Patent ID: 9648265
Date: 2017-05-09
CPC Classifications: H04N

Claim:
1. A method of generating noise-corrected pixel values using an array of image sensor pixels and readout circuitry, wherein the array of image sensor pixels comprises a first group of pixels and a second group of pixels that is different from the first group of pixels, the method comprising: with the readout circuitry, obtaining a first set of pixel values from the first group of pixels; with the readout circuitry, obtaining a second set of pixel values from the second group of pixels; with the readout circuitry, generating a dithered correction value based on the second set of pixel values, wherein each pixel value in the second set of pixel values has a first bit width, and wherein generating the dithered correction value based on the second set of pixel values comprises performing precision extension operations on the second set of pixel values to generate an extended precision pixel value having a second bit width that is greater than the first bit width; and with the readout circuitry, subtracting the dithered correction value from the first set of pixel values to generate a noise-corrected pixel value.