JP2009282633A - Image reproduction device, its control method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide image reproduction technology for comprehending, at a glance, even contents of an image file wherein a user is difficult to comprehend the contents by only a file name or a thumb nail. <P>SOLUTION: This image reproduction device reproducing an image file recorded in a storage medium has: an acquisition means acquiring the image file from the storage medium; a decision means deciding whether the image file acquired by the acquisition means is a document image file that is an image file having scheduled reproduction order; and a display means for list-displaying the image files acquired by the acquisition means. The display means displays first index information on the vicinity of the document image file when the list-displayed image file is the document image file, and displays second index information different from the first index information on the vicinity of the image file when it is not the document image file. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image reproduction technique for reproducing image files having different attributes.

  In presentations and the like, it is common to explain presentation text data created by a PC (personal computer) while being reproduced by a projector or the like so that the viewer can understand visually. Furthermore, if the projector has a built-in application capable of handling text data, a recording medium storing text data can be connected, and presentation can be performed by selecting and playing back image data on the UI screen of the projector. .

  Here, the user, it is necessary to select with or play which image previously viewed UI screen. Patent Document 1 describes a technique for displaying a list of file thumbnails on an image playback device and reading a sentence name, remarks, date of creation, and the like when reading a file stored on a recording medium. . This makes it possible to select a target file.

  Also known is a method of converting a so-called slide in a file created with presentation software into an image file. According to this method, even a device that cannot handle presentation software can execute a presentation by sequentially reproducing the converted image data.

  FIG. 22 shows an example of a screen projected by the projector when a recording medium storing a presentation file converted into an image file is connected to the projector.

  In 2201, a list of file names of image files is displayed. When a file name is selected by a user operation, image data corresponding to the file name and its attribute information are read and displayed in areas 2202 and 2203.

  FIG. 23 shows an example when the projector displays a list of presentation image files.

In this case, thumbnails of image data are displayed in 2301A to 2309A, and file names corresponding to the vicinity of the thumbnails are displayed.
JP 05-046676 A

  However, in the example shown in FIG. 22, since the file name is only displayed in the area 2201, the user cannot grasp the contents of each image file at first glance, which is inconvenient.

  Further, in the list display as shown in FIG. 23, the user can roughly grasp what kind of photograph the image data shot by the camera or the like is by viewing the thumbnail. However, in the case of the image data converted from the text file, many fine characters are often included. Therefore, when thumbnails 2301A to 2309A obtained by reducing these are displayed, characters are crushed and it is difficult to grasp the contents.

  In order to solve any of the above problems, an image reproduction device according to the present invention is an image reproduction device that reproduces an image file recorded on a storage medium, and an acquisition unit that acquires the image file from the storage medium; Determining means for determining whether the image file acquired by the acquiring means is a document image file that is an image file having a scheduled reproduction order; and display means for displaying a list of the image files acquired by the acquiring means; And when the image file displayed as a list is the document image file, the display means displays first index information in the vicinity of the document image file, and when the image file is not the document image file, Second index information different from the first index information is displayed in the vicinity of the image file.

  Further, the present invention is a method for controlling an image playback device for playing back an image file recorded on a storage medium, the acquisition step of acquiring an image file from the storage medium, and the image file acquired by the acquisition step, A determination step for determining whether or not the document image file is an image file having a scheduled reproduction order; and a display step for displaying a list of image files acquired by the acquisition step. When the displayed image file is the document image file, the first index information is displayed in the vicinity of the document image file. When the displayed image file is not the document image file, the first index information is displayed in the vicinity of the image file. Second index information different from is displayed.

  According to the present invention, the user can grasp the contents at a glance even if it is difficult to grasp the contents only by the file name or the thumbnail.

  The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

  The embodiment described below is an example as means for realizing the present invention, and should be appropriately modified or changed according to the configuration and various conditions of the apparatus to which the present invention is applied. It is not limited to the embodiment.

[First Embodiment]
FIG. 1 is a diagram showing a configuration of an image reproduction apparatus according to an embodiment of the present invention.

  Reference numeral 100 denotes a liquid crystal projector. A projection lens 118 of the liquid crystal projector 100 projects on the screen 119 and displays an image and a UI (user interface) screen on the screen 119. The projection lens 118 includes a plurality of lenses, and can perform optical zoom / focus adjustment and the like.

  Reference numeral 106 denotes a USB I / F for USB connection with an external device. Reference numeral 200 denotes a USB memory, and the liquid crystal projector 100 can be connected to the USB memory 200 via the USB I / F 106. Reference numeral 400 denotes a remote controller (hereinafter referred to as a remote controller), and the liquid crystal projector 100 can receive an operation of the remote controller 400 as an infrared signal via the remote control light receiving unit 120. The communication medium of the system constructed in this embodiment may be a wired / wireless LAN, Bluetooth, or the like, and is not limited to the system form exemplified here.

