Gray Pattern Script for GIMP

[Pat625]

TinTran.GrayPattern6.Standard.jpg # (340.27 KiB) Viewed 2258 times Thumbnail

TinTran.GrayPattern6.Standard.flowers.light effect.jpg # (155.72 KiB) Viewed 2258 times Thumbnail

TinTran.GrayPattern6.Standard Gray.StackedRocks.jpg # (290.11 KiB) Viewed 2258 times Thumbnail

TinTran.GrayPattern6.MultiCircles.Dandelion.jpg # (328.21 KiB) Viewed 2258 times Thumbnail

TinTran.GrayPattern6.Circles.Woman.Rocks.jpg # (246.19 KiB) Viewed 2258 times Thumbnail

TinTran.GrayPattern6.circles.Horses.jpg # (294.55 KiB) Viewed 2258 times Thumbnail

[Pat625]

TinTran.Gray.Standard.jpg # (227.07 KiB) Viewed 2238 times Thumbnail

[oldmangrumpy]

How did I miss this thread - Issabella, Pat and Gnerd, some very evocative imagery.

Done the downloads now to try out the filter!

[Pat625]

TinTran.GrayPatternStandard.Dolphin.jpg # (167.31 KiB) Viewed 2211 times Thumbnail

[Krikor]

This is a simple script that turns an image into a black and white image and fills it with predefined pattern.
[...]
Script Menu Location: Python-Fu/Gray Pattern...

Instructions:
1. Have an image opened with your active layer (image that you want to convert to Gray Pattern).
2. Run script (Python-Fu/Gray Pattern). Choose number of patterns (1-19). Then OK to run script.
3. Let the Magic happen and you'll get a retro black and white image of the image you want to convert.

Sample result (width 1200 seem to work best i think).
gray_pattern.png

Hi Tim,

I would like to test this script, but I have some doubts.

Does each version produce its own result?

I see that Version 2 allows Ipattern (diagonal) and Version 6 allows Circles.

Or would version 6 be an upgrade with all options from previous versions allowed?

As for the Patterns, would it be enough to install the Circle_Multi_patterns(m) only, or would it be necessary to download the other 3 available pattern options?

Thanks for any clarification!

[tim]

If you choose circles only then you can just download version 6 and the Multi-circles patterns.

[Krikor]

If you choose circles only then you can just download version 6 and the Multi-circles patterns.

Tim,
I tried to understand how the plugin uses the patterns to produce the final effect.

I noticed that in line 37 of the code are the threshold values ​​associated with each pattern.

In line 90 of the code the initials of the patterns are associated with the thresholds ("1" ("i" ?), "o", "m").

My assumption is that if I replace the original patterns with other patterns (but keeping the same name as the original pattern) I could customize the plugin.

For example, I would remove the I0, I25, ..., I229, I255.pat patterns. I would put other patterns but keep the same name.

But that wouldn't be a correct way since the .pat names are determined by their thresholds.

So I should find the correct threshold values ​​for my patterns and then make the appropriate change in the code (lines 37 to 40).

The whole point is that I don't know how the threshold values ​​were obtained for the .pat of the 4 types of patterns that the plugin uses.

That is, let's say I have a pre-defined pattern formed by 6 .pat, how do I get to the threshold values ​​of these specific .pat?

Thx Tim!

[tim]

you can add a custom pattern type to the end
like for example line 118
(PF_OPTION,"type", "Gray Pattern Type:", 0, ["Standard Gray Pattern","Diagonals","Circles","Circles Multi","Krikor"]),
then add below line 97
elif type == 4: #prepend the "k" in front of pattern.
pdb.gimp_context_set_pattern("k" + str(patterns[type][closest]))

then for line 37 - 40
you can add a 5 array like this to
patterns = [[0,10,20,35,45,56,71,81,91,99,107,117,132,147,165,183,206,229,255],
[0,25,51,76,102,127,153,178,204,229,255],
[0,54,94,126,156,183,205,223,236,247,252,255],
[0,54,64,78,94,117,135,143,158,174,182,198,215,230,244,255],
[0,10,20,30,40,50]
]
where the [0,10,20,30,40,50] can be any number in sequence representing your gray values (0-255) of filenames prepended with 'k'
there's a function named 'closest_index' in the code that will find the correct file names depending on gray values of the image.

[Krikor]

you can add a custom pattern type to the end
like for example line 118
(PF_OPTION,"type", "Gray Pattern Type:", 0, ["Standard Gray Pattern","Diagonals","Circles","Circles Multi","Krikor"]),
then add below line 97
elif type == 4: #prepend the "k" in front of pattern.
pdb.gimp_context_set_pattern("k" + str(patterns[type][closest]))

then for line 37 - 40
you can add a 5 array like this to
patterns = [[0,10,20,35,45,56,71,81,91,99,107,117,132,147,165,183,206,229,255],
[0,25,51,76,102,127,153,178,204,229,255],
[0,54,94,126,156,183,205,223,236,247,252,255],
[0,54,64,78,94,117,135,143,158,174,182,198,215,230,244,255],
[0,10,20,30,40,50]
]
where the [0,10,20,30,40,50] can be any number in sequence representing your gray values (0-255) of filenames prepended with 'k'
there's a function named 'closest_index' in the code that will find the correct file names depending on gray values of the image.

Okay, I'll try.
Thank you very much Tim!

[Krikor]

Tim, after making the recommended changes the plugin no longer appears in the menu.

At first I thought it could have been because I didn't use the value 0 (zero) for the lowest threshold of the patterns. In fact I tried to avoid it.
But even after adjusting the lowest initial value to 0 (zero) the plugin is still not displayed in the menu.

When Gimp is restarted the plugin loading is displayed, but it is not in the "Python-Fu" menu.

For information, I didn't use .pat for the patterns, I created them in .png. And the name of the files I didn't use the .pat prefix, I just used the letter k followed by the threshold value.
But I think that if that was the reason for the problem, the plugin would appear in the menu but accuse some kind of error, which is not the case.

Attached is the plugin with the changes you suggested. Maybe you could find what is causing this problem.

Thank you for your help!