GIMP Version: 2.8.10
Operating System: Windows
GIMP Experience: Intermediate Level

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Greetings!

I've been using THE GIMP for a while now but I've just started scripting and have run into a problem. I get the message "Execution error for 'reaction diffusion': Error: ( : 1) =: argument 1 must be: number" when I try to run it.



As far as I can deduce, the script gets confused because the high-pass script that I'm using creates a new layer and deletes the original layer. How can I tell the script to work on the new layer after that point?

Additionally, I'd like to have the script loop the following four steps a user specified amount of times. If anyone could show me how to do that I would appreciate it!

Welcome to Gimp Chat z22,
We have a lot of very talented scriptors here so I think you will get lots of help with this issue for sure.

It's a script, found at the gimp plugin registry

registry(DOT)gimp(DOT)org/node/7385 (I can't yet post links D:)

You can post attachments until you have 5 posts then you can use the upload button to post links

@graechan:
Now you've got me confused! What is this "Contrast Adjust=0" ?!
There is no such option in Rob-A's "high-pass" scipt (at least not in the version at the Gimp Plugin Registry).
I think that line should read:

@z22:
To add user-specified number of iterations:

Thanks! Here's a little example of what the script can do now:

input:


output with 40 iterations:

@z22:
Now I'm even more confused!
Taking your .png and applying 40 iterations all I got was:

You must be doing something else to start this diffusion process.

I changed the parameters for the threshold a little bit and kept the high pass statement as:



I have no idea why this gets the results that I want it to but it does so I'm sticking with it. ;^D

Here's the updated code:

Looks like the version of this script from RobA does contains the Contrast Adjust argument:

http://www.silent9.com/blog/index.php?s ... 17&file=22

@z22:
Yeah, okay, I'm getting something a bit more promising now:

That's with threshold set to 127 .. has the right form for a diffusion now but with fuzzy edges (not surprisingly!). What are you doing to clean up the outline?

BTW the code should read:
if you're using Version 1.2 of Rob-A's high-pass script. Is it possible that you've actually got the old version somehow? Either that or the Script-Fu engine is simply taking your second zero as FALSE for the last parameter (Keep Original Layer?) and ignoring the extra value supplied.

@GnuTux
No, that's the OLD version! (Version 1.1). The version now at Gimp Plugin Registry is the current version (1.2). The Contrast parameter was TAKEN OUT in Version 1.2 as no longer required.
The change record in the script says:

by Graechan

(high-pass image layer 48 0 0 FALSE)
(set! layer (car (gimp-image-get-active-layer image)))

z22, if you replace the above two lines in your script with the following code then your script will not be dependent upon the high-pass script.

@Saulgoode:
Yes, that produces the same results. (I hadn't realised that was all Rob-A's script was doing for the "Colour" option.)

@z22:
I've also made the Threshold a user-specified parameter since the outcome is very dependent on that setting and the optimal value varies from one image to another.
Here's the updated script if you want it (don't want to steal your baby...)

Thanks for all the help everyone. Nice community you've got here

Wonderful filter.
I love the results on just images.

Original


Ran with these values. Your defaults.I added the other slider which was just me playing around with the code a bit.


Results after running filter and moving an original image copy to the bottom of the layer sack. Now set the top defused layer to overlay.

Ah, I see that's not RobA's version. Someone else modified his script, thus the confusion.