Patent ID: 7463291

Claim:
An image data processing method comprising the steps of: storing image data of a screen into memory means, said image data having M lines and N pixels in each of said M lines; reading the image data from the memory means in a unit of block having K lines and L pixels in each of said K lines and processing the read image data in the unit of block; and when the image data is read in the unit of block having said K lines and said L pixels and the read image data is short of the unit of block, said M lines are divided by said K lines resulting in a first remainder and said N pixels are divided by said L pixels resulting in a second remainder, wherein a number of lines equal to half of said first remainder is added to an upper end of said image data and a lower end of said image data, and wherein a number of pixels equal to half of said second remainder is added to a left end of said image data and a right end of said image data; and compensating the read image data that is short of said unit block by repeatedly using the image data substantially the same number of times on both the upper end and the lower end of said image data.