All Questions
Tagged with image-processing gimp
14
questions
1
vote
0
answers
107
views
Color rotation/correction help request for GIMP
I'm new to GIMP and am looking for help on color rotation. Some target colors don't always seem to be accessible, or I don't understand how to get to it.
For example:
Here I can rotate the color from ...
- 111
0
votes
0
answers
59
views
GIMP Does Not Paint Consistently
I want to use the Paintbrush Tool in GIMP, but it does not apply paint in a consistent manner.
Often the paint is applied very lightly, sometimes even hard to notice, or not at all (no Undo option ...
- 123
0
votes
1
answer
293
views
Export multiple non-adjacent tiles with GIMP or ImageMagik or other tools
Tl;dr: looking for a tool or script that can export disjoint cookie-cutter squares from a larger image.
Imagine that you want a set of tiles on your kitchen wall that make up a larger image. To be ...
- 97
1
vote
0
answers
230
views
How to measure length (in pixels) between multiple points on an image [closed]
I have a fairly high resolution map, with a known scale. How to measure the length in pixels between multiple points on an image? Straight line is simple, but how to do it when there are multiple ...
- 111
3
votes
1
answer
3k
views
Gimp: opening clipboard as new image, with correct pixel size / dimensions?
I often find myself having a picture in my clipboard, and then I want to quickly edit that in Gimp.
So I ⌘+Tab to Gimp (using the latest Gimp on macOS Catalina) and do ⌘+N for New Image.
Problem: it ...
- 1,172
0
votes
0
answers
85
views
Given a printing of a monochrome bitmap image, how can I recover the bitmap?
I have a printout (scan, really) of what was originally a monochrome bitmap image. The pixels are clear enough that I can manually doodle in a reproduction of it in Paint or Gimp or some other image ...
- 755
1
vote
0
answers
48
views
GIMP/Imagemagick: Breaking single images into multiple images
I have pulled the image files from this Gregg Shorthand resource site with the intent of using the shorthand figures in Anki flashcards to complement my study of the system. You will note that the ...
- 251
2
votes
2
answers
2k
views
How can I enhance the gray text on scanned crumpled receipts?
Consider the following snippet of a receipt I've scanned:
usually when I scan receipts I manage to separate the text and the background using something like a color-range selection tool, selection ...
- 9,854
4
votes
3
answers
2k
views
How to achieve high-quality downscaling of diagrams (like in Firefox)?
I often need to downscale raster images consisting of thick straight lines and other thick curves, like this one:
.
Using GIMP 2.8.16 and its various interpolation options to resize the image to ...
- 855
6
votes
3
answers
49k
views
GIMP save PNG in 16 and 24 bit
I have a .png image which I need to save in 24 and 16bit using gimp. I went to Image -> Mode -> Indexed, but maximum value is 256 colors. I tried to paste in 16777216 colors for 24bit, but it did ...
- 63
7
votes
1
answer
17k
views
Windows: Batch processing images with GIMP and saving them to new files
On my windows machine, I want to use GIMP to modify all PNG files (filename.png) in the current directory and to save the output file to the sub-directory out/filename.png. The processing that is ...
- 208
58
votes
5
answers
75k
views
I want to change DPI with ImageMagick without changing the actual byte-size of the image data
In GIMP there is a very simple way to do what I want. I only have the German dialog installed but I’ll try to translate it. I’m talking about going to Picture -> PrintingSize and then adjusting the ...
- 736
118
votes
3
answers
120k
views
Using GIMP, what is the easiest way to repeat an image in a tiled fashion?
I have an image that is 100×125 pixels in size.
I'd like to create a new image by repeating the source image, five times, horizontally (so the new image is 500×125px).
The repetitions must be pixel ...
- 2,242
11
votes
4
answers
37k
views
How to get a good clean newspaper scan?
I tried a few times to scan newspaper articles, but the images I got were always blotchy and with bad colors, sort of like this:
Sometimes I see some really good scans, like this:
What is the trick ...
- 1,780