JP2005338156A - Image supplying device, image display device, image display system, image supplying method, and image display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a subject within an image in a correct attitude. <P>SOLUTION: An image supplying device 1 comprises; a communication means 19 for transmitting an image file 21 to an image display device 2 and displaying the image of the image file 21 on the image display device 2; and a rotation instruction transmitting means 45 for transmitting a rotation instruction to display the rotated image of the image displayed on the image display device 2 on the same display 2, to the communication means 19. An image display system comprises; the image supplying device 1; and the image display device 2 for rotating the image displayed on the basis of the rotation instruction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image supply device, an image display device, an image display system, an image supply method, and an image display method.

  Patent Documents 1 and 2 disclose a printing system. In these conventional printing systems, a USB storage class device digital camera and a USB host printer are directly connected via USB. The camera generates print setting data and a print request based on the button operation. In the print setting data, the number of prints, paper type, paper size, print quality, image correction, print layout, print target image, and the like are designated. The camera returns a print request in response to the “Interrupt In” command of the printer. When the printer receives this print request, it reads the print setting data from the camera. Further, the printer reads the image file of the print target image specified by the print setting data from the camera and executes printing.

JP 2003-256154 A (abstract) Japanese Unexamined Patent Publication No. 2003-256170 (abstract)

  As described above, in a conventional printing system, a printer to which a digital camera is connected acquires a print instruction such as a print layout and an image file related to the print from the digital camera, and prints an image of the image file. Can be assigned to the paper and printed. Therefore, without using a personal computer or the like, the printer can directly acquire data necessary for printing from the digital camera, and so-called direct printing is realized.

  By the way, when imaging with a digital camera, in addition to the need to print the captured image with a printer, there is a need to view the captured image with an image display device such as a display device.

  The image display device has a communication function substantially similar to that of the printer of the conventional printing system described above, and obtains a display instruction and an image file related to the display from the digital camera, so that an image captured by the digital camera can be obtained. It is possible to display.

  When the image display device displays the image of the image file based on the display instruction similar to the print instruction to the printer, the image display device reads the image data in the image file in order from the top, and the images are displayed in a certain order. The value of each pixel is determined.

  The display screen of the image display device is generally horizontally long. In addition, an image captured by a digital camera is generally horizontally long.

  As a result, for example, when an image is taken with the digital camera in the vertical direction so that the vertical (vertical) direction of the subject is the longitudinal direction of the image, the captured image is displayed on the display screen of the image display device. It will be displayed in the horizontal orientation. That is, the subject is displayed on the image display device in a direction different from that at the time of imaging.

  The present invention has been made in view of the above problems, and provides an image supply device, an image display device, an image display system, an image supply method, and an image display method capable of displaying a subject in an image in a correct orientation. With the goal.

  One of the image supply apparatuses according to the present invention transmits an image file to an image display apparatus, and causes the image display apparatus to display an image of the image file, and rotates the image displayed on the image display apparatus. A rotation instruction transmission unit that transmits a rotation instruction to display the image on the image display device to the transmission unit.

  If this configuration is adopted, the image of the image file transmitted to the image display device can be displayed, and the image can be rotated and displayed based on the rotation instruction. Therefore, the subject in the image can be displayed in the correct orientation on the image display device.

  One of the image supply apparatuses according to the present invention includes a storage unit that stores a rotation instruction in addition to the configuration of the above-described invention, and a rotation instruction related to an image file that the transmission unit transmits to the image display apparatus is a storage unit. When the image file is transmitted, the rotation instruction stored in the storage means is transmitted to the image display device, and the rotated image is displayed.

  If this configuration is adopted, when an image of an image file that has been rotated and displayed on the image display device is displayed again on the image display device, a rotation instruction is automatically transmitted when the image file is transmitted.

  One of the image display apparatuses according to the present invention includes an image file and a receiving unit that receives a rotation instruction for rotating and displaying the image of the image file, a display unit that displays an image of the image file, and an image file. Generating means for causing the display means to display an image of the image file on the display means, and when the rotation instruction is received, the display means to display an image obtained by rotating the image displayed on the display means; It is what has.

  If this configuration is adopted, an image obtained by rotating the image of the received image file based on the rotation instruction can be displayed. Therefore, the subject in the image can be displayed in the correct orientation on the image display device.

  One of the image display devices according to the present invention includes an image file and a reception unit that receives a rotation instruction for rotating and displaying the image of the image file, an image file storage unit that stores the received image file, The display means for displaying the image of the image file and the image of the image file stored in the image file storage means are displayed on the display means, and when the rotation instruction is received, the image displayed on the display means is rotated. Generating means for displaying an image on the display means.

  If this configuration is adopted, it is possible to store the received image file and display an image obtained by rotating the image of the stored image file based on a rotation instruction. Therefore, the subject in the image can be displayed in the correct orientation on the image display device.

  One of the image display apparatuses according to the present invention includes a rotation instruction storage unit that stores the rotation instruction received by the reception unit in addition to the configuration of each of the above-described inventions, and the generation unit stores the image of the image file. In the case of displaying again on the display means, when a rotation instruction for the image file is stored in the rotation instruction storage means, an image obtained by rotating the image of the image file is displayed on the display means.

  By adopting this configuration, when an image of an image file that has been rotated and displayed is displayed again, the image of the image file can be automatically rotated and displayed.

  One of the image display apparatuses according to the present invention includes a rotation instruction storage unit that stores a rotation instruction received by the reception unit and an operation unit in addition to the configuration of each of the above-described inventions, and the generation unit operates the operation unit. When a predetermined operation is performed on the part, when a rotation instruction for the image file is stored in the rotation instruction storage unit, an image obtained by rotating the image of the image file is displayed on the display unit.

  By adopting this configuration, it is possible to display the previously displayed image in the correct orientation using the operation unit of the image display device.

  One of the image display devices according to the present invention includes a decoding unit that decodes image data compressed irreversibly in addition to the configuration of each of the above-described inventions, and the reception unit is irreversibly compressed. An image file storing image data is received, and the generation unit displays an image of the image data obtained by decoding the image data of the image file received by the reception unit by the decoding unit.

  If this configuration is adopted, the image quality deteriorates due to re-encoding of the image, as in the case where the image of the image file is rotated in the image supply device, and the rotated image is compressed irreversibly again to generate the image file. Will not occur. As a result, the image of the image file can be displayed while maintaining its quality.

  The image display system according to the present invention includes the image supply device according to any one of the above-described inventions and the image display device according to any one of the above-described inventions.

