[Sidefx-houdini-list] cOPs: Accessing all frames in sequence at once?

zhang xiao zhangxiao6776 at gmail.com
Thu May 23 17:13:38 EDT 2013


another way might be sample the pixel on grid of points, and use solver sop
with vop sop to do the operation, might be faster


On Thu, May 23, 2013 at 11:39 AM, Andrew Lyons <tstexture at gmail.com> wrote:

> You could downrez the images and bring the pixels into CHOPS with an
> image CHOP over the specified time span. You can get min/max in two
> ways:
>
> - It's easy enough to do a min/max with an Envelope CHOP and a huge
> window value.
> - Alternately you can shuffle CHOP swap channels and samples and then
> look up the min and max chan values with a chop expression.
>
> Cheers
>
> On 22 May 2013 11:00, Craig Hoffman <craigleehoffman at aol.com> wrote:
> >
> > Is there any easy way to compare respective pixels from all the frames
> in a sequence of images?  I have a couple hundred frames and want to
> intelligently do operations across the entire sequence like
> min/max/average/etc.  There isn't a loop operator in COPs so is there any
> easy way to do something like this?
> >
> > Thanks,
> > Craig
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>
> --
> ===================================================
> Andrew D Lyons | Software Engineer | http://www.linkedin.com/in/tstex
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