Patent ID: 7680326

Claim:
An image processing method comprising: calculating a feature quantity of each of a plurality of picture frames, said plurality of picture frames constituting a moving image; calculating, by a processor of a computer, a temporary correction value for correcting picture quality of each of the plurality of picture frames from said picture frame; calculating a feature quantity of a temporarily corrected picture frame, which is obtained by correcting each of said picture frames with said temporary correction value; calculating a target feature quantity of said picture frame to which said temporarily corrected picture frame corresponds, said target feature quantity being obtained by adjusting the feature quantities of the temporarily corrected picture frames so that the feature quantities vary smoothly in a temporal direction; calculating an object correction value for each of said picture frames so that the feature quantity of each of the plurality of picture frames becomes approximately equal to said target feature quantity of said picture frame obtaining a corrected moving image using said object correction value, where in the temporary correction value (γo) is calculated using the equation: γo=Yd-Yo, wherein Yd is a target image density for each image and Yo is a mean value of image density for each image.