  If this configuration is adopted, the subject in the image can be displayed in the correct orientation.

  One of the image supply methods according to the present invention includes a step of transmitting an image file to an image display device and displaying the image of the image file on the image display device, and rotating an image displayed on the image display device. Transmitting a rotation instruction for causing the image display device to display the displayed image.

  If this method is adopted, the image of the image file transmitted to the image display device can be displayed on the image display device, and the image can be rotated and displayed based on the rotation instruction. Therefore, the subject in the image can be displayed in the correct orientation on the image display device.

  One of the image display methods according to the present invention includes a step of receiving an image file, a step of displaying an image of the received image file on a display unit, and rotating an image of the image file displayed on the display unit. The method includes a step of receiving a rotation instruction for display, and a step of displaying an image obtained by rotating the image displayed on the display unit on the display unit when the rotation instruction is received.

  If this configuration is adopted, an image obtained by rotating the image of the received image file based on the rotation instruction can be displayed. Therefore, the subject in the image can be displayed in the correct orientation on the image display device.

  One of the image display methods according to the present invention includes a step of receiving an image file, a step of storing the received image file in an image file storage unit, and an image of the image file stored in the image file storage unit as a display unit. A step of displaying, a step of receiving a rotation instruction for rotating and displaying the image of the image file displayed on the display means, and an image obtained by rotating the image displayed on the display means when receiving the rotation instruction Displaying on the display means.

  If this configuration is adopted, an image obtained by rotating the image of the received image file based on the rotation instruction can be displayed. Therefore, the subject in the image can be displayed in the correct orientation on the image display device.

  Hereinafter, an image supply device, an image display device, an image display system, an image supply method, and an image display method according to embodiments of the present invention will be described with reference to the drawings. The image supply device will be described using a digital still camera as an example. The image supply method will be described as a part of the operation of the digital still camera. The image display device will be described using a display device as an example. The image display method will be described as a part of the operation of the display device.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of an image display system according to Embodiment 1 of the present invention. The image display system includes a digital still camera (DSC) 1 as an image supply device and a display device 2 as an image display device such as a television receiver having a display unit 4 such as a liquid crystal display or a plasma display. And have. The DSC 1 and the display device 2 are connected by a USB cable 3. Instead of the display device 2, a projector device may be used as an image display device.

  The image display system transmits an image file stored in the DSC 1 and an image rotation instruction to the display device 2, and the display device 2 stores the image file and stores the image file in the display device 2. Are displayed on the display device 2 based on the operation of the DSC 1.

  FIG. 2 is a diagram showing a hardware configuration of the DSC 1 in FIG. The DSC 1 includes a central processing unit (CPU) 11 that executes a program, a flash memory 12 that stores the program, an I / O (Input / Output) port 13, and a system bus 14 that connects these. Have.

  In the I / O port 13 of the DSC 1, a CCD (Charge Coupled Device) 15 as an imaging device, a card reader 16 as an external memory connection device, a liquid crystal monitor 17 as a display device, and an input device 18 as input means. Are connected to a USB communication I / F (interface) 19 as a communication means.

  The card reader 16 has an insertion portion (not shown). A semiconductor memory 20 formed in a card shape can be inserted into the insertion portion. Examples of the semiconductor memory 20 formed in a card shape include a flash memory. The card reader 16 then irreversibly compresses the image data captured by the CCD 15 in the JPEG (Joint Photographic Experts Group) format into the semiconductor memory 20 inserted in the insertion unit and writes it as an image file 21. The data of the image file 21 is read out from the semiconductor memory 20 inserted into the.

  The USB communication I / F 19 has a USB connector (not shown). A USB cable 3 is connected to the USB connector. When a signal is input from the USB connector, the USB communication I / F 19 extracts data from the signal. The USB communication I / F 19 generates a signal based on the data to be transmitted, and outputs this signal to the USB connector.

  FIG. 3 is a diagram showing the stored contents of the flash memory 12 in FIG. FIG. 4 is a block diagram showing functions realized when saving an image in the image display system of FIG. FIG. 5 is a block diagram showing functions realized during image display in the image display system of FIG.

  As shown in FIG. 3, the flash memory 12 of the DSC 1 has a storage operation generation program 31, a display operation generation program 32, a rotation operation generation program 33, a PTP (Picture Transfer Protocol) communication program 34, and a USB still image. A class program 35 is stored.

  The storage operation generation program 31 is executed by the central processing unit 11 to realize a storage OP (operation) generation unit 41 shown in FIG. The save OP generation unit 41 generates a start storage operation (image save instruction) for saving the selected image file 21.

  The start storage operation includes the file name of the selected image file 21 or a file ID generated in a one-to-one correspondence with the file name. The start storage operation is generated as data in XML (extensible Markup Language) format. Therefore, in the start storage operation, the file name or file ID of the image file 21 is described in the start storage operation by being sandwiched between the tags indicating that they are information for specifying the file.

  The display operation generation program 32 is executed by the central processing unit 11 to realize a display OP (operation) generation unit 44 shown in FIG. 5 as display instruction generation means. The display OP generation unit 44 generates a start display operation (image output instruction) for displaying the image of the selected image file 57.

  The start display operation is data in XML format. The file name (or file ID) of the selected image file 57 is described in the start display operation by being sandwiched between tags indicating information for specifying the file.

  The rotation operation generation program 33 is executed by the central processing unit 11 to realize a rotation OP (operation) generation unit shown in FIG. 5 as a rotation instruction transmission unit. The rotation OP generation unit 45 generates a rotation operation (image rotation instruction) for rotating the displayed image.

  The rotation operation is data in XML format. The rotation instruction data is described in the rotation operation by being sandwiched between the tags indicating the rotation instruction. In this rotation operation, data indicating the direction of rotation (clockwise, counterclockwise) and angle (for example, 90 degrees, 180 degrees, 270 degrees, etc.) are inserted into the rotation operation with tags indicating them. Described.

  The PTP communication program 34 is executed by the central processing unit 11 to realize the PTP communication unit 42 shown in FIGS. 4 and 5. The PTP communication unit 42 transmits and receives the image file 21 and data (various operations and responses thereto) to and from the PTP communication unit 73 of the display device 2 described later.

  The USB still image class program 35 is executed by the central processing unit 11 to realize the USB still image class communication unit 43 shown in FIGS. 4 and 5. The USB still image class communication unit 43 transmits and receives data to and from the USB host.

