Patent ID: 8243167

Claim:
An image sensor having an output of an integral image, comprising: a pixel circuit, comprising a plurality of pixels, for capturing pixel values of a plurality of pixels in an image; a line accumulator, coupled to the pixel circuit, for accumulating the pixel values of the pixels from a first pixel to a target pixel in a target pixel line of the image, so as to obtain an accumulated line pixel value; and a volume accumulator, coupled to the line accumulator, for adding the accumulated line pixel value output by the line accumulator to an integral pixel value of the pixel corresponding to the target pixel in a previous pixel line of the target pixel line, and using an adding result as the integral pixel value of the target pixel, so as to output the integral pixel value of the target pixel; a multiplexer, coupled to the pixel circuit and the volume accumulator, for outputting the pixel value or the integral pixel value of each of the pixels in the image; and a pre-processing unit, configured between the pixel circuit and the line accumulator, for performing a pre-processing to the pixel values of the pixels output by the pixel circuit.