@Issabella,

Perhaps you might like to try the latest variation. I have modified the Picture to Line Art plug-in to include the option to set a paper-colour.
(Apologies to Tim for mutilating his script yet again!!!)

Attached is the script. Comments, suggestions and criticisms are most welcome!



Edit: The file is now updated to the latest version.
The changes:
1. If there is a pre-existing selection it is saved to a channel for future use.
2. Added the option to select an "ink" colour in addition to the "paper" colour.
3. The layers have been renamed, hopefully to something more meaningful.

Altering the opacity of any of the layers (except the base layer) can create a wide range of effects.

Thank you so much David. My comment; It's easier and practical your plug-in. Nice results.
Of course, Thanks Tin. I love this effect so much.
Thanks to both of you.

Very nice river view lineart Issabella.

Lyle and Issabella, Thank you for your nice comments

David, I too like your line art made from image IMG_5611

Thank you for the picture_to_line_art plugin. I tried the version you uploaded to post #271 with IMG_5611 but it made the first copy layer all black.

After comparing with an older version of the plugin I think it's caused by this line:
pdb.gimp_drawable_curves_spline(layer_copy, HISTOGRAM_VALUE, 6, [0, 0, 157, 110, 255, 255])

which was this in the older version that worked for me:
pdb.gimp_curves_spline(layer_copy, HISTOGRAM_VALUE, 6, [0, 0, 157, 110, 255, 255])

I took a guess and tried the following which gave a result like the old version:
pdb.gimp_drawable_curves_spline(layer_copy, HISTOGRAM_VALUE, 6, [0.0, 0.0, 0.615, 0.431, 1.0, 1.0])

I don't know why that is in my case when it's working for you and Issabella.

Sorry. I must clarify that I did my test with David's plug-in having previously removed Tim's. The two plug-ins were not together in my folder when I did my test.
Teapot, try to remove Tim's plug-in and leave David's to do your test.

@teapot,

Thanks for your valuable feedback. The reason for the difference, I believe, is that your colour selector is set to specify colours as floating-point numbers, whereas mine uses the range 0-255.

I am working on a solution, but don't hold your breath!!!

I also discovered that I had forgotten in the script to convert greyscale images to RGB, which results in the paper-colour not appearing. This will be corrected in the next revision.

@teapot,

Despite spending most of the day on this problem, I have not yet been able to come up with a solution!

I have attached my latest version which, at least, now works for greyscale images.



Edit: See #271 (above) for the latest version.

Two more photos - these are ones that I found difficult to achieve the result I wished for.

You got it! David. The green plant took relevance with the background. The little bird is nicer.
I post these tw more photos.
One, it is part of the facade of the Cathedral of my city.
Other one it's from the garden of a friend of mine.
Last one it is a result with David's plug-in ( I love it)

My plays on your last two photos, Issa.

...or

I like this plug-in, but it is not mine - the credit for it must go to Tim. I have made only small modifications.

Loving the lineart from everyone


Thank you for looking into this. I have just now asked for help here:
https://www.gimp-forum.net/Thread-gimp- ... ints-range

Went to Bermuda last year and used G'mic B/W pencil:

OK; got Impressionist plugin to work in GIMP again (have to, from time to time, edit the PSPI.ini file and hope it sticks). Thought I would use my Van Gogh present and then bumped up a notch via G'MIC and a few other things.

@teapot,

Thank you for your efforts in resolving this problem.

This morning I changed to your values - pdb.gimp_drawable_curves_spline(layer_copy, HISTOGRAM_VALUE, 6, [0.0, 0.0, 0.615, 0.431, 1.0, 1.0]) - the result was almost identical to the 255 based numbers. (Actually with your numbers the colour was slightly more intense. Perhaps from rounding errors in the conversion.)

If we can confirm that the floating-point values work for other people, I will change the plug-in.

@Issabella,
Could you please try the attached version of picture to line art and tell me if it works OK for you.

@teapot,
The attached version uses your values for the histogram, so it should work for you as it does for me.

If this script is OK for the three of us, I will follow it with a cleaned-up and extended version which I am testing today.



Edit: #271 of this thread updated to the latest version.

Congrats David. I see even better result, I think.
It works great for me. Paper ffff00 as you said.

Dinasset, David and Lyle, Thanks for your outcomes.
David, I have your last version. and the previous one

Issabella,

Many thanks for testing the plug-in.

Now we can have the new version which I have been testing:
1. It now has the option to change the colour of the ink as well as the paper.
2. I have renamed the layers, I hope, to something more meaningful.
3. If there is a selection in the original image, it is removed and saved to a channel.

Here is a silly example from the testing - green ink on blue paper!



And the new version.



Edit: #271 of this thread also updated to the latest version.