Patent ID: 7456866

Claim:
A signal processing apparatus comprising: an image sensing device which has a plurality of photoelectric conversion elements covered with a color filter; a driver which drives said image sensing device in a first reading mode of separately reading signals from respective lines of photoelectric conversion elements and a second reading mode of reading all signals in one scan by adding signals generated by the lines of photoelectric conversion elements by at least two signals corresponding to the photoelectric conversion elements of a same color in every other line then outputting lines of the added signals, a color order of the added signals being the same as a color order of the signals before being added, in said second reading mode, a spatial distance between the barycenters of first and second lines, adjacent to each other, of the added signals being different from a spatial distance between barycenters of the second line and of a third line of the added signals that is adjacent to said second line; a switch that switches between the first reading mode and the second reading mode; and a correction unit that passes signals inputted from the image sensing device without correcting positions of barycenters of the inputted lines of signals when the first reading mode is set, and corrects positions of barycenters of the inputted lines of added signals so that the spatial distances between barycenters of the first to third lines becomes equal when the second reading mode is set.