page_title: Grayscale
section_title: Grayscale as single channels of multichannel color images
hierarchical_section_title: Grayscale / Grayscale as single channels of multichannel color images
caption_attribution_description: English: Demonstration of how RGB image split into its three RGB channels. Tricolor, trichromacy, 3x grayscale
context_page_description: In digital photography, computer-generated imagery, and colorimetry, a grayscale or greyscale image is one in which the value of each pixel is a single sample representing only an amount of light; that is, it carries only intensity information. Grayscale images, a kind of black-and-white or gray monochrome, are composed exclusively of shades of gray. The contrast ranges from black at the weakest intensity to white at the strongest.
  Grayscale images are distinct from one-bit bi-tonal black-and-white images, which, in the context of computer imaging, are images with only two colors: black and white. Grayscale images have many shades of gray in between.
  Grayscale images can be the result of measuring the intensity of light at each pixel according to a particular weighted combination of frequencies, and in such cases they are monochromatic proper when only a single frequency is captured. The frequencies can in principle be from anywhere in the electromagnetic spectrum.
context_section_description: Color images are often built of several stacked color channels, each of them representing value levels of the given channel. For example, RGB images are composed of three independent channels for red, green and blue primary color components; CMYK images have four channels for cyan, magenta, yellow and black ink plates, etc.
  Here is an example of color channel splitting of a full RGB color image. The column at left shows the isolated color channels in natural colors, while at right there are their grayscale equivalences:
  The reverse is also possible: to build a full color image from their separate grayscale channels. By mangling channels, using offsets, rotating and other manipulations, artistic effects can be achieved instead of accurately reproducing the original image.
caption: Composition of RGB from 3 Grayscale images
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