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Extracting a "Dotted Netw...
Forum: General questions
Last Post: rich2005
10 hours ago
» Replies: 11
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How to correct Gimp save ...
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Last Post: Christophe.Maso@gmail.com
11 hours ago
» Replies: 2
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Rotating a layer against ...
Forum: General questions
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Yesterday, 03:03 PM
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Batcher and simple animat...
Forum: Tutorials and tips
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04-19-2026, 07:16 AM
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Background - Foreground -...
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04-16-2026, 04:28 PM
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2.10.38---Dock sizes and ...
Forum: Windows
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Scanner menu missing
Forum: General questions
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Smaller font size main me...
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GIMP 3.0 RC: Text Tool fo...
Forum: General questions
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Working with layers - a h...
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Last Post: sallyanne
04-11-2026, 01:26 PM
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  Rotating a layer against another leaves an unjustifiable white line
Posted by: NickPearl - Yesterday, 01:18 PM - Forum: General questions - Replies (1)

I need to reduce the inseam of somebody's shorts.
The technique that I have thought about that can do this is to rotate her legs. So, I rotate one leg and then I rotate another leg.
However, this process leaves an absolutely unjustifiable white line that cannot be fixed.

Here are the details:

The original picture is this:
https://i.imgur.com/XVLBbZ9.jpeg

I load it into GIMP by Ctrl+Shift+V.
Then I use the free-form select to select the area that I want to rotate.
Here is the selection:
https://i.imgur.com/U9t5siP.jpeg

Then:
Edit -> cut
Edit -> Paste as -> Paste as single layer in place
In the Layers window (bottom-right of the screen), I move the new layer below the main layer.
At this point, it looks like this:
https://i.imgur.com/cqcRJdA.jpeg

Then, In the Layers window (bottom-right of the screen), I select the main layer, and add alpha channel to it.
Then I select the fuzzy select tool. Then I click inside that white area.
Then I press the Delete button.

As a result of that, the leg becomes visible THROUGH the hole in the main layer.
It looks like this:
https://i.imgur.com/YketQ4c.jpeg

Then I rotate the Leg layer.
Here is the result:
https://i.imgur.com/DxZfbhu.jpeg

Then I merge all the layers.
Then I flatten the image.
Here is the final result:
https://i.imgur.com/SDNYibB.jpeg

As you can see, the two triangular white shapes are justifiable side effects of the rotation, and I can easily fix them.
However the white line is ABSOLUTELY NOT a justifiable side effect of the rotation, because the rotation rotates the back layer (the leg) towards and partially to the back of the main layer. So it shouldn't create an empty space (an empty line) between the two layers.

Also, please note that fixing that white line is not possible (or maybe not easy) because it is right next to the sewing line of the zipper. If I use the heal tool to remove the white line, the sewing line will also be removed, which is absolutely not acceptable.

1. Why does that white line happen?

   I really don't understand why this happens.
   Can you please shed some light on this issue?
   Please note that doing this same thing in other apps (for example Microsoft Paint) does NOT create that white line.

2. How can I avoid that white line?

3. If it is impossible to avoid it, how can I fix it?

Please help.
Thanks a lot for your help.
Nick P.

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  How to correct Gimp save error to file in Dropbox? folder
Posted by: Christophe.Maso@gmail.com - Yesterday, 12:22 AM - Forum: General questions - Replies (2)

Using Gimp 3.2, I'm able to create a new .xcf file in a Dropbox folder. However, if I make a change to the file and try to save it, I get this error message:

Quote:Saving 'D:\Dropbox\...\TestTest.xcf' failed:
Error writing 'D:\Dropbox\...\TestTest.xcf': Error renaming temporary file: Permission denied
As a workaround, I can save the file in that Dropbox folder under a new name (such as TestTest_2.xcf), but that gets cumbersome very quickly.
This error does not happen if I create the file in a non-Dropbox folder. In that case, I can make a change to the file and it saves just fine, so the problem seems to be with the interaction between Gimp and Dropbox.
I set the folder and file permissions in Windows 11 Explorer, but that had no effect. I get the same error message.

