Color filter array
（重定向自Colour filter array）
![The Bayer color filter mosaic. Each two-by-two submosaic contains 2 green, 1 blue and 1 red filter, each covering one pixel sensor.](/Images/godic/202501/05/Bayer_pattern_on_sensor.svg1558.png")
In photography, a color filter array (CFA), or color filter mosaic (CFM), is a mosaic of tiny color filters placed over the pixel sensors of an image sensor to capture color information.
Color filters are needed because the typical photosensors detect light intensity with little or no wavelength specificity, and therefore cannot separate color information. Since sensors are made of semiconductors they obey solid-state physics.