  FIG. 6 is a diagram showing a hardware configuration of the display device 2 in FIG. The display device 2 includes a central processing unit 51, a memory 52 that the central processing unit 51 uses when executing a program, a flash memory 53 that stores the program, an I / O port 54, and a system bus that connects them. 55.

  The I / O port 54 of the display device 2 includes a storage unit 56 that stores an image file 57 and a metafile 81 associated with the image file, a storage unit 56 that serves as a rotation instruction storage unit, and a display device 58 that serves as a display unit. The USB communication I / F 59 as a communication means is connected.

  The USB communication I / F 59 of the display device 2 has the same function as the USB communication I / F 19 of the DSC 1 and will not be described. However, the USB communication I / F 59 of the display device 2 functions as a USB host, and the USB communication I / F 19 of the DSC 1 functions as a USB device.

  The display device 58 has the display unit 4 shown in FIG. When the display data is input, the display device 58 displays an image based on the display data on the display screen of the display unit 4.

  FIG. 7 is a diagram showing the storage contents of the flash memory 53 in FIG. The flash memory 53 of the display device 2 includes an operation interpretation program 61, a storage processing program 62, a list generation program 63, a decode program 64, a display output program 65, a rotation instruction output program 66, and a metafile generation program. 67, a metafile analysis program 68, a PTP communication program 69, and a USB still image class program 70 are stored. Hereinafter, these programs will be described with reference to FIGS. 4 and 5.

  The operation interpretation program 61 is executed by the central processing unit 51 to realize an OP (operation) interpretation unit 71 shown in FIGS. 4 and 5. When various operations described as XML format data are input, the OP interpretation unit 71 executes processing associated with the operations.

  The storage processing program 62 is executed by the central processing unit 51 to realize the storage processing unit 72 shown in FIG. The storage processing unit 72 acquires the designated image file 21 and stores it in the storage unit 56.

  The list generation program 63 is executed by the central processing unit 51 to realize the list generation unit 77 shown in FIG. The list generation unit 77 generates a list of file names (or file IDs) of the image file 57 stored in the storage unit 56.

  The decoding program 64 is executed by the central processing unit 51 to realize the decoder 75 shown in FIG. When the image data of the designated image file 57 is encoded (for example, in the case of JPEG or the like), the decoder 75 decodes the image data.

  The display output program 65 is executed by the central processing unit 51, thereby realizing the display output unit 76 shown in FIG. The display output unit 76 generates display data using the decoded image data.

  The rotation instruction output program 66 is executed by the central processing unit 51 to realize the rotation instruction output unit 78 shown in FIG. The rotation instruction output unit 78 outputs an image rotation instruction for rotating the image.

  The metafile generation program 67 is executed by the central processing unit 51 to realize the metafile generation unit 79 shown in FIG. The metafile generation unit 79 generates a metafile 81 and stores it in the storage unit 56.

  In the metafile 81 generated by the metafile generating unit 79, conditions for displaying the image of the image file 57, for example, conditions such as an image rotation instruction are described in association with the file name of the image file 57. .

  The metafile analysis program 68 is executed by the central processing unit 51 to realize the metafile analysis unit 80 shown in FIG. The metafile analysis unit 80 reads the metafile 81 stored in the storage unit 56 and outputs a rotation instruction based on the metafile 81.

  The PTP communication program 69 is executed by the central processing unit 51 to realize the PTP communication unit 73 shown in FIGS. 4 and 5. The USB still image class program 70 is executed by the central processing unit 51 to realize the USB still image class communication unit 74 shown in FIGS. 4 and 5. These have the same functions as those of the same name realized in the DSC 1 based on FIG. 3 and will not be described. However, the USB still image class communication unit 43 of the DSC 1 functions as a USB device, and the USB still image class communication unit 74 of the display device 2 functions as a USB host.

  Next, the operation of the image display system having the above configuration will be described. First, an operation for storing the image file 21 stored in the DSC 1 in the display device 2 will be described.

  FIG. 8 is a diagram showing a communication sequence between the DSC 1 and the display device 2 in FIG. 1 during image storage.

  At the time of image storage, the USB communication I / F 19 of the DSC 1 and the USB communication I / F 59 of the display device 2 are connected by the USB cable 3 as shown in FIG. In the DSC 1, a display OP generation unit 44, a PTP communication unit 42, and a USB still image class communication unit 43 are realized. In the display device 2, an OP interpretation unit 71, a storage processing unit 72, a PTP communication unit 73, and a USB still image class communication unit 74 are realized.

  As shown in FIG. 8, the USB communication I / F 59 of the display device 2 that functions as a USB host transmits a request for transmitting a USB descriptor to the USB communication I / F 19 of the DSC 1 that functions as a USB device (step S1). . The DSC 1 USB communication I / F 19 transmits the DSC 1 descriptor in response to the descriptor transmission request. The descriptor of DSC1 is transmitted to the USB communication I / F 59 of the display device 2 (step S2). The USB communication I / F 59 of the display device 2 generates a communication buffer called an endpoint based on the received descriptor of the DSC 1. This completes the USB configuration process.

  Next, a predetermined connection process based on PTP is executed between the PTP communication unit 73 of the display device 2 and the PTP communication unit 42 of the DSC 1 (step S3). Further, when a predetermined connection process is completed between the PTP communication unit 73 of the display device 2 and the PTP communication unit 42 of the DSC 1, a discovery process is executed between the display OP generation unit 44 and the OP interpretation unit 71 ( Step S4). Through this discovery process, the display device 2 and the DSC 1 recognize that each other is a device compatible with the same predetermined image display system. Note that the processing of steps S1 to S4 is executed only once when the DSC 1 and the display device 2 are connected by the cable 3.

  After the discovery process of the image display system is completed, the save OP generation unit 41 starts a save process for saving the image file 21 stored in the semiconductor memory 20 in the storage unit 56 of the display device 2.

  Specifically, the saved OP generation unit 41 reads the file name of the image file 21 stored in the semiconductor memory 20, and displays a list of this file name on the liquid crystal monitor 17 (step S5). Note that the save OP generation unit 41 may read the thumbnail images of the image file 21 stored in the semiconductor memory 20 and display a list of the thumbnail images on the liquid crystal monitor 17.

  The input device 18 outputs input data according to the key operation. The save OP generation unit 41 selects a predetermined image file 21 in the list as an image file 21 for saving based on input data input in a state where the list of file names is displayed on the liquid crystal monitor 17. (Step S5).

  When the image file 21 is selected, the saved OP generation unit 41 generates a start storage operation. This start storage operation includes the file name (or file ID) of the selected image file 21.

