Bayer Filter Array: A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosite (or photosensors). Its particular arrangement of color filters is used in most singleā€chip digital camera using a sensor array of millions of tiny pixels in order to produce the image. The camera shutter opens and closes, and then assesses how many photons fell into each photosite. The relative quantity of photons in each cavity are then sorted into various intensity levels, whose precision is determined by bit depth (0 - 255 for an 8-bit image). The filter pattern is 50% green, 25% red and 25% blue, hence is also called RGB.