[PD] mask videos
andres at geminiflux.com
Sat Dec 18 13:41:28 CET 2004
chris clepper wrote:
> Two things about [pix_coloralpha]: One, it does nothing on YUV data.
> Two, it just averages the R,G,B values, which really doesn't
> correspond to anything useful. In other words, drastically different
> colors will give the same mask, and the only really useful values are
> full white or black (the only unique ones when averaging).
That's right, [pix_coloralpha] is mostly useful to create a mask with a
black and white (greyscale) image.
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