  Further, the saved OP generation unit 41 outputs the generated start storage operation to the PTP communication unit 42. When the start storage operation is input, the PTP communication unit 42 of the DSC 1 first determines whether the operation is an operation requesting transmission of the image file 21 (hereinafter referred to as an image file transmission request operation). to decide. The operation requesting transmission of the image file 21 is an operation requesting transmission of the image file 21 as a response.

  Since the start storage operation is not an operation related to transmission / reception of the image file 21, the PTP communication unit 42 of the DSC 1 outputs the start storage operation to the USB still image class communication unit 43 of the DSC 1 as transfer target data. The USB communication I / F 19 of the DSC 1 transmits the data output to the USB still image class communication unit 43 to the USB communication I / F 59 of the display device 2. The USB communication I / F 59 of the display device 2 outputs the received data to the PTP communication unit 73 of the display device 2 via the USB still image class communication unit 74 of the display device 2. Thereby, the start storage operation is transmitted from the PTP communication unit 42 of the DSC 1 to the PTP communication unit 73 of the display device 2 (step S7). Further, the PTP communication unit 73 of the display device 2 outputs the start storage operation received from the USB communication I / F 59 to the OP interpretation unit 71.

  When an operation is input from the PTP communication unit 73, the OP interpretation unit 71 executes a process associated with the operation. When the start storage operation is input, the OP interpretation unit 71 interprets that the start storage operation is a save instruction, and instructs the save processing unit 72 to perform a save process (step S8).

  Based on this storage processing instruction, the storage processing unit 72 starts the storage processing. Specifically, the storage processing unit 72 outputs an image file transmission request operation for acquiring the image file 21 having the file name (or file ID) included in the start storage operation to the PTP communication unit.

  When the image file transmission request operation is input, the PTP communication unit 73 of the display device 2 does not transmit the image file transmission request operation as data, but the designated file based on the image file transmission request operation. Acquisition of an image file 21 with a name (or file ID) is started.

  Specifically, the PTP communication unit 73 of the display device 2 uses the image file transmission request command defined by PTP, such as a get partial object or a get object command, to specify a specified file name (or file ID). An acquisition request command for the image file 21 is output. The image file transmission request command defined by the PTP is transmitted from the USB communication I / F 59 of the display device 2 to the USB communication I / F 19 of the DSC 1 (step S9). Further, the USB communication I / F 19 of the DSC 1 outputs the received image file transmission request command defined by the PTP to the PTP communication unit 42 of the DSC 1.

  When an image file transmission request command defined by this PTP is input, the PTP communication unit 42 of the DSC 1 creates the image file 21 corresponding to the file name (or file ID) specified by the acquisition request command as a semiconductor. Read from the memory 20. Then, the PTP communication unit 42 of the DSC 1 transmits the read image file 21 to the PTP communication unit 73 of the display device 2 (Step S10).

  When the PTP communication unit 73 of the display device 2 receives the predetermined image file 21 in response to the image file transmission request command defined by PTP, the PTP communication unit 73 outputs the received image file 21 to the storage processing unit 72.

  When the requested image file 21 is input from the PTP communication unit, the storage processing unit 72 stores the image file 21 in the storage unit 56. As a result, the same image file 21 stored in the semiconductor memory 20 of the DSC 1 is stored as the image file 57 in the storage unit 56 of the display device 2.

  Next, an operation for displaying the image file 57 stored in the display device 2 on the display device 2 based on the operation of the DSC 1 in the image display system will be described.

  FIG. 9 is a diagram showing a communication sequence between the DSC 1 and the display device 2 in FIG. 1 during image display. FIG. 10 is a flowchart showing the flow of display processing executed on the display device 2 based on the start display operation during image display.

  At the time of image display, as shown in FIG. 5, in the DSC 1, a display OP generation unit 44, a rotation OP generation unit 45, a PTP communication unit 42, and a USB still image class communication unit 43 are realized. In the display device 2, the OP interpretation unit 71, the list generation unit 77, the decoder 75, the display output unit 76, the rotation instruction output unit 78, the metafile generation unit 79, the metafile analysis unit 80, A PTP communication unit 73 and a USB still image class communication unit 74 are realized.

  First, the display OP generation unit 44 generates a list request operation. This list request operation is transmitted from the PTP communication unit 42 of the DSC 1 to the PTP communication unit 73 of the display device 2 via the USB communication I / F 19 of the DSC 1 and the USB communication I / F 59 of the display device 2. Is output to the OP interpretation unit 71 (step S21).

  When the list request operation is input, the OP interpretation unit 71 outputs a list generation instruction to the list generation unit 77. The list generation unit 77 generates a list of file names (or file IDs) of one or more image files 57 stored in the storage unit 56. The list generation unit 77 also outputs a list of file names (or file IDs) of the generated image file 57 to the PTP communication unit 73. The list of the image file 57 names is transmitted from the PTP communication unit 73 of the display device 2 to the PTP communication unit 42 of the DSC 1, and is output from the PTP communication unit 42 to the display OP generation unit 44 (step S22). The display OP generation unit 44 displays this list on the liquid crystal monitor 17 (step S23).

  Thereafter, the display OP generation unit 44 displays a predetermined image file 57 in the list based on input data input from the input device 18 in a state where the list of file names (or file IDs) is displayed on the liquid crystal monitor 17. Is selected as an image file 57 relating to image display (step S24). Further, when the image file 57 is selected, the display OP generation unit 44 generates a start display operation. This start display operation includes the file name (or file ID) of the selected image file 57.

  The start display operation is transmitted from the PTP communication unit 42 of the DSC 1 to the PTP communication unit 73 of the display device 2, and is output from the PTP communication unit to the OP interpretation unit 71 (step S25). When the start display operation is input, the OP interpretation unit 71 starts display processing (step S26).

  Specifically, as illustrated in FIG. 10, the OP interpretation unit 71 outputs a display instruction to the decoder 75 and the metafile analysis unit 80. Based on the display instruction from the OP interpretation unit 71, the decoder 75 first reads the image file 57 having the file name (or file ID) included in the start display operation from the storage unit 56. Then, the decoder 75 decodes the read image data of the image file 57 and outputs it to the display output unit 76 (step S31).

  Further, the metafile analysis unit 80 stores the metafile 81 associated with the image file 57 having the file name (or file ID) included in the start display operation based on the display instruction from the OP interpretation unit 71. It is determined whether it is stored in (Step S32). When the image file 57 stored in the storage unit 56 is displayed for the first time, the metafile 81 related to the image file 57 is not stored in the storage unit 56. In such a case, the metafile analysis unit 80 outputs a display processing instruction that does not include an image rotation instruction or the like.

