A Bayer filter mosaic is a color filter array for arranging RGB color filters on a square grid of photosensors. Its particular arrangement of color filters is used in most single-chip digital image sensors used in digital cameras, camcorders, and scanners to create a color image.

What does Bayer filter do?

The Bayer filter, named for its inventor Bryce Bayer, is a microfilter overlay for image sensors that allows photosensors (which normally only record light intensity) to record light wavelength as well. The Bayer filter is the most common of such filters, and we find it in use in nearly all modern digital cameras.

Do all cameras use Bayer filter array?

Note: Not all digital cameras use a Bayer array, however this is by far the most common setup. For example, the Foveon sensor captures all three colors at each pixel location, whereas other sensors might capture four colors in a similar array: red, green, blue and emerald green.