Questions tagged [image-processing]
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41 questions
0 votes
1 answer
66 views
How to prevent image to get black background when converting from PDF using ImageMagick or Mogrify?
I'm trying to use an ImageMagick CLI command to convert multiple files from PDF to JPG format, but some images get a black background when the original file has a transparent background. I'm using the ...
0 votes
2 answers
246 views
Inkscape - Automating Trace Bitmap with Preset Parameters
I'm seeking guidance on automating the Trace Bitmap function in Inkscape. Specifically, I'm looking to preset parameters like color type, number of scans, and corner smoothing for the Trace Bitmap ...
3 votes
2 answers
608 views
How to achieve textured color gradients?
Some examples are below (source: https://www.etsy.com/shop/JazzberryBlue). How do I achieve gradients like this in Gimp? Or if not Gimp, what is the general process for creating gradients that blend ...
0 votes
1 answer
110 views
How can I resize pixel art to keep black pixels
An older 90s mac paint program implemented a black-and-white image scaling algorithm that for lack of a more precise description, "preferred the black pixels" over the white. A consequence ...
2 votes
2 answers
2k views
What filter is used on this image?
Can you please tell me what kind of filter is used on this image? Was this photo taken in black and white and then pinkish? And what is the easiest way to do this? (considering any program, like ...
0 votes
0 answers
262 views
Given a png monochrome line drawing, how to darken only lines that are a certain distance away from other lines?
I have a png image that I generated from a cad drawing using edge-detection. Only problem is all the lines have the same thickness. The lines that mark the main edges I need to be thicker and more ...
0 votes
0 answers
1k views
Photoshop: Image Processor and Batch not working with an action that work normally
here is the action here is the batch here is the image processor Image Processor and Batch is not working with an action that work normally. The batch just simply do the right actions, I can see ...
-2 votes
2 answers
315 views
How much more processing power does Adobe Photoshop use vs Gimp? [closed]
Gimp is not only free but is also lightweight and resources compared to Photoshop it feels like. Photoshop's long splash screen makes it feel resource heavy with alot of overhead. Is there technical ...
0 votes
1 answer
230 views
How can I perform non-uniform rectification/straightening of a scanned image?
I have a scanned image (let's assume 300 DPI and grayscale). It's a scanned page, on which the printing was perhaps not perfectly straight to being with, plus the scanning itself may have introduced ...
3 votes
1 answer
2k views
Extracting multiple photos out of single JPEG
I had a lot of old printed photos. To quickly scan them, I scanned them four at a time like this: (Above yellow color is actually a white color. I purposely put yellow color to distinguish from ...
1 vote
1 answer
97 views
Gimp: Derive necessary editing process from difference between original and processed image
I have the original image (left image below) and have received the processed version (center image below) of that image. I don't know which processing steps have been applied on the original image to ...
0 votes
1 answer
115 views
Can image processing produce image sequences to fake this specific 3D style?
This is more a question about what's possible with image processing and what not. I wonder if it's technically possible to generate fake 3D sprites with sharp pixels by using only pixel information ...
3 votes
1 answer
705 views
How to maintain lighting/shadows while making object transparent in GIMP?
Essentially I'm trying to make another background, beneath this image, become the colour of the object. The object/phone is red, the under-background is a linear gradient of colour and I'm trying to ...
0 votes
3 answers
228 views
How to blacken line of a drawing without loosing quality?
I have to make black pen-drawn lines of a scanned picture totally black without loosing line's smooth and quality (unfortunately, printing image original in grayscale leads to loose of quality of ...
1 vote
1 answer
241 views
How to simulate ink-on-paper texture/feeling in line diagrams I make
How can I turn crisp/clean diagrams I create on my computer, into diagrams that look like these: Notice how the lines are "coarse", they look like ink which has been soaked into grainy paper, they are ...