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  Extracting a "Dotted Network" skeleton from a glowing raster image for vector editing
Posted by: saint_m - 04-19-2026, 12:53 PM - Forum: General questions - Replies (11)

good day dearGIMP-Fans,  Smile


first of all - many thanks for your great forum. i am glad to be here - to be a part of your great forum.

today i have a workflow question: i am interested in the extracting a "Dotted Network" skeleton from a glowing raster image for vector editing

the goal: I have a complex raster image (a network of dots/lines on a dark background). I want to "isolate a layer" to get a rough, clean vector skeleton (Base Layer). Later, I will use this skeleton as a foundation to build upon (a Model Layer).

 my base question 1:the right tool Selection
 
Which is the best primary tool for this specific "extraction" step?

a) GIMP: (For curves/threshold) - i guess that this is the tool to use
b) Inkscape: (For bitmap tracing)
c) Krita: hmmm  (For color-to-alpha)

My assumption is to use GIMP to kill the background and Inkscape to trace the dots to vectors. Is there a way to do this purely in one software?

the question here: Isolation Technique
 How do I isolate only the brightest: lines/dots  (..without dragging the "bokeh" (blurry glow) along with them?).....
 - Is it better to work with Layers (e.g., subtracting a blurred layer)?
 - Or is Color Decompose (HSV - Value channel) the standard approach?
 - Are there specific filters (like "Edge Detect" or "Threshold") that preserve the dot structure without making them blobs?

the Question 3: The Vectorization:
 
When using Inkscape's Trace Bitmap, how do I prevent the scattered dots from merging together? The original image has distinct nodes, but the glow connects them. How do I tell the software to separate the "nodes" from the "edges"?

I want to keep this technology-neutral to learn all possible approaches, but I am guess that it best would be gained if i go with GIMP 
to get the workflows done.

look forward to hear from you
 Thanks!

saint_m Smile


-additional: some little & tiny ASCII Graphics that illustrates the "layer--stacking"  .  the"Layer Stacking" concept.

the Figure 1: The Base Extraction
my goal here:  i wanna remove the background glow, and keep the structure.

Quote:
Code:
    [Original Image: Glowing Dots + Dark BG]
                  |
                  v (Threshold & Decompose)
    +---------------------------------------+
    |  EXTRACTED BASE LAYER                 |
    |   .-----o      .-----o                |
    |   |      \    /         |             |
    |   o       o--o       o                |
    |  / \     /    \       / \             |
    | o   o---o      o---o                  |
    |                                 (White lines, Transparent BG) |
    +---------------------------------------+


Figure 2: The Model Layer (Your desired workspace)
the Goal: Lock the base, draw freely on top.





Code:
    +---------------------------------------+
    |  MY_NETWORK (Drawing Layer)           |
    |  (Here I add my new colors/shapes)    |
    +---------------------------------------+
    |  BASE (Reference Layer)               |
    |   .-----o      .-----o                |
    |   |      \    /         |             |
    |   o       o--o       o                |
    +---------------------------------------+
         (Locked, semi-transparent)

Again: what i  want is - the main goal: the Extracting of  a "Dotted Network" skeleton from a example image: " glowExtracting" a "Dotted Network" skeleton from a glowing raster image for vector editinging raster image for vector editing


look forward  to hear from  you 
greetings Smile



ps - see a example -in  this illustration we see many dods - the question - how can we isolate some of them ..!?
   

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  Batcher and simple animation.
Posted by: rich2005 - 04-18-2026, 11:31 AM - Forum: Tutorials and tips - Replies (2)

Looks like nobody is using Gimp anymore, it is all AI, however Gimp 3 can come in useful at times.

This is using the Gimp 3 plugin Batcher   https://kamilburda.github.io/batcher/

(1) Removing a plain color background from an animation.  It might be something downloaded from one of those animation websites. If it is possible using Color -> Color-to-Alpha then in Batcher these Gimp operations gimp-layer-add-alpha and color-to-alpha

   






(2) Distributing the layers across the canvas using the Gimp 3 Align tool and adding a background with Batcher.

   






Which gives this:

   

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  2.10.38---Dock sizes and movability
Posted by: IndiePubber - 04-14-2026, 08:27 AM - Forum: Windows - Replies (2)

Thinking it might have some features the earlier version doesn't have, yesterday I got the bright idea to upgrade my version of GIMP from 2.8-something to 2.10.38 (the latest I can get that's compatible with my Windows 7 ThinkPad).

I've spent the last few hours trying to make it look and perform the way 2.8 did. (Insert usual excuse about my being a creature of habit.) I've figured out/stumbled onto most of what I need, but one thing eludes me, or maybe two:

Unlike with 2.8, the Tool Options, Toolbox, Navigation pane, and Layers box each seem to be stuck in one place, at one size. They're way taller than they need to be, and take up way too much space. I really didn't mind moving them out of the way when I needed to work on a more zoomed-in view of my image, but I don't seem to have that option here.

