newest.
• At that time, upon detecting that a delete operation is to be carried out, thecontrol unit2 deletes the link information to the file information folder corresponding to the thumbnail image selected by means of the selection cursor CL2 from the video playlist folder.
• In contrast, upon detecting that a change operation of the entry order is to be carried out, thecontrol unit2 prompts the user to select two thumbnail images to be exchanged by means of the selection cursor CL2. Thereafter, thecontrol unit2 changes the entry orders of the link information corresponding to the selected thumbnail images.
• Thus, thecontrol unit2 can edit the files grouped for successive playback in response to the selection operation performed by the user.
• In this way, for thevideo camera1, the user can further categorize the files grouped on a capture date basis for each personal event into different groups of files that the user frequently wants to view. Furthermore, by appropriately changing the order in which the files are played back or deleting the file, the user can view the video that matches their preference.
• Here, for example, suppose a user shoots a video at personal events such as an athletic meet and a Christmas party using thevideo camera1. In this case, the captured images (scenes) are automatically grouped on the basis of the date (the date of the athletic meet or the date of the Christmas party) in the order of oldest to newest. After the scenes are captured, the user can group the images corresponding to the scenes that contain their child as images to be successively played back and appropriately edit the images. Thus, the user can view successively played back images (i.e., video) that mainly shows their child.
(2-2-4) Transfer Process of Playlist
• The transfer process of a playlist performed by thecontrol unit2 is described next. However, since the transfer process of a still image playlist folder is similar to that of a video playlist folder, only the transfer process of a video playlist folder is described here.
• Upon detecting that the transfer operation of a video playlist is to be carried out, thecontrol unit2 references the targets indicated by the link information in all the entries of the video playlist folder so as to arrange the thumbnail images stored in the file information folders in the order of selection. Thus, thecontrol unit2 generates display data shown in theimage display section11 ofFIG. 11.
• Subsequently, thecontrol unit2 transmits the display data together with the video files DMFx corresponding to the thumbnail images of the display data to, for example, a personal computer via an interface (not shown). The display data can be used as information items of the personal event on a web page or index data when a video is recorded on a digital versatile disc (DVD).
• As noted above, thecontrol unit2 can transfer the display data used for information items of the personal event on a web page or index data when a video is recorded on a digital versatile disc (DVD) to, for example, a personal computer that edits the video on the basis of the playlist.
(3) Summary
• In the above-described configuration, thevideo camera1 records an image captured when a still image capture operation is carried out on the storage medium SM as a still image file DJFy (seeFIG. 1). In addition, thevideo camera1 records a plurality of images captured from the time when a video capture start operation is carried out to the time when a video capture end operation is carried out on the storage medium SM as a video file DMFx (seeFIG. 1).
• Here, thevideo camera1 has a function of making an entry (seeFIG. 2) of the identifier of the video file DMFx or the still image file DJFy on a capture date basis in the order of capture time each time the file is recorded on the storage medium SM.
• Accordingly, thevideo camera1 can automatically group the files on a capture date basis for each type of file. In general, personal events occur on the basis of a date. Therefore, the files can be effectively managed compared with simply recording on a scene-to-scene basis. Thus, the ease of use at a playback time can be increased.
• Furthermore, in the image management file, the file identifier of a file and the thumbnail image of the file are entered on a capture date basis in the order of capture time. In addition, thevideo camera1 has a function of displaying the selection screen CS (seeFIG. 4) for selecting the files recorded on the storage medium SM on a capture date basis using the thumbnail images and the edit menu screen EMS (seeFIG. 7) on thedisplay unit6. This function allows the identifier of the video file DMFx or the still image file DJFy having the date that is the same as the date selected via the displayed screen and the thumbnail image corresponding to the file to be entered in the order of selection.
• Accordingly, thevideo camera1 can further categorize the files automatically grouped on a capture date basis into a different group in response to the selection operation performed by a user. Therefore, the user can effectively manage the files while keeping the management on the basis of a date. Thus, the ease of use at a playback time can be further increased.
• Additionally, since thevideo camera1 stores the thumbnail images in the image management file, thecontrol unit2 can decrease the time required for finding the desired thumbnail image compared with the design in which the thumbnail images are placed in an area other than the image management file. As a result, thevideo camera1 can decrease the time required for displaying the selection screen CS (seeFIG. 4) on thedisplay unit6 on the basis of the thumbnail images. Thus, the time a user is required to wait before the screen appears can be decreased.
• Furthermore, thevideo camera1 has a function of deleting some of the identifiers and thumbnail images having a predetermined date and being entered in the order of selection in response to performance of the selection operation instructed by the user. Alternatively, thevideo camera1 has a function of changing the order of selection.
• Accordingly, thevideo camera1 can edit the files grouped in accordance with performance of the selection operation instructed by the user. Thus, the user can further manage the files depending on the user's preference.
• According to the above-described configuration, each time the video file DMFx or the still image file DJFy is recorded on the storage medium SM, the identifier of that file is entered (seeFIG. 2) in the image management file on a capture date basis in the order of capture time. Therefore, thevideo camera1 can automatically group the files on a capture date basis for each type of file. In general, personal events occur on the basis of a date. Therefore, thevideo camera1 can effectively manage the files recorded on the storage medium SM so as to be friendly to users.
(4) Other Exemplary Embodiments
• In the above-described exemplary embodiments, when the edit item “register images in the playlist on a capture date basis” is selected in the edit menu screen EMS (seeFIG. 7), the date selection screen CSD (seeFIG. 8) of the entered date is displayed. Thereafter, it is asked whether an image having the date selected via the date selection screen CSD is added to the playlist using the confirmation screen CSX (seeFIG. 9). However, the present invention is not limited thereto. Alternatively, when the selection operation is performed, it may be considered that the date displayed in thedate display section12 at that time is selected. Thus, it may be asked whether an image having that date is added to the playlist using the confirmation screen CSX (seeFIG. 9).
• Additionally, in the above-described exemplary embodiments, one video playlist and one still image playlist are created in the lower layer of the favorite folder in the image management file (seeFIG. 2). However, the present invention is not limited thereto. Alternatively, these playlists may be created in response to the setting operation performed by a user.
• More specifically, before thecontrol unit2 makes an entry in the file information folder in the video playlist folder or the still image playlist folder, thecontrol unit2 may display a screen on thedisplay unit6 for prompting a user to select whether the existing playlist or a newly created playlist is entered. On the basis of the selection result, thecontrol unit2 can make the entry in the target file information folder.
• In this way, a playlist that further meets the user's preference can be created compared with the above-described embodiment in which the playlist is simply separated depending on the type of file.
• Furthermore, in the above-described exemplary embodiments, the present invention is applied to thevideo camera1. However, the present invention is applicable to a variety of image recording apparatuses, image playback apparatuses, or image recording/playback apparatuses having a function of processing an image. Examples of such apparatuses include a personal computer, a personal digital assistant (PDA), a hard disk recorder (HDR), and a digital still camera.
• It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.

