Patent ID: 8634003

Claim:
An image sensing apparatus comprising: an image sensor configured to convert an optical image of a subject into image signals by photoelectric conversion, the image sensor comprising a plurality of pixels two-dimensionally arranged, a vertical transfer unit for transferring, in a vertical direction, image signals from the plurality of pixels, and a horizontal transfer unit for transferring, in a horizontal direction, image signals transferred in the vertical direction from the vertical tranfer unit; a control unit configured to exercise control in such a way that information is acquired for estimating a magnitude of a dark current in the image sensor; any one of vertical linear noise correction processing, black subtraction processing, or normal readout processing in which neither the vertical linear noise correction processing or the black subtraction processing is carried out, is selected on the basis of the acquired information; and the vertical linear noise correction processing is carried out to correct a vertical linear noise in an image in the case of selecting the vertical linear noise correction processing, or the black subtraction processing is carried out to correct a vertical linear noise and a fixed pattern noise in an image in the case of selecting the black subtraction processing, wherein the control unit exercises control in such a way that a number of times high speed sweep is carried out for the vertical transfer unit is smaller in a case where the vertical linear noise correction processing is carried out than in a case where the black subtraction processing is carried out.