How do you get GIMP to make one large image out of about 6,800 small (256x256 pixel) images? It's like you had one large picture and you cut it up into 6,800 little squares. I only have the little squares, not the original, and I want to put them together without any seams showing to make the large original image. They're numbered in sequence, they must stay in the exact sequence, and I already know exactly how many rows and columns the composite needs to have. If it's easier in some other program than GIMP that's fine too.

Hello,

First time here

Anyway, I thought it would be useful if I could tell GIMP to use current selection as area for setting guides.

There is an option called New guide from selection (Images -> Guides -> New guide from selection), but this just
puts 2 horizontal and 2 vertical guides along sides of selection.


What I had in mind was to use current rectangular selection (or bounding box of it) and then "divide" it into equal parts by
setting guides  (number settable by user), either horizontally, vertically, or both.

So for example, let's say I have some kind of object on my canvas, and it's already placed on the right spot. 
And maybe I want to do some work on the middle third. 

I could use measure tool, but this won't work without calculator.


Another option would be using rectangular selection and then setting Rule of thirds under tool options.
But choosing any tool after that results in "guides" vanishing inside of the selection, so you have to put guides
manually right after making that selection, if you don't want to loose them.

Also, if you need any number of divisions that's not already predefined (center, thirds, fifths...) this technique will not really work. 
It can be done, but it will definitely take lots of repetitive steps.

So I wrote a small plugin that does exactly what I had in mind.

It's not finished yet, but it works. 

So how do you use it? After placing it in plugin directory, it registers itself under
Image -> Guides -> Divide selection using guides

First you make a selection. It doesn't have to be rectangular, and if it's not it will use the bounding box of the selection
for calculation. After making a selection, choose Divide selection using guides (under Image -> Guides).
Enter the number of divisions you need, and that's it.

Now, maybe I'm re-discovering here something that's common knowledge among gimpers,
but even if that's the case, this was a good learning experience. The only problem is I'm
getting lots of GEGL related errors (GIMP 2.10.32), but from what I could read here, it's not my plugin's fault.

Attached Files

  g_divide_selection_using_guides.zip (Size: 725 bytes / Downloads: 368)

I had 64-bit 2.10.32 but started the update for 2.10.34.

I've tried several times, but each time when I get to the very end when the bar is full and it has installed or is installing twain.exe, it quits with the message "access denied" and then "setup is not complete. Please correct the problem and run Setup again."It doesn't tell me what the problem is, though.

The result of this is that the installer removed the old version of Gimp and now I don't have Gimp at all. I've never had this problem before.

I disabled my virus protection temporarily in case that interfered, but it didn't help. I tried re-installing the version I had before and I get the same error message.

I'm running Windows 10 22H2, fully up-to-date

Any suggestions?

How do you install the offline help in 2.8.0? I've spent to hours digging online and can't find any trace of instructions. The GIMP help pages just keep repeating over and over "Install the help file" and that's it. I downloaded it frolm

https://docs.gimp.org/download.html

When I try to fill the selection with the color of PP, the selection is colored gray. As you can see, the PP color is cyan, but the elliptical selection is colored in gray

How to edit the background image of gimp with red mark as per attached image. The border line between text to be adjusted . How to di this. Please help me. Thank you

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I recently switched from Linux Mint 19 to version 21. This (unfortunately) also meant saying goodbye to gimp 2.8. The new themes ("Dark","Gray","Light","System") from Gimp 2.10 are an impertinence. In addition, the font size in the Gimp menus is unacceptable. I work on two 4K monitors (34" and 32"), and gimp has always looked good after various updates over the last few years. How do you get acceptable settings that align with Gimp 2.8? I know there are some tweaks possible. One is

Hi forum!

I have a set of pictures (a few hundred) of a wild life camera where I got some artefacts when the sun was too strong. Is there any way I can batch process my pictures and get rid of those artefacts?

Attached some samples of how the artefacts look
Thanks for your help in advance!

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I've coded a conversion of RGB to LCH  & tried to use Gimp to verify my numbers. However, there are discrepencies which I don't understand. 
e.g. 
#0009be     RGB(0,9,190):     Gimp LCH (21.3, 102.9, 300.7)    My LCH (23.4, 105.1, 305.7)

The ColorMath Online Colour converter & Converting Colours Converter agree with me, give or take some minor rounding errors.
Is Gimp doing some sort of Out of Gamut compensation? (I'm guessing at this because I'm a beginner in this area).

I click on "m" to bring up the Move tool. But instead of bringing up the "plus" icon with the four arrow points, it brings up four thin lines (3, 6, 9 and 12 o'clock) with a space in the middle so they don't connect. It also has a small circle with a slash in it like you would see on a Do Not Enter sign on a freeway. It's to the right of the empty plus sign. Under that is a small dotted square.

I'm trying to make a collage, something I've successfully done in older versions of Gimp 2. I created a new image 2992 by 2992 pixels. I have two images, each 1496 by 2992 pixels. I created a layer that size and did an Open as Layers under the Files menu and selected the first of the two file. The file was placed on the left side of the new image as it should. I then tried a number of different things, none of which worked.

I opened the second file and selected/copied it into the new image, but it put the file in the center of the image, which would be no problem if the Move tool worked correctly.

I then tried creating a new layer, same size as before, but I was unable to see any border around a new layer. Everything was just as before. So, I then opened as layers the second file, and it put it in the center of the new image as before.

I then looked in the Gimp 2 user's manual under the "4.3.3. Summary of Move tool actions" to see if I could find any help there. It did mention that you need to press Ctrl and Alt keys if the object is a layer. So, I tried that, but again, no results.

Somehow, I reset the Tools to default (I don't recall how at the moment) to see if that would help. It didn't. I lastly uninstalled Gimp 2.10.34, re-downloaded it from the Gimp website and reinstalled it. Did all the above—same results.

I don't know if I adequately explained with the Move tool icon looks like, but that's the best I could do. Any help would be greatly appreciate. Thank you.

P.S. I was going to add a photo but it wouldn't let me—too large.