  In this embodiment, the USB memory 200 supports the mass storage class, and the liquid crystal projector 100 supports the mass storage class and PictBridge via the USB I / F 106. When the USB memory 200 or a digital camera is connected to the liquid crystal projector 100, communication is started using a mass storage protocol. Thereby, the liquid crystal projector 100 can read the data recorded in the USB memory 200 or the digital camera.

  In this embodiment, the USB memory is applied as the external storage. However, the present invention does not limit the external storage to the USB memory. For example, the external storage can be realized by a device having an image data holding function such as a card reader. is there.

  Although the USB memory 200 is recognized as a mass storage class device, the present invention does not limit the method of recognizing external storage.

  Further, the present invention is not limited to the above protocol, and for example, the liquid crystal projector 100 may support the PTP protocol.

  Further, the present invention is not limited to the liquid crystal projector 100, and can be realized by, for example, a display device such as a PC or a television.

  The USB memory 200 records an image file (hereinafter referred to as a photo image file) taken by a digital camera or the like, and an image file (hereinafter referred to as a document image file) obtained by converting a text file created by a document creation application page by page. Has been. The text file created by the document creation application referred to in this embodiment includes, for example, a file created by word processing software, spreadsheet software, presentation creation software, or the like.

  Here, a data group constituting a photographic image file is defined as photographic image data, and a data group constituting a document image file is defined as document image data. In the present embodiment, it is assumed that the photographic image file and other document image files have the same extension (for example, JPG extension). A user can convert a text file into a document image file using a dedicated application in a personal terminal such as a PC. For example, the case of Microsoft Office PowerPoint (registered trademark) manufactured by Microsoft Corporation will be described.

  In this case, it is possible to convert a text file for presentation consisting of a plurality of slides into an image file for each slide (for example, JPEG file exchange format). That is, it is possible to convert one presentation file composed of 10 slides into 10 JPEG files.

  The characteristics of the document image file created as described above are that it is often played back in the planned playback order, that is, the slide or page order of the original text file, and the final page is often reached. is there.

  In this embodiment, the user can remotely operate the UI screen projected on the screen 119 by the liquid crystal projector 100 using the remote controller 400. In the present invention, the present invention is not limited to the operation by the remote controller 400, but can be realized by the user operating the operation unit 103 of the liquid crystal projector 100.

  FIG. 2 is a block diagram showing the configuration of the liquid crystal projector according to the embodiment of the present invention.

  In FIG. 2, reference numeral 109 denotes a system control circuit that controls the entire liquid crystal projector 100, and controls each unit based on an input signal and a program from each unit. A memory 101 temporarily stores constants, variables, images, and the like for operation of the system control circuit 109. Reference numeral 102 denotes an electrically erasable / recordable nonvolatile memory in which a firmware program of the system control circuit 109 is recorded. Reference numeral 103 denotes an operation unit for inputting various operation instructions of the system control circuit 109. The operation unit 103 includes a single or a combination of a switch, a dial, a touch panel, pointing based on eye-gaze detection, a voice recognition device, and the like.

  Reference numeral 120 denotes a remote control light receiving unit for inputting various operation instructions of the system control circuit 109, and can receive a key event (operation signal) from the remote control 400 attached to the liquid crystal projector 100.

  A power control unit 104 includes a DC-DC converter, a switch circuit that switches a block to be energized, and the like. The power supply control unit 104 detects the AC adapter, controls the DC-DC converter based on the detection result and an instruction from the system control circuit 109, and supplies a necessary voltage to each unit including the fan for a necessary period. Reference numeral 105 denotes a power supply unit composed of an AC adapter or the like.

  Reference numeral 107 denotes an Ethernet (registered trademark) I / F (interface) for network connection with an external device. It is possible to notify the system that centrally manages the liquid crystal projector 100 of a failure or the like of the liquid crystal projector 100. Reference numeral 106 denotes a USB I / F for USB connection with a digital camera, a USB memory, or the like. An image processing unit 108 performs processing for setting a display position of a JPEG image read from a digital camera, a USB memory, or the like, and processing for overlaying information such as a file name / date / Exif. Also, the processed image data is digitally converted into RGB signals composed of three kinds of color signals of red (R) / green (G) / blue (B).

