A while back I made a dithering app that is basically a GUI for the didder command line dithering tool. I went ahead and released it on GitHub, as I think it could be useful to more people than just myself. It currently runs on Windows and Linux. If anyone wants to help with Mac support, the GitHub page has more information. Here is a list of features:
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Supports all dithering algorithms provided by didder:
- Bayer dithering
- 2x2, 3x3, 3x5, 5x3, 4x4, 8x8, 16x16, 32x32, 64x64, custom size
- Ordered dithering
- Vertical5x3, Horizontal3x5, ClusteredDotVerticalLine, ClusteredDotHorizontalLine, ClusteredDot4x4, ClusteredDotSpiral5x5, ClusteredDot6x6, ClusteredDotDiagonal6x6, ClusteredDot8x8, ClusteredDotDiagonal8x8, ClusteredDotDiagonal16x16
- Error diffusion dithering
- Simple2D, FloydSteinberg, FalseFloydSteinberg, JarvisJudiceNinke, Atkinson, Stucki, Burkes, Sierra, TwoRowSierra, SierraLite, StevenPigeon
- Random noise dithering
- Bayer dithering
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Fine control over dither strength, image brightness, and image contrast with real-time updates in the preview window.
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Multiple ways to open files. You can drag a single image into the window, drag a folder into the window to load multiple images, or use a file browser to open one or more images (select multiple with ctrl or shift click).
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Dither many images at the same time, with the same settings.
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A toggle button to show the original image for making comparisons.