Patent ID: 8200036

Claim:
A system for adjusting a sensitivity of a camera module, the system comprising: a memory unit configured for storing a plurality of pre-initialized pixel adjusting maps, each of the pixel adjusting maps comprising an input range and an output range corresponding to the input range; each input range of each input pixel adjusting map comprising a plurality of input values, each output range of each input pixel adjusting map comprising a plurality of output values; each output value of each pixel adjusting map corresponding to an input value, wherein the ratio of the input range of one pixel adjusting map to the input range of another pixel adjusting map is one third or one quarter; an image capturing unit configured for capturing an image from the camera module and acquiring pixel values of the image to determine a pixel value range of the pixel values of the image; a comparison unit configured for comparing the pixel value range with the input ranges of the pixel adjusting maps to determine which one of the input ranges of the adjusting maps most closely approximates the pixel value range of the image; and an adjusting unit configured for adjusting the pixel values of the image according to the pixel adjusting map whose input range most closely approximates the pixel value range of the image and outputting the adjusted pixel values.