Dual Projection Edge Blending.

Alexander Mitchell's picture


Has anyone here worked out either a QC technique or CIFilter for a nice edge blending gradient? I have also been looking at Paul Bourkes fantastic work on this subject: http://paulbourke.net/texture_colour/edgeblend/

He advocates to use a 'Gamma' curve for the gradient... However I also believe that the overall image Gamma, (of the non-overlapping projected area) is to have a different gamma to compensate for the brighter black level caused by overlapping 2 projectors. (Light adds..)

I do know that MadMapper and a few other mapping softwares use this 'concept' as a bit of a draw card.

Be nice to do this in QC (and obviously build an app including this with QuartzBuilder!) without having to 'Syphon' it off all the time.

Cheers in advance... A

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harrisonpault's picture
Re: Dual Projection Edge Blending.

You may not have noticed, but your original citation of Paul Bourke includes a link to M. Oostrick's QC plugin for edge blending, also discussed on the Kineme site. I have worked with this, and would just mention that if your QC skills are basic, you will have to fiddle a bit with this to make it work with specific projector resolutions and overlaps. But the math and macro coding has all been done for you by M.O.

Alexander Mitchell's picture
Re: Dual Projection Edge Blending.

Sorry Guys! This was silly! Way to late at night,.. long day... :-( Speed reading!

Darn... what would we do without Paul??? (Think we should get him a nice gift!)