Is there a way to resize them and move them around?

Also, when using the Rotation tool, its dialogue box was sitting right on top of the image I was rotating, so I couldn't really see what I was doing. It wouldn't move, either.

Please, I hope there is a way to do this. If not, I may need to revert and forego any improvements 2.10 has to offer.

Thanks!

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  Scanner menu missing
Posted by: SylDer - 04-14-2026, 07:40 AM - Forum: General questions - Replies (9)

Hello, the menu to create an image from a scanner is no longer available.
Is this temporary or an oversight?

Thank you.



Attached Files Thumbnail(s)
   
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  Smaller font size main menu after some time
Posted by: mmhmjanssen - 04-13-2026, 09:51 AM - Forum: General questions - No Replies

It already happened to me several times that the characters of the main menu, as well as the icons in the control / status bar, suddenly have become very small when I reactivate the program after some time. It happens when I leave VLC Media Player open for a couple of days, switching between hibernation / sleep mode and active mode numerous times during the day.

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Question How do I hide/unhide a *group* of dockable dialogs?
Posted by: Uityyy - 04-11-2026, 05:44 AM - Forum: General questions - Replies (1)

GIMP 3.0.4 has me feeling like a dunce tonight.

I have what I assume is a very, very common scenario, where I'm not finding the solution obvious:

- I am in single-window mode and want to hide all dockable dialogs on the right-hand-side of GIMP.
- I do NOT want to hide everything with <tab> because I still want to use the the toolbox and list of open files while having more space on the right.
- I do NOT want to close every docker on right individually and permanently because then I would have to open each one individually again when I wanted it.

What I am looking for is the equivalent of:
- The Show/hide properties option mapped to F8 by default in MuseScore
- The right-arrow button that collapses the sidebar in LibreOffice Writer
- Or simply resizing the right-hand panel to zero width if it didn't set a minimum width.

This is something I imagine pretty much everyone who has who has ever had GIMP tiled in one half of a single screen and reference materials tiled on the other half will have wanted to do at least once, so I would be shocked if in the entire 25+-year history of GIMP development no one has been bugged by this enough to implement a solution -- yet none of the familiar ones seem to be present. What am I missing?

Thanks,
Timothy Gaskell
GIMP user since way back when the only way to get to the main menu was to right-click the canvas -- but still not good at it.

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  apply a certain gradient color-sheme to a image:
Posted by: saint_m - 04-11-2026, 02:01 AM - Forum: General questions - Replies (4)

good day dear experts,  Smile


in this thread - i have learned alot:  i have seen, that there  were awesome color-shemes. 

the thread: c.f.  https://www.gimp-forum.net/Thread-color-...al-example

i (we all) have learned - that we can use wonderful color shemes - such as: LCH  - Lightness, Chroma, and Hue: 

Quote:LCH stands for Lightness, Chroma and Hue. It is pretty similar to HSL but is modelled after human vision. Oftentimes, it is referred to as HCL color mode.

HCL or LCH - however you may want to call it, provides a consistent lightness of colors as perceived by human eyes. I prefer this color mode as it enables us to generate gradients with consistent lightness. Here’s an example:

cf.  https://www.prasannamestha.com/blog/scie...-gradients


well - i want o apply this on a image: - see here a shematic view: 

Code:
colorize this from left to right - with  LCH
+---------------------------------------+
|  Base-plane                           |
|   .-----o      .-----o                |
|   |      \    /      |                |
|   o       o--o       o                |
|  / \     /    \     / \               |
| o   o---o      o---o   o              |
+---------------------------------------+
-.. how to apply the gradient from left  to right


the base plane: with  a network 

what is aimed: i want to colorize this from left to right - with LCH


should i do this with - some kind of layers - where i have the gradient of the LCH stored in!?


look forward to hear from you 

regard

Saint M Smile

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  Gimp 3.2.2 (and 3.0) text tool problems
Posted by: SteveBros - 04-10-2026, 08:09 PM - Forum: General questions - Replies (1)

I installed Gimp 3.2.2 and the text tool does not work (same problem in 3.0). When selecting a font, instead of selecting the font, it just displays my partial search string. Also, when I click on a text layer, the font size is changed to a seemingly random and large font size. After the text is changed I cannot undo it either! Any ideas? I think 2.10.38 is working okay. macOS Ventura.

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