Patent ID: 8189086

Claim:
An image sensing apparatus comprising: a pixel array including a plurality of pixels arrayed in a row direction and a column direction; a selection unit, which selects a readout region in the pixel array; and a readout unit, which reads out a signal from the readout region selected by the selection unit, wherein, in a thinning-out readout, the readout unit reads out signals from a first readout region corresponding to an entirety of the pixel array at a first pixel density in a first frame period and reads out signals from a second readout region corresponding to a part of the pixel array at a second pixel density in a second frame period, the second pixel density being higher than the first pixel density, wherein all pixels in the first readout region whose signals are read out in the first frame period do not include pixels in the second readout region whose signals are read out in the second frame period, and, in the thinning-out readout, the selection unit causes the pixels in the first readout region to perform a charge accumulation operation for a first accumulation period and causes the pixels in the second readout region to perform the charge accumulation operation for a second accumulation period, a length of time of the second accumulation period being different from that of the first accumulation period.