  When the decoded image data is input from the decoder 75 and a display processing instruction is input from the metafile analysis unit 80, the display output unit 76 processes the image of the decoded image data based on the display processing instruction. Then, display data in which the processed image is assigned is generated. In the case of a display processing instruction that does not include an image rotation instruction or the like, the display output unit 76 keeps the decoded image data image as it is, and the image data image is displayed on the display unit 4 of the display device 58. Display data assigned so as to be displayed as large as possible without cutting the image is generated. The display device 58 displays an image based on this display data on the display unit 4 (step S33).

  FIG. 11 shows an example of a display screen in which an image 91 in which a person is imaged is displayed on the display unit 4 of FIG. 1 as it is, with the DSC 1 lying sideways (that is, with the longitudinal direction of the image in the horizontal direction). FIG. Thus, even if the image 91 captured with the DSC 1 sideways is displayed on the display device 2 as it is, the vertical direction of the subject of the image 91 coincides with the vertical direction of the display device 2. Therefore, even if it is displayed on the display device 2 as it is, it does not give the user a sense of incongruity.

  FIG. 12 shows an example of a display screen in which an image 92 obtained by capturing a person with the DSC 1 in the vertical direction (that is, with the longitudinal direction of the image in the vertical direction) is displayed as it is on the display unit 4 of the display device 2 in FIG. FIG. As described above, when the image 92 captured with the DSC 1 vertically is displayed on the display device 2 as it is, the upper side of the image 92 becomes the left side (or right side) of the display device 2. For this reason, if it is displayed on the display device 2 as it is, the user feels uncomfortable.

  Therefore, when the image 92 is displayed on the display device 2 as shown in FIG. 12, the user performs an operation to instruct the input device 18 of the DSC 1 to rotate the image. The rotation OP generation unit 45 generates a rotation operation based on input data instructing image rotation input from the input device 18. This rotation operation includes, for example, an instruction indicating the rotation direction and the rotation amount of the image.

  As shown in FIG. 9, the rotation operation is transmitted from the PTP communication unit 42 of the DSC 1 to the PTP communication unit 73 of the display device 2, and is output from the PTP communication unit to the OP interpretation unit 71 (step S27). When the rotation operation is input, the OP interpretation unit 71 starts rotation processing of the displayed image (step S28).

  Specifically, the OP interpretation unit 71 outputs a rotation instruction to the rotation instruction output unit 78. Based on the rotation instruction from the OP interpretation unit 71, the rotation instruction output unit 78 generates an image rotation instruction instructed by the rotation operation, and outputs the generated rotation instruction to the display output unit 76.

  When a rotation instruction is input from the rotation instruction output unit 78, the display output unit 76 rotates the image of the decoded image data by the direction and angle of the rotation instruction, and generates display data to which the rotated image is assigned. To do. Further, the display output unit 76 outputs newly generated display data to the display device 58. The display device 58 displays an image based on this display data on the display unit 4.

  13 is a diagram showing an example of a display screen displayed on the display unit 4 of the display device 2 in FIG. 1 by rotating the image 92 displayed in FIG. 12 by 90 degrees clockwise. In this way, the image 92 captured with the DSC 1 vertically is rotated and displayed on the display device 2, so that the vertical direction of the subject of the image 92 matches the vertical direction of the display device 2. Therefore, the user does not feel uncomfortable.

  The rotation instruction output unit 78 also outputs the generated rotation instruction to the metafile generation unit 79. The metafile generation unit 79 generates a metafile 81 including the rotation instruction, and stores the metafile 81 in the storage unit 56 in association with the image file 57 decoded by the decoder 75.

  When an image rotation instruction is issued in this way, a metafile 81 including the rotation instruction is generated in the storage unit 56. In the metafile 81, the rotation instruction is associated with the file name of the image file 57.

  The OP interpretation unit 71 outputs a display instruction to the metafile analysis unit 80 based on the start display operation. The metafile analysis unit 80 determines whether or not the metafile 81 corresponding to the image file 57 having the file name (or file ID) included in the start display operation is stored in the storage unit 56, and the metafile 81 is If there is (step S32 in FIG. 10), the metafile 81 is read (step S34 in FIG. 10), and a display processing instruction including a rotation instruction included in the metafile 81 is output (step S35 in FIG. 10). ). When the rotation instruction is input from the metafile analysis unit 80, the display output unit 76 rotates the image of the decoded image data based on the rotation instruction, and the rotated image is displayed. The assigned display data is generated (step S36 in FIG. 10).

  Therefore, after the image rotation instruction is given and the metafile 81 is stored in the storage unit 56, when the image of the image file 57 is redisplayed based on the start display operation, the rotation operation is not issued. The redisplayed image is displayed on the display unit 4 of the display device 2 in a rotated state.

  As described above, in the image display system according to the first embodiment, the image file 21 stored in the semiconductor memory 20 of the DSC 1 is stored in the display device 2 as the image file 57, and the image stored in the display device 2 is stored. The image of the file 57 can be displayed on the display unit 4. In addition, if an image rotation instruction is input in the DSC 1, the image can be rotated and displayed.

  In addition, in the image display system according to the first embodiment, the rotation instruction is stored as the metafile 81 in the storage unit 56 of the display device 2. Thereafter, when the image of the image file 57 is displayed again based on the start display operation, the rotation process is automatically executed. Therefore, when the image is displayed again on the display unit 4, the rotated image can be displayed without transmitting a rotation operation from the DSC 1.

  In the image display system according to the first embodiment, the image file 21 storing the image data compressed in the JPEG format is transmitted from the DSC 1 to the display device 2, and the image of the received image file 21 is received by the display device 2. The data is decoded, and the image of the decoded image data is rotated as necessary. On the other hand, when the image rotation process is executed on the DSC 1 side, the DSC 1 performs the rotation process after decoding the image data of the image file 21, and further converts the rotated image data into the JPEG format. It must be encoded again and sent as an image file. For this reason, when the image is rotated in the DSC 1, the image quality is deteriorated due to re-encoding of the image. On the other hand, in the image display system according to the first embodiment, such re-encoding processing of image data does not occur. Therefore, while maintaining the quality of the image captured by the DSC 1, the image at the time of capturing is high. Can be displayed in quality.

