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

Andrew Lyons tstexture at gmail.com
Thu May 23 18:14:03 EDT 2013


True. Had another thought. Math chop allows you to combine channels using
max, min, average etc. Use after shuffle...
On May 23, 2013 2:13 PM, "zhang xiao" <zhangxiao6776 at gmail.com> wrote:

> 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
> > > _______________________________________________
> > > Sidefx-houdini-list mailing list
> > > Sidefx-houdini-list at sidefx.com
> > > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> >
> >
> >
> > --
> > ===================================================
> > Andrew D Lyons | Software Engineer | http://www.linkedin.com/in/tstex
> > ===================================================
> > _______________________________________________
> > Sidefx-houdini-list mailing list
> > Sidefx-houdini-list at sidefx.com
> > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> >
> _______________________________________________
> Sidefx-houdini-list mailing list
> Sidefx-houdini-list at sidefx.com
> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>



More information about the Sidefx-houdini-list mailing list