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ramiro
11-04-2004, 01:04 PM
the following question is a bit academic...
the other day i had to remove all colour from a panning shot, except for some blood on a dead body. the surroundings were almost skin like coloured(tending towards yellow), the body didnt have any make-up and was a bit pinkish and there were a few people walking around. i started out by suppressing all colours except red(which i saturated a lot), then desaturated the whole image with a new brightness/contrast tool, but still, it was not completely black and white, since there were too many similarly coloured objects around(but not completely red). i ended up doing it with masks, it looked good but took some time to do it, so my question is, what other ways are to do such a thing?

Jayk2k
11-04-2004, 07:02 PM
I would have been tempted to desaturate the whole shot, and then key the blood, and layer it over top of the desat copy. This could then be further refined by using the boolean tool to subtract the max of green and blue channels from the red, to create more contrast for the key if needed.

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