  In the first embodiment, the metafile generation unit 79 generates the metafile 81 based on the rotation instruction from the rotation instruction output unit 78. In addition, for example, the metafile generation unit 79 may generate the metafile 81 based on an instruction from the storage processing unit 72. By generating the metafile 81 based on the instruction from the storage processing unit 72 in this way, the metafile generation unit 79 stores information on the image file 57 to be stored in the storage unit 56, for example, a list of file names. The file 81 can be saved.

  In the first embodiment, the DSC 1 transmits a start display operation for displaying the image file 57 stored in the display device 2, and transmits a rotation operation for rotating the displayed image. Yes. In addition to this, for example, the DSC 1 transmits a start display operation for displaying the image file 21 stored in the semiconductor memory 20 of the DSC 1, thereby transmitting a rotation operation for rotating the displayed image. May be.

  In the first embodiment, the DSC 1 transmits the start display operation after transmitting the start storage operation. However, when the start display operation is executed, the same image file transfer as the start storage operation is automatically performed. May be performed. In that case, the image file is transferred from the DSC 1 to the display device 2 by an operation for display.

Embodiment 2. FIG.
Next, an image display system according to Embodiment 2 of the present invention will be described. In the following description of the second embodiment, in the case of having the same function as the component of the same name of the image display system of the first embodiment, the description of the configuration is omitted using the same reference numeral.

  The image display system transmits an image file stored in the DSC 1 and an image rotation instruction to the display device 2, and the display device 2 displays the received image file of the image file based on the operation of the DSC 1. Display on the device 2.

  FIG. 14 is a diagram illustrating the contents stored in the flash memory 12 of the DSC 1 according to the second embodiment. FIG. 15 is a block diagram illustrating functions implemented in the image display system according to the second embodiment.

  As shown in FIG. 14, the flash memory 12 of the DSC 1 stores a display operation generation program 101, a rotation operation generation program 102, a PTP communication program 34, and a USB still image class program 35.

  The display operation generation program 101 is executed by the central processing unit 11 to realize the display OP generation unit 111 shown in FIG. 15 as a display instruction generation unit. The display OP generation unit 111 generates a start display operation (image output instruction) for displaying the image of the selected image file 21 from the semiconductor memory 20.

  The rotation operation generation program 102 is executed by the central processing unit 11 to realize the rotation OP generation unit 112 shown in FIG. 15 as a rotation instruction transmission unit. The rotation OP generation unit 112 generates a rotation operation (image rotation instruction) for rotating the displayed image.

  15 and the other components shown in FIG. 16 are the same as those in the first embodiment.

  FIG. 16 is a diagram illustrating a hardware configuration of the display device 2 according to the second embodiment. The display device 2 includes a central processing unit 51, a memory 52, a flash memory 53, an I / O port 54, and a system bus 55. The I / O port 54 is connected with a display device 58 as display means and a USB communication I / F 59 as communication means.

  FIG. 17 is a diagram showing the stored contents of the flash memory 53 in FIG. The flash memory 53 of the display device 2 stores an operation interpretation program 61, a decode program 121, a display output program 65, a rotation instruction output program 66, a PTP communication program 69, and a USB still image class program 70. The Hereinafter, these programs will be described with reference to FIG.

  The decoding program 121 is executed by the central processing unit 51 to realize the decoder 131 shown in FIG. When the image data of the designated image file 21 is encoded (for example, in the case of JPEG or the like), the decoder 131 decodes the image data.

  15 and the other components shown in FIG. 17 are the same as those in the first embodiment.

  Next, the operation of the image display system having the above configuration will be described.

  FIG. 18 is a diagram showing a communication sequence between the DSC 1 and the display device 2. FIG. 19 is a flowchart illustrating processing executed by the display OP generation unit 111. FIG. 20 is a flowchart illustrating processing executed by the rotation OP generation unit 112.

  As shown in FIG. 15, the USB communication I / F 19 of the DSC 1 and the USB communication I / F 59 of the display device 2 are connected by the USB cable 3. In the DSC 1, a display OP generation unit 111, a rotation OP generation unit 112, a PTP communication unit 42, and a USB still image class communication unit 43 are realized. In the display device 2, an OP interpretation unit 71, a decoder 131, a display output unit 76, a rotation instruction output unit 78, a PTP communication unit 73, and a USB still image class communication unit 74 are realized.

  As shown in FIG. 18, the USB communication I / F 59 of the display device 2 that functions as a USB host transmits a request for transmitting a USB descriptor to the USB communication I / F 19 of the DSC 1 that functions as a USB device (step S51). . The DSC 1 USB communication I / F 19 transmits the DSC 1 descriptor in response to the descriptor transmission request. The descriptor of DSC1 is transmitted to the USB communication I / F 59 of the display device 2 (step S52). The USB communication I / F 59 of the display device 2 generates a communication buffer called an endpoint based on the received descriptor of the DSC 1. This completes the USB configuration process.

  Next, a predetermined connection process based on PTP is executed between the PTP communication unit 73 of the display device 2 and the PTP communication unit 42 of the DSC 1 (step S53). When a predetermined connection process is completed between the PTP communication unit 73 of the display device 2 and the PTP communication unit 42 of the DSC 1, a discovery process is executed between the display OP generation unit 111 and the OP interpretation unit 71 ( Step S54). Through this discovery process, the display device 2 and the DSC 1 recognize that each other is a device compatible with the same predetermined image display system.

  After the discovery process of the image display system is completed, the DSC 1 starts a display instruction process for displaying an image based on the image file 21 stored in the semiconductor memory 20 on the display device 2 (step S55).

  Specifically, as shown in FIG. 19, the display OP generation unit 111 reads the file name of the image file 21 stored in the semiconductor memory 20 and displays the list of file names on the liquid crystal monitor 17. The input device 18 outputs input data according to the key operation. The display OP generation unit 111 selects a predetermined image file 21 in the list as an image file 21 for display based on input data input in a state where the file name list is displayed on the liquid crystal monitor 17. (Step S71).

  After selecting the image file 21, the display OP generation unit 111 generates a start display operation (step S72). This start display operation includes the file name (or file ID) of the selected image file 21. Further, the display OP generation unit 111 transmits the generated start display operation to the OP interpretation unit 71 (step S56 in FIG. 18).

  When an operation is input from the PTP communication unit 73, the OP interpretation unit 71 executes a process associated with the operation. When the start display operation is input, the OP interpretation unit 71 interprets the start display operation as a display instruction and instructs the decoder 131 to perform a decoding process.

