ImageMagick / ImageMagick/ImageMagick
-quantize transparent setting doesn't work
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- Dominant language
- C
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Description
ImageMagick version
7.1.0-57
Operating system
Windows
Operating system, version and so on
Windows 11
Description
The "-quantize" color space setting of 'transparent' does not work.
Steps to Reproduce
magick alpha_gradient.png -quantize transparent +dither -colors 255 alpha_colors_255qt.png
Images
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the supplied magick alpha_gradient.png -quantize transparent +dither -colors 255 alpha_colors_255qt.png command on Windows 11 and compare its output with the described expectation. Trace the ImageMagick quantization path for the transparent color space, then verify that the generated alpha_colors_255qt.png handles transparency correctly without changing the other quantization behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- cli, computer-graphics
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100