  A projector video signal processing circuit 111 performs signal processing for converting digitized RGB signals into display signals suitable for the liquid crystal projector 100. Examples of the signal processing include interlace progressive conversion processing, frame rate conversion processing, resolution conversion processing, and the like. Reference numeral 110 denotes a frame memory, which is used for signal processing when the projector video signal processing circuit 111 converts the display signal into a display signal suitable for the projector, and can hold RGB signals of one frame or more. A signal level adjustment circuit 112 adjusts the output from the projector video signal processing circuit 111 to a signal level suitable for the projection image projected by the liquid crystal projector. A liquid crystal driver 113 drives the liquid crystal panel 117 based on the output signal of the signal level adjustment circuit 112.

  Reference numeral 116 denotes a lamp, which is a light source for projecting a projected image on the screen 119. A power supply unit 114 supplies power to the lamp 116, and a lamp driving circuit (ballast) 115 generates a stable high voltage to be supplied to the lamp 116 from the power supplied from the power supply 114. The R / G / B color filters are bonded to the liquid crystal panel 117, and the light projected by the lamp 116 is transmitted and blocked according to the RGB filters. The projection lens 118 forms the RGB color images that have passed through the liquid crystal panel 117 on the screen 119 and changes the size of the projection image. The screen 119 provides a projection surface on which a projection image is formed.

  FIG. 3 is a block diagram showing the configuration of the USB memory 200.

  In FIG. 3, the USB memory 200 includes a USB connection I / F 201, a CPU 202, a flash memory control unit 203, a flash memory 204, and a ROM 207. The USB connection I / F 201 performs communication with a USB device. The flash memory control unit 203 reads data from the flash memory 204 or writes data to the flash memory 204 under the control of the CPU 202. The flash memory 204 is a non-volatile memory that can be rewritten in units of pages. A ROM 207 is a read-only memory, and stores a program indicating processing to be executed by the CPU 202.

  FIG. 4 is an external view of a remote control of the liquid crystal projector.

  The remote control 400 includes a remote control light emitting unit 402, a POWER button 401, up / down / left / right direction buttons 405 to 408, an OK button 411, a focus button 403, a zoom button 404, a keystone button 409, and a menu button 410.

  The remote controller light emitting unit 402 sends a key event of the remote controller 400 to the liquid crystal projector. A POWER button 401 turns on / off the power. A focus button 403, a zoom button 404, and a keystone button 409 are buttons for adjusting focus, zoom, and keystone, respectively. For example, when adjusting the focus, the focus button 403 is pressed, and the direction buttons 405 and 408 are operated to perform the adjustment. Other settings and information can be displayed by pressing the menu button 410 and operating the direction buttons 405 to 408 and the OK button 411. Direction buttons 405 to 408 are used to specify the vertical and horizontal directions on a menu screen or the like. An OK button 411 determines a predetermined item selected on the menu screen or the like. When the remote controller 400 is operated, a key event corresponding to the operated button is sent to the liquid crystal projector 100.

  FIG. 5 shows a directory structure of image files recorded in the USB memory 200. Here, a file having a file name starting with SLD_ indicates a document image file. A file having a file name starting with IMG_ indicates a photo image file.

  In this embodiment, it is assumed that directories F0000, F1000, and F2000 exist under the ROOT folder. In the directory F0000, SLD_0001. JPG to SLD_000N. There are N JPG document image files. N is not limited to a single digit natural number. Similarly, the directory F1000 includes IMG — 1001. JPG to IMG_100N. There are N JPG photo image files. The directory F2000 contains SLD_2001. JPG to SLD_200N. A JPG document image file and a directory F2100 exist. The directory F2100 includes IMG_2101. JPG to IMG — 210N. It is assumed that a JPG photo image file exists.

  FIG. 6 is a flowchart showing the operation of the liquid crystal projector when a USB memory is attached to the liquid crystal projector.

  In FIG. 6, when the connection of the USB device is detected (S601), the liquid crystal projector 100 outputs a reset signal to the USB port (S602), and executes configuration (S603). At the time of configuration, an inquiry is made as to whether or not the inserted USB memory 200 supports the mass storage class, and a determination is made (S603). Specifically, the liquid crystal projector 100 can determine whether the USB memory 200 supports the mass storage class by acquiring the interface descriptor of the USB memory 200.

  When the USB memory 200 does not support the mass storage class (S604 / NO), processing corresponding to the supported class is performed (S609). When the liquid crystal projector 100 does not support the acquired class, it is possible to project an error display on the screen 119.

  When the USB memory 200 supports the mass storage class (S604 / YES), the liquid crystal projector 100 starts a block device mounting process (S605). Thereafter, the liquid crystal projector 100 performs a file open process (S606), and acquires the directory configuration and directory name recorded in the flash memory 204 of the USB memory 200 (S607).

  In the present embodiment, only the current directory operated by the user is acquired. However, the present invention is not limited to acquiring the current directory, and all directory configurations may be acquired.

