Questions tagged [image-manipulation]
The image-manipulation tag has no usage guidance.
32
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How to combine several semi-transparent images so that one covers another in GIMP?
I have several semi-transparent images which i want to place one over another.
But by default GIMP blends them, so the transparency of both images mixes. I only want so that the "upper" ...
2
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1
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Best ImageMagick parameters to upscale image containing text
What are the best ImageMagick parameters to upscale an image that contains text in Latin alphabet?
Take this image as example:
I did some experimenting, for example:
magick convert in.png -filter ...
- 421
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ImageMagick Mogrify Compress Images Recursively
Windows 10. ImageMagick v7.1.0-62
I need to compress and optimise a lot of .jpg images using ImageMagick. I am using the following command, which is working (this overwrites the original files which ...
- 231
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How do I properly downscale an image from 300 dpi down to 72 dpi using imagemagick?
As the title says, I want to know the proper way to downscale my image that is originally 300 dpi down to 72 dpi while still maintaining the same quality of the image.
By quality, I don't mean the ...
- 685
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Can I encode a PNG image losslessly to another format and decode it back into an identical file?
I am archiving roughly 150gb of PNG assets. In an effort to increase the compression ratio of the images, I am trying out FLIF (Free Lossless Image Format). This provides an excellent compression ...
- 139
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How to easily add text to a wallpaper on Linux
How can I easily add text and setup font parameters to a wallpaper on Linux ?
I've tried Shutter but it does not permit so enlarge the text to fill the wallpaper surface.
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mogrify - how do you recurse through subfolders in Windows
I thought there was a simple switch in mogrify command options that tells it go through subfolders as well. I didn't find any. On Linux, the "find" command seems to do the trick, how do you do this on ...
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ImageMagick convert: Placing text on a book cover
I am trying to make an eBook cover via ImageMagick, to be incorporated in a larger project after it works.
I want to get to geometry and gravity later, but at present I have two relevant images:
A ...
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3
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5k
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Trimming exterior empty space with ImageMagick does not work on scanned documents
Given an image that has some actual content inside and usually some unwanted white or black or transparency around that, I would like to trim or crop the exterior parts using ImageMagick.
The ...
- 208
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Fixing corrupt PNGs missing the IEND chunk
I have .png files outputted by a tool that converts .emfs to .pngs but that doesn't add the IEND chunk to the end.
Therefore, other tools, like ImageMagick, won't go near them as they detect them as ...
- 231
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How to geometrically transform an image using a matrix
How can I transform an image using a custom mathematical 2x2 matrix? To be clear, the math is not the issue; I already have the matrix I want. I just want to know how I can use software to apply the ...
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4
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Creating and splitting large multipage TIFF images
I need to both create and split multipage TIFF images, ranging from 2 to almost 100 pages (A4, 300 dpi, 2500×3500 px). The job is performed periodically by a script on an x64 Linux server. Currently I'...
- 248
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140
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Resize/crop multiple files while preserving certain areas?
I have 176 JPEG images that are 450x800 in size, and was wondering if there was a way to essentially resize them, but while preserving their content in certain areas (currently I'm only hoping for the ...
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Can I move layers one pixel at a time (using arrow keys for example) in GIMP?
Downloaded GIMP yesterday and been working with it for 6hrs or so. I am positioning many different layers in a way that makes them interact properly. By properly, I mean subject to my aesthetic tastes,...
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How to copy a selection from one image to another image in GIMP?
Recently I switched from Photoshop to GIMP. I want to copy a selection from one image to another, so that I can fill that selection with color in another image and I can get the shape without ...
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