Derivative Diffusion by Rick Duim

Very nice filter with a lot of presets!!

I really like this filter, it's a lot faster than the old one.
I like the line size control which at lower settings makes an outline which seems to ad some punch.
I ran across something odd, it looks like barcode artifacts in the background.
I would like to keep the nice outline but loose the barcode.
Any thoughts?

Odd thing, though, it appears that an image created on my system does not match yours using the same parameters as listed. Here is one generated on my system (with the clipping fix).

All I can say is . It occurred to me that since the first couple of high pass-blurs were really just edge detection... derivatives came to mind. But since you only get one direction with one derivative... use two. It works! Different blending modes with the derivatives adds spice. Not a popular filter, though

Wow! This looks very good and very well, regetably I do not have time to try it but surely will do whenever I can.

Well done and thanks very much for making a filter with this very cool and interesting topic

Could go like at least 20 iterations before showing signs of something more life-like really.

Uberzev's more responsible for starting me up on the whole thing. haha. Would have not bothered to deal with it without seeing some example pictures first.

Wait how do you have "0.5" of a pass?

The set of operations is 1 iteration, so when you break out it's not an iteration anymore, it's a separate process. So technically you can't have 0.5 or something.

lol I'm extremely picky by the way. You'll notice me drill at some of the most trivial things from time to time.

i still love much this filter and gives a very good result with this reaction difussion patterns based on the source image, well done

It may be slow but this makes something that is not possible as far as I know in Photoshop, and is to make the reaction diffusion FOLLOW THE SHAPE and contour of the source image and that is the real beauty and amazing thing of this filter

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Rachel Duim wrote: Funny how damn slow this filter is... anytime I do reaction diffusion i use AppleScript to do it in Photoshop. It was an interesting experiment.

Sorry that I have no idea about scripting with AppleScript with Photoshop, but can you really make in AppleScript the same as it happens in this filter where the reaction difusión effect Is created from the source shape AND keeps correctly the contour of it ?

Searching for AppleScript effect I found this CNC software reaction diffusion that just found and not tested yet

AWESOME AND AMAZING ANIMATED REACTION DIFFUSION IN ADOBE AFTER EFFECTS

Alive tool for After effects Reaction Difussion tool

And in the behance page you can see even more

Alive tool in Behance

I still think that this is really an awesome and amazing filter.

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Rachel Duim wrote: The original is 4.5 iterative passes. I tried one with 12.5 passes, and one with 16.5.

After so much time, I am ashamed that I have missed a very important thing that I have just seen, and is HOW do you count the iterative passes?

I mean that there is not available a setting for the passes to be modified, and inside of the filter there is NO LOOP component, so please, can you be so kind to tell, HOW have you increased the passes to 12.5? It is 3 times the 4 passes plus the final 0.5 pass.

Do you multiply the original 4 passes 3 times so it makes 12? But HOW you do it?

Thanks very much for your possible help and sorry that I did not notice this before