JP2009216833A5 - - Google Patents

Claims (18)

Image display control means for displaying an image in the display area of the display unit;
Input acquisition means for acquiring operation input from the user;
Frame line display control means for displaying a frame line having the same size as the display area on the image in a position corresponding to the operation input acquired by the input acquisition means;
Image request means for requesting the image transmission server for image data of a new image defined by a frame line shifted from the outer periphery of the image so as to include a part of the image displayed in the display area;
An image display device comprising: an image updating unit that displays a new image in the display area based on image data acquired as a response to the request.   The image display apparatus according to claim 1, wherein the image data is map image data including a map image. Further comprising request area determination means for determining a parameter for designating a new map image area defined by the frame line;
The image display device according to claim 2, wherein the image request unit requests the map image data based on the parameter.   The image display apparatus according to claim 1, wherein the input acquisition unit is an input device that instructs a direction. The input acquisition unit further includes an area determination unit that determines the position of the frame line as an image area to be requested as image data of a new image,
The image display apparatus according to claim 4, wherein the input device for instructing the direction is an input device for instructing an upward direction, a downward direction, a right direction, and a left direction. Further comprising setting information acquisition means for acquiring setting information that defines association between the operation input and the movement direction and movement amount of the frame line;
The frame line display control unit is configured to associate the operation input with the amount of movement of the frame line and to associate the operation input with the action specified in the setting information acquired by the setting information acquisition unit. The image display device according to claim 4, wherein a display position of the frame line on the image is determined based on the image display device.   The image display device according to claim 6, wherein the setting information acquisition unit acquires the setting information together with the image data. Image decoding means comprising a hardware decoder for decoding the image data acquired as a response to the request ,
Wherein the image updating means, before Symbol image display apparatus according to any one of claims 1 to 7, said image decoding means in the display area, characterized in that to display an image decoding. 9. The image display device according to claim 8, wherein the image decoded by the image decoding means is composed of image data generated as one image .   The image display device according to claim 9, wherein a size of the image data generated as the one image matches a size of a display area of the display unit.   A new image defined by the frame line displayed in the display area so as to include a part of the image displayed in the display area of the display unit of the image display apparatus from the image display apparatus, deviating from the outer periphery of the image Request acquisition means for receiving a request for image data of an image together with information for specifying a range of the new image;
  Based on the received request, image generation means for generating image data of an image having the same size as the display area of the image display device from the image data stored in the storage unit as one image;
  An image transmission server comprising: transmission means for transmitting the generated image data to the image display device.   The image transmission server according to claim 11, wherein the image data is map image data including a map image.   The request acquisition means further receives a parameter for designating a new map image area defined by a frame displayed in the display area of the image display device,
  The image transmission server according to claim 12, wherein the image generation unit generates map image data including a map image based on the parameter.   In order to allow the user to specify the new image, the image display device displays a frame line having the same size as the display area superimposed on the image, and the frame line is positioned according to an operation input from the user. Is to be moved to
  12. The transmission unit transmits setting information for defining a correspondence between the operation input and a movement direction and a movement amount of the frame line together with the image data generated by the image generation unit. 14. The image transmission server according to any one of items 1 to 13.   The image display device according to any one of claims 1 to 10,
  An image display system comprising: the image transmission server according to claim 11.   A display step of displaying an image in the display area in the display area of the display unit;
An input acquisition step for acquiring an operation input from the user;
  A frame line display step of displaying a frame line of the same size as the display area on the image in a position corresponding to the operation input acquired in the input acquisition step;
  An image requesting step of requesting image transmission server for image data of a new image defined by a frame line shifted from the outer periphery of the image so as to include a part of the image displayed in the display area;
  An image display method comprising: an image update step of displaying a new image in the display area based on image data acquired as a response to the request.   A program for operating at least one of the image display device according to any one of claims 1 to 10 and the image transmission server according to any one of claims 11 to 14, comprising: Program to function as each means.   A computer-readable recording medium on which the program according to claim 17 is recorded.