Patent ID: 7684636

Claim:
An edge correction apparatus comprising: a high frequency extraction device for extracting a high-frequency signal not less than a predetermined frequency from an input signal output from an image sensing element; a suppression device for suppressing signal components according to a suppression level from the extracted high frequency pixel signals; a setting device for setting the suppression level used by said suppression device in correspondence with a signal level of each pixel in the input signal, a high-frequency emphasis device for emphasizing the high-frequency signal suppressed by said suppression device, wherein said setting device sets the suppression level in unit of a pixel on the basis of the noise characteristics of the image sensing element, in which the noise level increases as the input signal level increases, and wherein said setting devices sets the suppression level such that as the input signal level increases, the suppression level continuously increases with the amount of increase continuously becoming smaller, but not reaching zero, and wherein the high-frequency emphasis device outputs a signal comprising corrected edges.