Patent ID: 8081241

Claim:
A solid state image pickup device comprising: a plurality of photoreceiving elements which are two dimensionally arranged along rows and columns; a plurality of color filters including at least two colors, each arranged in correspondence with one of the plurality of photoreceiving elements; a plurality of signal lines to which the plurality of photoreceiving elements arranged in the direction along columns are connected, respectively; a first adding unit configured to add pixel signals from the photoreceiving elements for each of the columns in a row to obtain an addition signal for that row and to output the addition signal for that row, one row by one row; a second adding unit configured to add the addition signals of the rows to obtain an addition signal for rows and columns and to output the addition signal for rows and columns; an amplifier for amplifying the addition signal output from the second adding circuit; a first holding unit for holding an output signal from the amplifier under a state of resetting an input of the amplifier; a second holding unit for holding an output signal from the amplifier; and a differential processing circuit for outputting a difference between signals held by the first and second holding units.