Channel Selection

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‌Channel Selection

Trackers can be set to look at only the red, green, blue, or luminance channels of the input imagery. (By default, all three channels are used.) Selecting a single channel may be useful in specific situations, such as when one channel has very high noise; you should use RGB in most circumstances until proven otherwise.

You can set the channel for each specific tracker, using the channel selection on the tracker control panel, or for all trackers by adjusting the channel selection on the Rez tab of the image preprocessor. The channel selector initially shows , which is the RGB setting.

Note that while an Alpha selection is shown on the tracker control panel's channel flyout, it is usable only by planar trackers. If you want to track the alpha channel

with non-planar trackers for some reason, you'll need to set that using the image preprocessor.

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