Color channel

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The color channels are the primary colors of the color space used to store a digital color image , or the wavelengths in which the image was recorded.

The four basic colors of the CMYK color model, namely cyan, magenta, yellow and black

The color channel provides information about the color components contained in the image. The number of color channels in an image depends on the mode, i.e. there is one channel per color separation. Therefore, CMYK images have four color channels, RGB color images only three.

The four CMYK color channels of a photo


image editing

By appropriately blending or changing the intensity of individual color channels, digital images can be manipulated, improved and the contrast adapted to the requirements.

Science and environmental protection

The spectral range of infrared is important for environmental protection or remote sensing of the surface of the earth or planets . Multispectral scanners from satellites record the earth's surface in five or more color channels, at least two of which are in the infrared range. They are used to assess the state of health of the vegetation, but also to assess rocks and for geological investigations.