manipulating images with math

JordanW

Does anyone know of a program or a way with photoshop to manipulate images using math like you would in a pixel shader? I'm looking to manipulate big images with functions like POW and FRAC but I dont know how to do it without using a .cg shader in realtime.

Okt

This might be something to look into.

Adobe Pixel Bender Toolkit
http://labs.adobe.com/technologies/pixelbender/

Microneezia

Do you mean something like a fractal application?

how bout this: Apophysis application: freeware.

Funny enough there is no homepage that I can find, and you need to download tutorials from the Deviant Art group; Here are some links;

Files and Tutorials

Final Images from Apophysis artists.

its all done with math and aligning weird triangles I havent had enough time to get anything useful out of it, but im hopeful it will one day prove fruitful!

JordanW

Actually Okt posted pretty much exactly what I was looking for! I just installed it and this seems pretty awesome.

renderhjs

regarding Adobe Pixel Bender:
its supposed to compatble with the newest: Photoshop, After Effects and FLash CS4. Some methods however dont run on Flash because the flash player has not yet been ported completely to hardware acceleration so a smal amount of functionality is limited on the flash side.
Apart from that the most complete support so far is in After Effects

JordanW

Thought I'd drop back in and let you guys know how my experience went with Pixel Bender. It's pretty freakin awesome. It took me about half of today to learn how it worked and to make the photoshop filter I was wanting. It was fairly simple but there was no other program that already did it.

All my filter did was take one image and use it to mix 2 float values that are the exponent of a power on another image. The downside was PS only supports 1 image input so I had to break stuff into channels (which was fine cause I Was dealing with BnW images anyways).

renderhjs

got screenshots or pictures?

Brice Vandemoortele

I ran into that problem not so long ago. I ended up using maya cgfx.
Using a simple quad i used the uv coordinates as screen position (like i did for the normal reprojection shader i posted a few days back). It worked like a charm for me since i was doing a simple lookup texture. In your case you might need take a closer look at filtering states and such to be accurate to the pixel.

i've seen that pixel bender thingy, is it any good?