  Based on this display instruction, the decoder 131 starts the decoding process. Specifically, the decoder 131 outputs an image file transmission request operation for acquiring the image file 21 having the file name (or file ID) included in the start display operation to the PTP communication unit 73.

  When the image file transmission request operation is input, the PTP communication unit 73 of the display device 2 does not transmit the image file transmission request operation as data, but the designated file based on the image file transmission request operation. Acquisition of an image file 21 with a name (or file ID) is started. Specifically, the PTP communication unit 73 of the display device 2 transmits an image file transmission request command defined by PTP such as a get partial object or a get object command to the PTP communication unit 42 of the DSC 1 (step in FIG. 18). S57).

  When an image file transmission request command defined by this PTP is input, the PTP communication unit 42 of the DSC 1 creates the image file 21 corresponding to the file name (or file ID) specified by the acquisition request command as a semiconductor. Read from the memory 20. Then, the PTP communication unit 42 of the DSC 1 transmits the read image file 21 to the PTP communication unit 73 of the display device 2 (step S58 in FIG. 18).

  When the PTP communication unit 73 of the display device 2 receives the predetermined image file 21 in response to the image file transmission request command defined by PTP, the PTP communication unit 73 outputs the received image file 21 to the decoder 131. When the requested image file 21 is input from the PTP communication unit 73, the decoder 131 decodes the read image data of the image file 21 and outputs it to the display output unit 76. The display output unit 76 processes the image of the decoded image data based on a display processing instruction, and generates display data to which the processed image is assigned. The display device 58 displays an image based on the display data on the display unit 4 (step S59 in FIG. 18).

  Further, the display OP generation unit 111 of the DSC 1 transmits a start display operation for displaying the image of the image file 21 (step S72), and whether or not the metafile 113 related to the image file 21 is stored. (Step S73). When the metafile 113 related to the image file 21 is stored, the display OP generation unit 111 reads the rotation instruction associated with the image file 21 related to the display from the metafile 113, and the rotation instruction Is transmitted to the rotation OP generation unit 112. When a rotation instruction transmission instruction is input from the display OP generation unit 111, the rotation OP generation unit 112 transmits a rotation operation including the rotation instruction to the OP interpretation unit 71 of the display device 2 (step S74, FIG. 18). Step S60).

  In this case, based on an instruction from the OP interpretation unit 71, the rotation instruction output unit 78 outputs a rotation instruction to rotate the displayed image in a predetermined direction by a predetermined angle to the display output unit 76. Further, the display output unit 76 rotates the image of the image data input from the decoder 131 based on this rotation instruction, and the display device 58 displays the rotated image on the display unit 4 (FIG. 18). Step S61).

  When the metafile 113 of the image file to be displayed does not exist and the image is not displayed correctly, an operation for instructing rotation of the image is performed by the user. When the user performs an operation for instructing image rotation to the input device 18 of the DSC 1, as shown in FIG. 20, the rotation OP generation unit 112 receives input data for instructing image rotation input from the input device 18. (Step S81), a rotation operation is generated (Step S82). This rotation operation is transmitted from the PTP communication unit 42 of the DSC 1 to the PTP communication unit 73 of the display device 2, and is output from the PTP communication unit 73 to the OP interpretation unit 71 (step S60 in FIG. 18).

  The OP interpretation unit 71 outputs a rotation instruction to the rotation instruction output unit 78 based on this rotation operation. The rotation instruction output unit 78 outputs to the display output unit 76 a rotation instruction for rotating the displayed image in a predetermined direction by a predetermined angle. When a rotation instruction is input from the rotation instruction output unit 78, the display output unit 76 rotates the image of the image data input from the decoder 131 based on the rotation instruction, and displays the display data to which the rotated image is assigned. Generate. Further, the display output unit 76 outputs newly generated display data to the display device 58. The display device 58 displays an image based on the display data on the display unit 4 (step S61 in FIG. 18).

  While the display processing 2 is executed in the display device 2 as described above by the start display operation and the rotation operation based on the user operation, the rotation OP generation unit 112 of the DSC 1 performs the rotation based on the user operation as shown in FIG. When instructed, the metafile 113 storing the rotation instruction in association with the image file 21 is stored in the semiconductor memory 20 (step S83).

  Thereafter, when the rotation instruction associated with the image file 21 to be displayed is stored in the semiconductor memory 20 as the metafile 113, the rotation OP generation unit 112 of the DSC 1 performs a rotation operation based on the stored rotation instruction. Generate and send. The display device 2 rotates the image of the image file 21 displayed on the display device 58 based on this rotation operation.

  Therefore, after the image rotation instruction is given and the metafile 113 is stored in the semiconductor memory 20, when the image of the image file 21 is redisplayed based on the start display operation, the redisplayed image is automatically displayed. It is displayed on the display unit 4 of the display device 2 in a state of being rotated in the direction.

  As described above, the image display system according to the second embodiment can display the image of the image file 21 stored in the semiconductor memory 20 of the DSC 1 on the display unit 4 of the display device 2. In addition, if an image rotation instruction is input in the DSC 1, the image can be rotated and displayed.

  In addition, in the image display system according to the second embodiment, the rotation instruction is stored as the metafile 113 in the semiconductor memory 20 of the DSC 1. Thereafter, when the image of the image file 21 is displayed again based on the start display operation, the rotation process is automatically executed. Therefore, when the image is displayed again on the display unit 4, the rotated image can be displayed without performing an operation of rotating the image in the DSC 1.

  In the image display system according to the second embodiment, the image file 21 storing the image data compressed in the JPEG format is transmitted from the DSC 1 to the display device 2, and the image of the received image file 21 is received by the display device 2. The data is decoded, and the image of the decoded image data is rotated as necessary. On the other hand, when the image rotation process is executed on the DSC 1 side, the DSC 1 performs the rotation process after decoding the image data of the image file 21, and further converts the rotated image data into the JPEG format. It must be encoded again and sent as an image file. For this reason, when the image is rotated in the DSC 1, the image quality is deteriorated due to re-encoding of the image. On the other hand, in the image display system according to the second embodiment, such re-encoding processing of image data does not occur. Therefore, while maintaining the quality of the image captured by the DSC 1, the image at the time of capturing is high. Can be displayed in quality.

  Each of the embodiments described above is an example of a preferred embodiment of the present invention, but the present invention is not limited to these, and various modifications and changes can be made.

  For example, in each of the above-described embodiments, the start storage operation is transmitted from the DSC 1 to the display device 2, and the display device 2 reads and displays the image file 21 designated by the start storage operation. In addition to this, for example, the DSC 1 may spontaneously transmit the image file 21 to the display device 2, and the display device 2 may display the image file 21.