  Finally, the liquid crystal projector 100 displays a list of directory names obtained by the search on the UI screen (S608).

  FIG. 7 is a diagram showing transition of the UI screen of the liquid crystal projector.

  If the USB device is not connected in S601 of FIG. 6, a device unconnected screen 701 shown in FIG. 7 is displayed. In S609 of FIG. 6, an unsupported device connection screen 702 for notifying the user that a device that does not support the mass storage class is connected is displayed. Further, when an error occurs in the series of processes in FIG. 6, an error display 703 is displayed. Further, in S608 of FIG. 6, the directory name list display screen 704 obtained in S607 is displayed.

  FIG. 8 illustrates a UI screen after the liquid crystal projector 100 is turned on.

  In FIG. 8, 800 indicates a UI screen projected on the screen 119, and 801 indicates in words that the liquid crystal projector 100 can be connected to a digital camera and a USB memory. 802 shows a digital camera, and 803 shows that it can be connected to a USB memory.

  FIG. 9 illustrates a UI screen displayed in S608 of FIG.

  In FIG. 9, reference numeral 900 denotes a list screen displayed by the processing in S608 of FIG. 6 after the USB memory 200 is connected, and a list of directory names and file names recorded in the USB memory 200 is displayed. . A list display field 901 displays a list of directory names and file names. In the list display column 901, directory names F0000, F1000, and F2000 in the root directory of FIG. 5 are displayed as a list, and the directory F0000 is displayed in a selected state by a cursor 902. Reference numeral 903 denotes a thumbnail display field for displaying the thumbnail of the file selected in the list display field 901. Reference numeral 904 denotes an attribute display field for displaying the attribute information of the file name selected in the same manner. The attribute display field 904 displays the file name, file size, shooting date and time, resolution, and the like, but the type of information displayed is not particularly limited to this, and is stored in, for example, Exif information of photographic image data. The shooting parameter information may be used. Details of the Exif information will be described later.

  FIG. 10 is a flowchart showing the operation of the liquid crystal projector 100 when the user presses the OK button 411 of the remote controller 400 in a state where the directory F0000 is selected on the UI screen of FIG.

  When the user presses the OK button 411 of the remote controller 400, the liquid crystal projector 100 acquires a file list in the directory from the USB memory 200 (S1001). This can be realized when the liquid crystal projector 100 issues a READ (10) command which is a command supported by mass storage. The liquid crystal projector 100 displays a list using the file list acquired in S1001.

  Next, the acquired file list is analyzed, and list display processing is continued sequentially until there is undisplayed image data in the file list and the maximum display number in the list display field is exceeded (S1002, S1003). First, image data is read from the USB memory 200 (S1004), and then it is determined whether the read image data is document image data or photographic image data (S1005). The determination process here will be described later.

  If the image data is photograph image data (S1006), it is acquired as a character string for displaying the file name of the photograph image data (S1007), and the file name is displayed in the list display field 801 (S1011). If it is document image data (S1006), it is determined whether a title is included in the header of the document image data (S1008). If the title is included, it is acquired as a character string for displaying the title (S1009), and the title (first index information) is displayed in the list display field 801 (S1011). If the title is not included, the character string obtained by removing the extension from the file name is acquired as a character string to be displayed (S1010), and the file name (second index information) is displayed in the list display column 801 ( S1011). For example, if the file name is “SLD — 0001.JPG”, “SLD — 0001” is displayed in the list display field 801. At this time, a list of character strings combined with a character string obtained by removing the extension from the directory name and file name including the document image data may be displayed. For example, if the directory name is “F0000” and the file name is “SLD — 0001.JPG”, “F0000 SLD — 0001” is displayed.

  FIG. 11 shows an example of the UI screen displayed in S1011 of FIG.

  In FIG. 11, reference numeral 1101 denotes document image data in the directory F0000, which is a list display field when a title is included in each header.

  In FIG. 11, the files in the directory F0000 are arranged in the order of the file names “SLD — 0001.JPG” to “SLD — 000N.JPG” in the list display field 1101, and the titles included in the headers of the respective document image data are displayed. Is done. For example, the document image file SLD_0001. JPG includes a character string “product strategy meeting” as a title in the header, and the document image file SLD_0002. JPG is “Agenda”, and each title is displayed in the list display field 1101.

  FIG. 12 illustrates the UI screen displayed in S1011 of FIG.

  In FIG. 12, the list display column 1201 displays the file names of photographic image data in the directory F1000 in the order of file names. If the UI screen of FIG. 12 is photographic image data (S1006) according to the flow of FIG. 10, it is acquired as a character string for displaying the file name of the photographic image data (S1007), and the file name is displayed in the list display column. (S1011).

