Correction of image sensor fixed-pattern noise (FPN) due to color filter pattern

摘要

Embodiments of an apparatus including a pixel array and a color filter array optically coupled to the pixel array, the color filter array including a plurality of tiled minimal repeating units. Processing circuitry is coupled to the pixel array to correct fixed pattern noise (FPN) in an image captured by the pixel array. The processing circuitry corrects the values of pixels that are part of a correction group, and wherein the corrections comprise a combination of a color ratio correction that is based on the ratios of selected colors within the minimal repeating unit, and one or more crosstalk corrections that are based on a chief ray angle (CRA) correction and the color ratio correction.

主权项

1. An apparatus comprising:
a pixel array; a color filter array optically coupled to the pixel array, the color filter array including a plurality of tiled minimal repeating units; processing circuitry coupled to the pixel array to correct fixed pattern noise (FPN) in an image captured by the pixel array, wherein the processing circuitry corrects values of pixels that are part of a correction group, and wherein the corrections comprise a combination of:
a color ratio correction that is based on the ratios of selected colors within each minimal repeating unit of the plurality of minimal repeating units, andone or more crosstalk corrections that are based on a chief ray angle (CRA) correction and the color ratio correction.