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Lesson 5. Working with Filters and Masks > Working with Keying Filters

Working with Keying Filters

In the previous exercises, you worked with filters to add color and stylize objects in the Canvas. Other filters are used for more practical purposes.

The Keying filters are used to change an image area that is of uniform color or brightness into a transparent alpha channel based on the same shape as the selected area. For example, the TV weathercaster stands in front of a large green or blue screen to do a weather report. The green or blue background can be removed using Keying filters and replaced with the image of a computerized map.


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