Gefen Multiview EXT-HD-MVSL-441 User Manual page 38

Operating the 4x1 Multiview Seamless Switcher for HDMI Chapter
Because shadows and other lighting imperfections are always present when
photographing a subject against a solid color background, the background will
never be a pure RGB value (as shown below). For this reason, a color range with
minimum and maximum values needs to be specified.
RGB (124,150,201)
RGB (75,106,160)
7. Set the Min RGB values for the color to be "keyed".
8. Set the Max RGB values for the color to be "keyed".
9. The final composite will be displayed on Window A.
RGB (157,172,211)
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Video Effects