Editing RGB color model (section)

===RGB and cameras===
[[File:Bayer pattern on sensor.svg|thumb|right|The [[Bayer filter]] arrangement of color filters on the pixel array of a digital image sensor]]

In color [[Professional video camera|television and video cameras]] manufactured before the 1990s, the incoming light was separated by [[Prism (optics)|prism]]s and filters into the three RGB primary colors feeding each color into a separate [[video camera tube]] (or ''pickup tube''). These tubes are a type of cathode-ray tube, not to be confused with that of CRT displays.

With the arrival of commercially viable [[charge-coupled device]] (CCD) technology in the 1980s, first, the pickup tubes were replaced with this kind of sensor. Later, higher scale integration electronics was applied (mainly by [[Sony]]), simplifying and even removing the intermediate optics, thereby reducing the size of home [[video camera]]s and eventually leading to the development of full [[camcorder]]s. Current [[webcam]]s and [[mobile phone]]s with cameras are the most miniaturized commercial forms of such technology.

Photographic [[digital camera]]s that use a [[CMOS]] or CCD [[image sensor]] often operate with some variation of the RGB model. In a [[Bayer filter]] arrangement, green is given twice as many detectors as red and blue (ratio 1:2:1) in order to achieve higher [[luminance]] resolution than [[chrominance]] resolution. The sensor has a grid of red, green, and blue detectors arranged so that the first row is RGRGRGRG, the next is GBGBGBGB, and that sequence is repeated in subsequent rows. For every channel, missing pixels are obtained by [[interpolation]] in the [[demosaicing]] process to build up the complete image. Also, other processes used to be applied in order to map the camera RGB measurements into a standard color space as sRGB.