I have a CRT projector that has come pretty ugly wear.
I want to compensate for that by modulating the video output to match the strength of the wear.
The problem is that I don’t know how to program a shader.
I basically want to take in a static texture the size of my video output and use that to modulate my output.
Like a final post process before the image is sent out to the PJ.
I think a simple multiply of the burn factor would work as I only want to darken the non burnt spots down to the level of the most burnt spot. Or a tradeoff within reason.
For the setup I figure a DSLR would work to capture the pattern and then use photoshop to align the image properly to the projected image.
Oh and it has to be RGB texture as the wear is different for each tube. Or at least one texture for each color.
Also in a related matter. Would it be possible to add a non linear gamma correction? Or even per pixel?
The important is the original problem though.
Unless it can’t be solved without further correction.