[Sidefx-houdini-list] converting UV to XY in COPs

Edward Lam edward at sidefx.com
Wed Feb 27 20:36:32 EST 2008


On Wed, February 27, 2008 18:44, Jerry Corda-Stanley wrote:
> I'm taking a UV ramp image, then distorting it. Next I want to
> compare the uv values of non and distorted images and find out
> what the transform vector is for each pixel from the original
> image. Should be easy right? Anyone have any ideas. I'm all out.

If you don't know how the image is distorted, then it sounds like you're
looking for a way to compute the "optical flow" between the two images.
Unfortunately there's no function in COPs to do that, although I know that
other compositors do.

Cheers,
-Edward




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