Signal processing apparatus and signal processing method for solid-state image pickup element and image pickup apparatus

摘要

A column amplifier system C-MOS image sensor can reliably eliminate vertical stripe noises if there are variances in terms of operational linearity. The present invention provides a signal processing apparatus to be used for a solid-state image pickup element having in the inside thereof a plurality of output systems for outputting video signals obtained from pixels arranged in the column direction, the apparatus including an amendment unit that amends an error value of each column in the video signals output from the solid-state image pickup element, a subtraction unit that subtracts the error value amended by the amendment unit for each column from the video signals output from the solid-state image pickup element, and an error value computing unit that computes the error value of each column by conducting a process of shielding the solid-state image pickup element from light or irradiating light to the solid-state image pickup element at a constant rate, computes an average value of the pixel signals obtained from the pixels in a predetermined region of the solid-state image pickup element, subtracts the average value from the pixel signal obtained from each pixel of the solid-state image pickup element and accumulates the values obtained by the subtractions for respective columns in advance of an image pickup operation.