  FIG. 13 is a flowchart showing the operation of the liquid crystal projector 100 when the user presses the down button 408 of the remote controller 400 on the UI screen of FIG.

  In FIG. 13, the liquid crystal projector 100 acquires an image file from the USB memory 200 (S1301). The liquid crystal projector 100 holds the acquired image file in the memory 101. The liquid crystal projector 100 acquires an image file having the first file name in the file list in S1001 of FIG. The liquid crystal projector 100 decodes the acquired image file (S1302), converts the JPEG image data into RGB image data, and stores it in the memory 101. In the decoding process, JPEG image data may be converted into YUV image data. The decoding process is not limited to only the conversion to RGB image data, and a conventional JPEG decoding algorithm method is used. For example, it can be realized by performing the following method.

  The liquid crystal projector 100 converts JPEG compressed data into image data of frequency components by Huffman code decoding, and restores the levels of all frequencies lowered by inverse quantization. Next, the inverse DCT transform converts the frequency component of the image data into a spatial component and restores the original image data. In the Huffman code decoding and the inverse quantization, it is possible to restore the original data by using the quantization table and the Huffman table used in the compression process.

  Next, the liquid crystal projector 100 performs resizing processing of the RGB image data generated in S1302 (S1303), and performs display processing for projecting onto the screen 119 (S1304). In the resizing process, adjustment to an image size optimal for projection onto the screen 119 is performed.

  FIG. 14 illustrates the UI screen of the liquid crystal projector 100 when the user presses the down button 408 of the remote controller 400 on the UI screen of FIG.

  In FIG. 14, SLD_0001. In directory F0000. With JPG selected (1401 in the figure), the liquid crystal projector 100 performs the display process of S1304 in FIG. 13 and displays thumbnails in the thumbnail display field 1402. In addition, the liquid crystal projector 100 includes SLD_0001. The additional information of the JPG image file is displayed in the attribute display field 1403.

  Next, screen transition when the user presses the OK button 411 of the remote control 400 on the UI screen of FIG. 14 will be described with reference to FIG.

  In FIG. 7, reference numeral 704 denotes the UI screen of FIG. Reference numeral 705 denotes a resized document image data displayed on the screen 704 and a full screen display. When the user presses the OK button 411 of the remote controller 400 in the full screen display state 705, the screen transitions to the UI screen 704. In the full screen display 705, the left direction button 406 and the right direction button 407 of the remote controller 400 can be operated to rotate the displayed image data 90 degrees to the left and 90 degrees to the right. Further, by pressing the up button 405 and the down button 408, it is possible to display the previous image data and the next image data of the displayed image data. During the display processing of the previous image data and the next image data, a progress display indicating that the display processing is in progress may be performed as in 706.

  Next, a method for determining document image data and photographic image data will be described.

  The document image data is recorded in the JFIF standard JPEG compressed file structure because it is not necessary to record additional information at the time of shooting. Also, the photographic image data is recorded in an Exif compressed file structure having additional information such as the shooting date and time when taken by an imaging device such as a digital camera.

  In the present embodiment, it is determined whether the image data is document image data or photographic image data using the difference in the file structure.

  FIG. 15 shows the compressed file structure of the Exif standard.

  In FIG. 15, reference numeral 1501 denotes a file structure of JPEG compressed data, in which an application marker segment (APP1) is inserted immediately after the SOI marker representing the head of the file, and Exif additional information is described in APP1. Reference numeral 1502 denotes an internal configuration of APP1, and APP1 includes an APP1 marker, an Exif identification code 1503, and an attached information main body. The attached information has a Tiff structure including a file header and can record up to two IFDs (0th IFD, 1st IFD). In the 0th IFD, auxiliary information regarding the compressed image (main image) is recorded. Thumbnail data can be recorded in the 1st IFD. The Exif IFD exists in order to record Exif-specific attached information in the 0th IFD. Exif IFD adjunct information can begin with the version information and record user information (1504). For example, there are exposure time, F value, ISO sensitivity, Tv, Av, focal length, photometric method, shooting date, image compression ratio, comment, and the like. There is a maker note area in the user information. The maker note area enters individual information, and the operation is left to the maker.

  FIG. 16 shows a JPEG compressed file structure of the JFIF standard.

  In FIG. 16, an application marker segment (COM) is inserted in 1601 after APP0 indicating the JFIF header, and additional information of the application is described. Reference numeral 1602 denotes an internal configuration of the COM, and the COM includes a COM marker, a COM length, and a comment part. When a user uses a dedicated application on a personal terminal such as a PC to create a document image file, the application name can be described in the comment portion. For example, in Microsoft Office PowerPoint (registered trademark) and Word (registered trademark) manufactured by Microsoft Corporation, a character string of Software: Microsoft Office is described in a comment part of COM.