Claims (10)

What is claimed is:

1. An image recording apparatus comprising:

image capturing means for capturing an image of a subject;

recording means for recording one of still image data and video image data captured by the image capturing means on a storage medium in the form of an image file;

generating means for generating a management file used for managing the image file recorded on the storage medium; and

registering means for registering an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.

2. The image recording apparatus according toclaim 1, further comprising:

an operation unit for receiving a user input;

displaying means for displaying image data recorded on the storage medium;

display controlling means for controlling the displaying means to display a screen for prompting a user to select the image file recorded on the storage medium on a capture date basis using the management file; and

second registering means for registering the identifier of the one or more image files having a capture date that is the same as the date selected via the screen in the management file in the order of selection.

3. The image recording apparatus according toclaim 1, wherein the registering means registers a thumbnail image corresponding to the image file recorded on the storage medium in the management file, the apparatus further comprising:

display controlling means for controlling displaying means to display a screen for prompting a user to select the image file recorded on the storage medium on a capture date basis on the basis of the thumbnail image; and

second registering means for registering the identifier of the one or more image files having a capture date that is the same as the date selected via the screen and an identifier of the thumbnail image corresponding to the image file in the management file in the order of selection.

4. The image recording apparatus according toclaim 3, further comprising:

editing means for deleting one or more of the identifiers of the image files registered by the second registering means and the identifier of the thumbnail image corresponding to the image file or changing the order of selecting the identifier of the image file and the identifier of the thumbnail image corresponding to the image file.

5. A method for recording an image, comprising the steps of:

(a) capturing an image of a subject;

(b) recording one of still image data and video image data captured in step (a) on a storage medium in the form of an image file;

(c) generating a management file used for managing the image file recorded on the storage medium; and

(d) registering an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.

6. The method for recording an image according toclaim 5, further comprising the steps of:

(e) controlling displaying means to display a screen for prompting a user to select the image file recorded on the storage medium on a capture date basis using the management file; and

(f) registering the identifier of the one or more image files having a capture date that is the same as the date selected via the screen in the management file in the order of selection.

7. The method for recording an image according toclaim 5, wherein step (d) registers a thumbnail image corresponding to the image file recorded on the storage medium in the management file, the method further comprising the steps of:

(e) controlling displaying means to display a screen for prompting a user to select the image file recorded on the storage medium on a capture date basis on the basis of the thumbnail image; and

(f) registering the identifier of the one or more image files having a capture date that is the same as the date selected via the screen and an identifier of the thumbnail image corresponding to the image file in the management file in the order of selection.

8. The method for recording an image according toclaim 7, further comprising the step of:

(g) deleting one or more of the identifiers of the image files registered in step (f) and the identifier of the thumbnail image corresponding to the image file or changing the order of selecting the identifier of the image file and the identifier of the thumbnail image corresponding to the image file.

9. A program, executed by a computer, comprising program code for performing the steps of:

(a) controlling image capturing means to capture an image of a subject;

(b) controlling recording means to record one of still image data and video image data captured by the image capturing means on a storage medium in the form of an image file;

(c) generating a management file used for managing the image file recorded on the storage medium; and

(d) registering an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.

10. An image recording apparatus comprising:

an image capturing unit configured to capture an image of a subject;

a recording unit configured to record one of still image data and video image data captured by the image capturing unit on a storage medium in the form of an image file;

a generating unit configured to generate a management file used for managing the image file recorded on the storage medium; and

a registering unit configured to register an identifier of the image file recorded on the storage medium in the management file on a capture date basis in the order of capture time.

Images