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Smile transparency
Posted by: dbuske - 10-01-2023, 07:42 PM - Forum: General questions - Replies (1)

How do I get the transparency of the background to show in Gimp.
I need to have the background transparent of a character to use in adventure game studio.
I don't understand how gimp does transparency and show the image with the background
transparency.

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  color and sharpness restoration on old photo
Posted by: Stephen Liu - 10-01-2023, 04:35 PM - Forum: General questions - Replies (12)

Hi all,

Please advise how to add more black color and increase the sharpness of the photo

Thanks

Regards



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  Scaling Image Quality
Posted by: zeuspaul - 10-01-2023, 07:37 AM - Forum: General questions - Replies (1)

If I scale an image I know I will lose some quality.  Assume I scale an image to 3x.  I find that I over scaled it and then rescale to 2x the original size.  What does Gimp use for the basis of the intermediate scale?  Is it scaling down from the lossy 3x image?  Or does it have the original image in memory and thus scaling 2x from the original image resulting in a better quality scaled image?

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  Cant's Follow User's Manual Instructions
Posted by: pastor - 10-01-2023, 12:00 AM - Forum: OSX - Replies (3)

Hi,
Please help, I can't follow some of the instructions in the user's manual. For example, You can add Brush-Pattern-Gradient icons and Active Image icon through Edit → Preferences → Toolbox

I can't find Preferences when I click on Edit on my MacOS Sonoma 14.0.  Please see the attachment.


Thanks very much for any help!



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  How to add a script
Posted by: Stephen Liu - 09-30-2023, 04:03 PM - Forum: General questions - Replies (3)

Hi all,

I have download advancedtonemapping-2.10.scm
(Advanced Tone Mapping)

Please advise where shall add this script file?

$ ls -al /etc/gimp/2.0/
total 96
drwxr-xr-x 2 root root  4096 Sep 30 23:04 .
drwxr-xr-x 3 root root  4096 Apr 20 18:56 ..
-rw-r--r-- 1 root root  2845 Feb  2  2022 controllerrc
-rw-r--r-- 1 root root 37934 Feb  2  2022 gimprc
-rw-r--r-- 1 root root   722 Feb  2  2022 gtkrc
-rw-r--r-- 1 root root   117 Feb  2  2022 menurc
-rw-r--r-- 1 root root  2778 Feb  2  2022 sessionrc
-rw-r--r-- 1 root root  9839 Feb  2  2022 templaterc
-rw-r--r-- 1 root root  6113 Feb  2  2022 toolrc
-rw-r--r-- 1 root root  1140 Feb  2  2022 unitrc

There is no script folder there.  Thanks

Regards

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  Select all transparency
Posted by: T-buch - 09-30-2023, 01:19 PM - Forum: General questions - Replies (4)

   
Knowing an EASY way of selecting all and only transparency areas (like 100% transparency but also e.g. 12% transparency)?

Please see the Attached Picture

BR
T-buch

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  How to restore old yellowed photo
Posted by: Stephen Liu - 09-29-2023, 10:40 PM - Forum: General questions - Replies (16)

Hi all,

I have old colour photos in yellowed color but without scratch. My PC is connected to a 4K display and running Ubuntu 22.04 desktop

Please advise;
1) How to remove the yellowed color.
2) How to restore their original color
3) How to increase their sharpness

Thanks in advance

Regards

sample photo attached



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  Pasting from Photoshop to Gimp
Posted by: petrifieddoublegulp - 09-28-2023, 10:53 PM - Forum: General questions - Replies (1)

Hi y'all,

I'm wondering if you could answer me a riddle.

I've been working with game textures recently, and doing most of my precision editing in photoshop, and then copying from photoshop and pasting into gimp when they're ready.

I had no trouble doing this with the color textures, I'd paste into gimp, export as .dds and bingo, all good. The game would reproduce the texture on the models just fine.

BUT, when I tried to do the same with the opacity layers, I'd paste into gimp, export as .dds making sure to generate mipmaps, and then all of a sudden the opacity layer was nowhere to be seen. When I edit the game's original opacity layer .dds in gimp itself without pasting from photoshop, the opacity layer is then recognized by the game.

So my question is how do I paste from photoshop into gimp, making sure that I am not bringing any errant data along for the ride that might confuse the way the game renders that layer? Is there something I'm missing?

Thanks

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Photo how to smooth edges?
Posted by: Sergey2004 - 09-28-2023, 06:44 AM - Forum: General questions - Replies (2)

how to smooth edges?



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  White Balance, Auto Input Level algorthms
Posted by: BrianLink - 09-25-2023, 06:20 PM - Forum: General questions - No Replies

I've poked around the source code but am having difficulties and am currently trying to figure out how white balance  / auto levels is performed. 

I think I was able to figure out gimp_operation_levels_map as the root for determining setting gamma but there is a bunch of contextual stuff I am missing.  

Example: I'm thinking gimp makes a copy of the xcf representation of the image and performs an update to that. Then there is a history of steps and one can jump back to an intermediate step.  

Via bimp, using some of the procedures out of pdb, i noticed that the intermediate steps are not necessarily saved and may be overwritten.  For example gimp-drawable-levels (to set gamma) followed by gimp-drawable-levels-stretch wipes out the levels gamma change whereas reverse order works.  And ditto for color-levels-gui. 

Anyway pointing me to something high level to get around the 15 levels of indirection used in gimp would help.

Thanks

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