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IMAGING GLOSSARY

Chroma-key (image processing)

An image blending function that replaces pixels of a specified hue range with pixels from a second image.

This is often referred to the weatherman effect because most weather forecasters use a solid blue or green background to make it look as if they are standing in front of a huge weather map.

It is important to remember that it is the hue that is used in the blending function and not the intensity or saturation.

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