  In this example, when a user converts from a text file to a document image file page by page using a dedicated application on a personal terminal such as a PC, the comment is included in the application marker segment (COM) of the document image file. Write the page title.

  FIG. 17 is a flowchart showing processing for determining whether document image data or photographic image data.

  In FIG. 17, the liquid crystal projector 100 reads image data (S1701) and detects an Exif identification code (S1702).

  Next, the liquid crystal projector 100 determines whether or not the Exif identification code has been detected (S1703). If it is determined that the Exif identification code has been detected, it is determined as photographic image data (S1710). If it is determined that the Exif identification code cannot be detected, the application marker segment (COM) is searched (S1704). If a COM marker exists (S1705), a comment is acquired (S1706), and the document creation application name is detected from the comment (S1707). Specifically, if the document creation application is Microsoft Office PowerPoint (registered trademark) manufactured by Microsoft Corporation, a character string of Microsoft Office PowerPoint (registered trademark) is detected. In the present embodiment, the liquid crystal projector 100 can detect a document creation application name by holding a character string of an application name in advance and collating it with a character string included in a COM marker.

  If the liquid crystal projector 100 can detect the document creation application name (S1708), it is determined as document image data (S1709).

  Since a plurality of application marker segments (COM) may be described, the search is repeated while the COM marker exists.

  The above is the method for determining whether it is photographic image data or document image data in this embodiment. According to the above embodiment, when the liquid crystal projector 100 displays a list of data stored in the USB memory 200, the attribute of the file is determined, and if it is a photo image, the file name is displayed in a list. If it is a document image, a list of page titles is displayed. As a result, the user can easily determine a text file whose contents cannot be estimated only by the file name and thumbnail. Also, compared to the case where the file name and title are always displayed, the limited display area can be used effectively, and a larger number of image files can be displayed in a list.

  In this embodiment, if there is an Exif field, it is determined that the image data is photographic image data. However, the present invention is not limited to this. In this embodiment, if there is no Exif field and the document creation application name of the document image data can be detected from the comment of the application marker segment (COM), the document image data is determined. However, the present invention is not limited to this. For example, when the document image data is also created in the Exif compressed file structure and the title of the document image data is stored in the Exif field, it is determined whether it is document image data or photographic image data by a method other than the above. There is a need. In this case, both may be discriminated from the file source in the Exif field indicating from which device the image was obtained, or both may be distinguished from other values. Further, photographic image data and document image data may be determined by performing image analysis.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described with reference to FIG. Here, the description will focus on differences from the first embodiment described above.

  FIG. 18 illustrates a UI screen according to the second embodiment.

  In the present embodiment, document image data “SLD — 0001.JPG” to “SLD — 0009.JPG” are stored in the current directory. The header of each document image data includes character strings “World Flat Panel Display Markets”, “Agenda”, “Background”, “Overview” to “Forecast 2012” indicating titles.

  Here, according to the list display process (FIG. 10) and the determination process of the document image data and the photographic image data (FIG. 17) according to the first embodiment, the title 1801B of the document image data near the thumbnails 1801A to 1809A of the document image data. ~ 1809B are displayed.

  According to the second embodiment, file attributes are determined when a list of thumbnails of image data stored in the USB memory 200 is displayed, and if it is photographic image data, the file name is displayed near the thumbnail. If it is a document image, the page title is displayed near the thumbnail. Accordingly, even when image data with many characters such as image data for presentation is displayed in a list, the user can roughly grasp the contents of the document image data by looking at the titles near the thumbnails.

[Third Embodiment]
Next, a third embodiment according to the present invention will be described with reference to FIG. Here, only differences from the first embodiment will be described.

  In this embodiment, a case where a photographic image file and a document image file are recorded in the USB memory 200 will be described.

  The liquid crystal projector 100 according to the present embodiment has a directory structure different from that of the first embodiment shown in FIG. Specifically, it is assumed that document image data (SLD_0001.JPG to SLD_00N.JPG) and photographic image data (IMG_0001.JPG to IMG_000N.JPG) are mixed in the same directory.

  An example of the UI screen in this embodiment is shown in FIG. In FIG. 19, it is assumed that the headers of document image data (SLD_0001.JPG to SLD_0006.JPG) include the titles “Commodity Strategy Meeting”, “Agenda”, and “Effect of Olympics”, respectively.

  Here, according to the list display process (FIG. 10) and the document image data / photograph image data determination process (FIG. 17) according to the first embodiment, the title (“product strategy meeting”) of the document image data is displayed in the list display column 1901. , “Agenda”, ~, “Olympics Influence”). For photographic image data (IMG — 0001.JPG to IMG — 0006.JPG), file names are displayed.