  In the above embodiments, the display device 2 displays the image of the image file 57 or rotates the displayed image based on the start display operation from the DSC 1. In addition to this, for example, an input device (operation unit) is provided in the display device 2 and a display OP generation unit as a re-display instruction unit is realized, and a display OP generation of the display device 2 is generated according to an operation on the input device. A start display operation may be generated by the unit, and an image of the image file 57 may be rotated and redisplayed based on the start display operation.

  In each of the above embodiments, an image of one image file is displayed on the display device 2. In addition to this, for example, the DSC 1 transmits a start display operation for designating the number of image files to be displayed at a time, and the display device 2 receives image data in which images of a plurality of image files are allocated based on the display conditions. The display device 58 may generate and display an image based on the image data.

  In each of the above-described embodiments, as a means for transmitting a start display operation, a rotation operation, and the like, an apparatus configured by a PTP communication unit, a USB still image class, and a USB communication I / F is used. In addition to this, for example, a device composed of a USB mass storage class in which a SCSI command is specified as a subclass and a USB communication I / F may be used as means for transmitting operations and the like. Furthermore, for example, as a means for transmitting an operation or the like, a device that uses a wireless communication path instead of a wired communication path such as a USB may be used.

  In each of the above-described embodiments, the image supply device and the image display device are described using the image display system configured by the DSC 1 and the display device 2 as an example. In addition, the image supply apparatus may be an information terminal such as a mobile phone or a PDA (Personal Digital Assistant).

  The present invention can be used, for example, in an image display system in which a digital still camera and a display device are directly connected and an image captured by the digital still camera is displayed on the display device.

It is a figure which shows the structure of the image display system which concerns on Embodiment 1 of this invention. It is a figure which shows the hardware constitutions of DSC in FIG. It is a figure which shows the memory content of the flash memory in FIG. It is a block diagram which shows the function at the time of the image preservation | save of the image display system of FIG. It is a block diagram which shows the function at the time of the image display of the image display system of FIG. It is a figure which shows the hardware constitutions of the display apparatus in FIG. It is a figure which shows the memory content of the flash memory in FIG. It is a figure which shows the communication sequence at the time of image preservation | save. It is a figure which shows the communication sequence at the time of an image display. It is a flowchart which shows the display process based on the display instruction | indication of an image. It is a figure which shows the example of a display screen of a landscape image. It is a figure which shows the example of a display screen of a vertically long image. It is a figure which shows the 3rd example of a display screen which rotated the vertically long screen of FIG. FIG. 11 is a diagram showing the contents stored in the flash memory of the DSC according to the second embodiment. FIG. 10 is a block diagram illustrating an implementation function of an image display system according to a second embodiment. 6 is a diagram illustrating a hardware configuration of a display device according to Embodiment 2. FIG. It is a figure which shows the memory content of the flash memory in FIG. It is a figure which shows the communication sequence between DSC and a display apparatus. It is a flowchart which shows the process which a display OP production | generation part performs. It is a flowchart which shows the process which a rotation OP production | generation part performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 DSC (image supply apparatus), 2 Display apparatus (image display apparatus), 19 USB communication I / F (transmission means), 20 Semiconductor memory (storage means), 21 Image file, 45 Rotation OP production | generation part (Rotation instruction transmission means) ), 56 storage unit (image file storage unit, rotation instruction storage unit), 58 display device (display unit), 59 USB communication I / F (reception unit), 76 display output unit (generation unit)

Claims (11)

Transmitting means for transmitting an image file to an image display device and displaying an image of the image file on the image display device;
A rotation instruction transmitting means for transmitting a rotation instruction for causing the image display apparatus to display an image obtained by rotating the image displayed on the image display apparatus;
An image supply apparatus comprising: Storage means for storing the rotation instruction;
In the case where a rotation instruction relating to an image file to be transmitted to the image display device is stored in the storage means, the transmission means outputs the rotation instruction stored in the storage means when the image file is transmitted. Sending to the display device and displaying the rotated image,
The image supply device according to claim 1. Receiving means for receiving an image file and a rotation instruction for rotating and displaying the image of the image file;
Display means for displaying an image of an image file;
Based on the reception of the image file, the image of the image file is displayed on the display means, and when the rotation instruction is received, an image obtained by rotating the image displayed on the display means is displayed on the display means. Generating means for displaying
An image display device comprising: Receiving means for receiving an image file and a rotation instruction for rotating and displaying the image of the image file;
Image file storage means for storing the received image file;
Display means for displaying an image of an image file;
An image of the image file stored in the image file storage means is displayed on the display means, and when the rotation instruction is received, an image obtained by rotating the image displayed on the display means is displayed on the display means. Generating means for
An image display device comprising: Rotation instruction storage means for storing the rotation instruction received by the receiving means;
In the case where the generation unit displays the image of the image file again on the display unit, and the rotation instruction for the image file is stored in the rotation instruction storage unit, the image obtained by rotating the image of the image file is displayed. Displaying on the means,
The image display device according to claim 3 or 4, characterized in that: Rotation instruction storage means for storing the rotation instruction received by the receiving means;
With an operation unit,
The generating means displays the image obtained by rotating the image of the image file when the rotation instruction storage means stores a rotation instruction for the image file when a predetermined operation is performed on the operation section. Displaying on the means,
The image display device according to claim 4. A decoding means for decoding the irreversibly compressed image data;
The receiving means receives an image file storing irreversibly compressed image data,
The generating unit displays an image of the image data obtained by decoding the image data of the image file received by the receiving unit by the decoding unit;
The image display device according to claim 3, wherein:   An image display system comprising the image supply device according to claim 1 and the image display device according to claim 3 or 4. Sending the image file to the image display device and displaying the image of the image file on the image display device;
Transmitting a rotation instruction for causing the image display device to display an image obtained by rotating the image displayed on the image display device;
An image supply method comprising: Receiving an image file;
Displaying the image of the received image file on a display means;
Receiving a rotation instruction for rotating and displaying the image of the image file displayed on the display means;
Receiving the rotation instruction, displaying the rotated image on the display means on the display means;
An image display method characterized by comprising: Receiving an image file;
Storing the received image file in an image file storage means;
Displaying the image of the image file stored in the image file storage means on the display means;
Receiving a rotation instruction for rotating and displaying the image of the image file displayed on the display means;
Receiving the rotation instruction, displaying the rotated image on the display means on the display means;
An image display method characterized by comprising:

Images