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Need a grid of 100 lines per inch |
Posted by: legswilly - 09-06-2021, 09:14 AM - Forum: General questions
- Replies (1)
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Hi, I need a Ronchi screen of 100 lines per inch. That is vertical lines of alternating black and no colour, the lines of which are 0.0025 inch wide. This would give 100 black lines per inch.
Could someone show how to do this, or even better, make a file that is for an A4 paper filled with the screen and I could get it printed on transparent film. I have a laser printer which I could try.
I would also post the file on a telescope maker, astronomy forum, if that is OK.
Please let there be a person that has pity on me.
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Automated batch xcf layer combining and png exporting |
Posted by: gimpler - 09-05-2021, 03:36 AM - Forum: Extending the GIMP
- Replies (6)
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Big favor to ask of you scripting/programming gurus. I have three directories full of Gimp XCF layers and need help automating the combining of them, and exporting the resulting images as PNGs.
I'm agnostic to what language(s) are used, as long it'll run on a mac, specs below.
So the idea is to sequentially loop through the three directories, load one respective XCF layer from each, and export the three-layer combination as a PNG in a 4th directory. The PNG filename could be a concatenation of the three XCF filenames used for each resultant image.
Directory structure looks like this:
ProjectName
Layer1Files (top layer)
A0.xcf
A1.xcf
A2.xcf
A3.xcf
A4.xcf
Layer2Files (middle layer)
B0.xcf
B1.xcf
B2.xcf
B3.xcf
B4.xcf
Layer3Files (background layer)
C0.xcf
C1.xcf
C2.xcf
C3.xcf
C4.xcf
CombinedPngs (to be created)
A0B0C0.png
A0B0C1.png
...
A0B0C4.png
A0B1C0.png
A0B1C1.png
etc.
And so forth until we get from A0B0C0.png all the way to A4B4C4.png.
Mac is running Catalina 10.15.7
Gimp 2.10.24 per the Mac binary download.
Python 2.7.16 per MacOS default. (Though I understand this version is obsolete.)
Bash 3.2 is accessible (though zsh 5.7.1 is the default).
Scheme I've see mentioned but know nothing about.
Same with Fu.
Happy to upgrade and/or install whatever's needed to get this done.
THANK YOU to anyone willing to help with this!
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Enhance Sharpen Does Not Work! |
Posted by: Mee - 09-04-2021, 05:13 PM - Forum: General questions
- Replies (1)
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Enhance sharpen does not work on a text field on Gimp 2.1.
On Gimp 2.8 you could use the enhance/sharpen in a text field or box??
I have tried this on Fedora and Debian.
On Xubuntu, Gimp 2.8 it works.
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New Layer: Black. Way to add this? |
Posted by: Asterra - 09-03-2021, 06:26 AM - Forum: General questions
- Replies (11)
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I'd say I need to add a new black layer about 75% of the time I'm adding a new layer. So it always struck me as a little odd that you get presented with several default options, but "black" isn't one of them.
All I'm after here is a way to add "black" as a default option so I don't have to sacrifice either my chosen foreground or background color to get it done.
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