Patent ID: 6985615

Claim:
An image processing apparatus for performing a dynamic range compression processing to an arbitrary image to add a high frequency component obtained based on the image, the image processing apparatus comprising: gradation conversion means for performing gradation conversion on the image based on a gradation conversion curve; storage means for storing information concerning the gradation conversion curve; conversion means for converting a magnitude of an amplitude of the high frequency component based on information concerning the magnitude of the high frequency component and the information concerning the gradation conversion curve; and control means for controlling said gradation conversion means and said conversion means, wherein said control means controls to perform the gradation conversion based on the gradation conversion curve in said gradation conversion means after the high frequency component converted by said conversion means is added to the arbitrary image, or controls to add the high frequency component converted by said conversion means after the arbitrary image is subjected to the gradation conversion based on the gradation conversion curve by said gradation conversion means.