  According to this embodiment, even when document image data and photo image data are mixed in the same directory, the document image data displays a list of titles, so the user can grasp the rough contents at a glance. It becomes possible to do.

  In the present embodiment, the description has been made so that the file names of photographic image data are displayed as a list, but the present invention is not limited to this. For example, regarding the photographic image data, other information included in the Exif field of the photographic image data such as the shooting date and time and shooting information can be displayed.

[Fourth Embodiment]
Next, a fourth embodiment according to the present invention will be described with reference to FIGS. Here, only differences from the first embodiment will be described.

  In the present embodiment, in particular, the title of the document image file is described in the index file stored in the USB memory 200 instead of the header of the document image file.

  An index file is a file different from an image file or the like, and is an image file that is a target of processing such as output, or a file that describes the order of processing. An example of an index file is a DPOF (Digital Print Order Format) file.

  FIG. 20 illustrates an index file describing a list of a plurality of document image files.

  20, the titles of the document image files 2003 to 2006 are set in the index file 2001 as “CFG DSC“ Front Page ”? ATR CMT” to “CFG DSC“ Issue ”? ATR CMT”. In “IMG SRC =”, a path to a document image file (2003 to 2006) stored in the USB memory 200 is designated.

  In this example, a user converts a text file into a document image file page by page using a dedicated application on a personal terminal such as a PC. At this time, the PC writes the title for each page of the document image file in the index file 2001 when the document image file is stored in the USB memory 200.

  FIG. 21 is a flowchart showing the operation of the liquid crystal projector 100 when the user presses the OK button 411 of the remote controller 400 in a state where the directory F0000 is selected on the UI screen of FIG.

  In FIG. 21, when the user presses the OK button 411 of the remote controller 400 in a state where the directory F0000 is selected on the UI screen of FIG. 9, the liquid crystal projector 100 acquires an index file from the USB memory 200 (S2101). This can be realized when the liquid crystal projector 100 issues a READ (10) command which is a command supported by mass storage. The liquid crystal projector 100 displays a list using the file list acquired in S2101.

  Next, the acquired file list is analyzed, and list display processing is continued sequentially until there is undisplayed image data in the index file and the maximum display number in the list display field is exceeded (S2102 and S2103). First, image data is read from the USB memory 200 (S2104), and then it is determined whether the read image data is document image data or photographic image data (S2105). This determination process is the same as in the first embodiment.

  If the image data is photographic image data (S2106), it is acquired as a character string for displaying the file name of the photographic image data (S2107), and the file name is displayed in the list display column 901 (S2111). If it is document image data (S2106), it is determined whether a title is included in the index file 2001 (S2108). If the title is included, it is acquired as a character string for displaying the title (S2109), and the title is displayed in the list display field 801 (S2111). For example, the document image data “SLD — 0001.JPG” (2003) displays “Front Page” as the title.

  If the title is not included, the character string obtained by removing the extension from the file name is acquired as a character string to be displayed (S2110), and the file name is displayed in the list display field 801 instead of the title (S2111). For example, if the file name is “SLD — 0001.JPG”, “SLD — 0001” is displayed in the list display field 901. At this time, a list of character strings combined with a character string obtained by removing the extension from the directory name and file name including the document image data may be displayed. For example, if the directory name is “F0000” and the file name is “SLD — 0001.JPG”, “F0000 SLD — 0001” is displayed. The UI screen displayed in S2111 is as shown in FIG.

  Also in the fourth embodiment, the same effect as in the first embodiment can be obtained.

  It is possible to combine the first to fourth embodiments as appropriate, or to combine only a part thereof.

[Other Embodiments]
Although the present invention has been described by taking a projector as an example, the present invention can also be applied to other image reproduction apparatuses such as a television.

  The object of the present invention can also be achieved by supplying a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus. That is, it goes without saying that this can also be achieved by the computer (CPU or MPU) of the system or apparatus reading and executing the program code stored in the storage medium.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile semiconductor memory card, ROM, or the like can be used. . Further, the functions of the above-described embodiments may be realized by executing the program code read by the computer.

  However, there is a case where an OS (operating system) or the like running on the computer performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Needless to say, it is included.

  Furthermore, the program code read from the storage medium may be written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Needless to say.

