Patent ID: 6972771
Filing Date: 2005-12-06
Classification: G06F,G09G

Abstract:
1. In a computing environment, an image display system for permitting a portion of an image to be enlarged, said system comprising: image display means for displaying on a screen an image based on image data; region indicator means for identifying a region of the image to be enlarged; brightness adjusting means for adjusting brightness values of a portion of the image which corresponds to the region to be enlarged such that a contrast of the identified region when displayed within an enlarged display area on the screen is higher than a contrast of an original image within the enlarged display region, wherein said brightness adjusting means adjusts the values of brightness by changing each value of brightness using a function represented by a predetermined line on a graph where horizontal axis indicates values of brightness before change and a vertical axis indicates values of brightness after change, and wherein said predetermined line has a straight segment having a gradient equal to or greater than 1, said straight segment being obtained in such a manner that a function line having a gradient of 1 and causing no change in said values of brightness is rotated about a point on the function line corresponding to the midpoint of said values of brightness; and data modification means for modifying a portion of the image data which corresponds to the enlarged display area within the image data so that the identified region of the image, after enlargement within the enlarged display region is enlarged and displayed in the enlarged display region on the screen.