Patent ID: 8339476

Claim:
An image sensing apparatus comprising: an image sensor including a plurality of pixels; a control unit that, during an exposure operation that generates an image in the image sensor, reads out signals of a first portion of pixels among an entire frame of pixels from the image sensor by destructive read out, outputs an image based on the signals of the first portion of pixels to a display unit, after reading out signals of the first portion of pixels by destructive read out, reads out by destructive read out signals of a second portion of pixels different from the first portion of pixels, and outputs an image based on at least the read-out signals of the second portion of pixels to the display unit, after reading out signals of the second portion of pixels by destructive read out, reads out by destructive read out signals of a third portion of pixels different from the first and second portions of pixels, and outputs an image based on at least the read-out signals of the third portion of pixels to the display unit, and, when the exposure operation is completed, reads out signals of the entire frame of pixels including the first, second and third portions of pixels from the image sensor by destructive read out; and an image processing unit that generates an image by adding the signals of the first, second and third portions of pixels to signals of the entire frame of pixels for corresponding pixels.