It is a figure which shows the structure of the image reproduction apparatus of embodiment which concerns on this invention. It is a block diagram which shows the structure of the liquid crystal projector of embodiment which concerns on this invention. It is a block diagram which shows the structure of the USB memory of embodiment which concerns on this invention. 1 is an external view of a remote controller according to an embodiment of the present invention. It is a figure which shows the directory structure of 1st Embodiment which concerns on this invention. 4 is a flowchart illustrating an operation when a USB memory is connected to the liquid crystal projector according to the first embodiment of the present invention. It is a figure which shows the transition of UI screen of 1st Embodiment which concerns on this invention. It is a figure which shows UI screen of 1st Embodiment which concerns on this invention. It is a figure which shows UI screen of 1st Embodiment which concerns on this invention. 3 is a flowchart showing an operation of the liquid crystal projector in the first embodiment according to the present invention. It is a figure which shows UI screen of 1st Embodiment which concerns on this invention. It is a figure which shows UI screen of 1st Embodiment which concerns on this invention. 3 is a flowchart showing an operation of the liquid crystal projector in the first embodiment according to the present invention. It is a figure which shows UI screen of 1st Embodiment which concerns on this invention. It is a figure which shows the JPEG compression file structure of Exif specification. It is a figure which shows the JPEG compression file structure of a JFIF standard. 3 is a flowchart showing an operation of the liquid crystal projector in the first embodiment according to the present invention. It is a figure which shows UI screen of 2nd Embodiment which concerns on this invention. It is a figure which shows UI screen of 3rd Embodiment which concerns on this invention. It is a figure which shows the structure of the index file of 4th Embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the liquid-crystal projector of 4th Embodiment concerning this invention. It is a figure which illustrates UI screen of the conventional liquid crystal projector. It is a figure which illustrates UI screen of the conventional liquid crystal projector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Liquid crystal projector 101 Memory 102 Non-volatile memory 103 Operation part 104 Power supply control part 105 Power supply part 106 USB I / F
108 Image processing circuit 109 System control circuit 110 Frame memory 111 Projector video signal processing circuit 112 Signal level adjustment circuit 113 Liquid crystal driver 115 Lamp drive circuit (ballast)
116 Lamp 117 Liquid crystal panel 118 Projection lens 119 Screen 120 Remote control light receiving unit 200 USB memory 400 Remote control

Claims (12)

An image reproduction device for reproducing an image file recorded on a storage medium,
Obtaining means for obtaining an image file from the storage medium;
Determining means for determining whether the image file acquired by the acquiring means is a document image file that is an image file having a scheduled reproduction order;
Display means for displaying a list of image files acquired by the acquisition means,
The display means displays first index information in the vicinity of the document image file when the displayed image file is the document image file, and displays the first index information in the vicinity of the image file when the image file is not the document image file. 2. An image reproduction apparatus characterized by displaying second index information different from the first index information.   2. The image reproducing apparatus according to claim 1, wherein the document image file is generated by converting a text file composed of a plurality of pages into an image file page by page.   The image reproducing apparatus according to claim 1, wherein the determination unit acquires attribute information from the image file, and determines the image file using the acquired attribute information. The image file includes the document image file and a photo image file that is an image file that does not have a scheduled playback order,
4. The image reproducing apparatus according to claim 1, wherein the document image file and the photographic image file are mixedly recorded on the storage medium.   The display means displays a list of titles as the first index information if the image file displayed as a list is the document image file, and displays a list of file names as the second index information if the image file is not the document image file. The image reproduction apparatus according to claim 1, wherein the image reproduction apparatus is an image reproduction apparatus. The display means displays a list of thumbnails of the image files acquired by the acquisition means,
If it is the document image file, a title is displayed near the thumbnail as the first index information, and if it is not the document image file, a file name is displayed near the thumbnail as the second index information. The image reproducing device according to claim 1, wherein   7. The image reproduction apparatus according to claim 5, wherein the title of the document image file is included in a header of the document image file.   7. The image reproduction apparatus according to claim 5, wherein the title of the document image file is included in an index file of the document image file.   When the title of the document image file is not included in the header or the index file, the display means displays a character string obtained by removing the extension from the file name of the document image file instead of the title. The image reproducing device according to claim 7 or 8, wherein the image reproducing device is characterized in that:   If the title of the document image file is not included in the header or the index file, the display means expands from the directory name in which the document image file is stored instead of the title and the file name of the document image file 9. The image reproducing apparatus according to claim 7, wherein a character string composed of character strings excluding children is displayed. A control method of an image playback device for playing back an image file recorded on a storage medium,
An acquisition step of acquiring an image file from the storage medium;
A determination step of determining whether the image file acquired by the acquisition step is a document image file which is an image file having a scheduled reproduction order;
A display step of displaying a list of image files acquired by the acquisition step,
In the display step, when the image file displayed as a list is the document image file, the first index information is displayed near the document image file. When the image file is not the document image file, the first index information is displayed near the image file. A control method for displaying second index information different from the first index information.   The program for making the computer of an image reproduction apparatus perform the control method of Claim 11.

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