Patent ID: 8488897

Claim:
A method for image filtering, comprising: acquiring image data of a pixel dot of a current row to be filtered and a corresponding pixel dot of at least one adjacent row; obtaining a transparency value of the pixel dot of the current row and a transparency value of the pixel dot of the adjacent row; generating a filter coefficient of the pixel dot of the current row according to the following formula: coef ⁡ ( r , c ) = Alpha ⁡ ( r , c ) Alpha ⁡ ( r + 1 , c ) + Alpha ⁡ ( r , c ) , wherein the coef(r,c) is the filter coefficient of the pixel dot of the current row, the Alpha(r,c) is the transparency value of the pixel dot of the current row, and the Alpha(r+1,c) is the transparency value of the corresponding pixel dot of the adjacent row; and performing filtering processing on the pixel dot of the current row with the filter coefficient.