Patent ID: 6614475
Filing Date: 2003-09-02
Classification: H04N

Abstract:
A correction apparatus for imaging signals comprising:average signal level detection means for detecting average signal levels of imaging signals obtained by an image pickup device; setting means for permitting a user to optionally set a plurality of correction levels associated with a plurality of the average signals levels; correction signal generating means for generating correction signals specifying correction levels, based on the information as set by said setting means, from the average signal level as detected by said average signal level detection means; wherein said correction signal generating means designate n coordinates (0,0), (X1, X2), (X2, Y2), . . . , including an origin coordinate (0,0) with the average signal level of 0 and a correction level of 0, where n is an integer, with n&gE;2, to express a correction level Y as a (nâˆ’1) order polynomial of the average signal level X passing through these coordinates, to generate correction signals based on said polynomial; and subtraction means for subtracting said correction signals from the imaging signals obtained by said image pickup device.