Patent ID: 7692698

Claim:
A signal processing apparatus to be used for a solid-state image pickup element having a plurality of output systems adapted to output video signals obtained from pixels arranged in a column direction, the apparatus comprising: amendment means for amending an error value of each column in the video signals output from the solid-state image pickup element; temperature detection means for detecting a temperature; subtraction means for subtracting the error value amended by the amendment means for each column from the video signals output from the solid-state image pickup element; and error value computing means for shielding the solid-state image pickup element from light or irradiating light to the solid-state image pickup element at a constant rate, for computing a respective average value of each of a plurality of pixel signals obtained from the pixels in a predetermined region of the solid-state image pickup element, for subtracting the respective average value from a respective of the plurality of pixel signals obtained from the pixels of the solid-state image pickup element, and for accumulating values obtained by subtractions for respective columns, wherein the amendment means amends the error value corresponding to a column position of the video signals output from the solid-state image pickup element according to the temperature detected by the temperature detection means to produce an amended error value and supplies the amended error value to the subtraction means.