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g4bri3lDev merged 1 commit into from
Jul 6, 2026
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chore: drop hand-written Unreleased changelog sections #54

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14 changes: 0 additions & 14 deletions packages/python/CHANGELOG.md
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Original file line number Diff line number Diff line change
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# Changelog

## Unreleased

### Bug Fixes

* Inherits the core dithering-correctness fixes: brightness-neutral ordered dither,
grayscale threshold scaling, auto tone-mapping clamps, and the perceptual
shadows/highlights pivot.
* Validate image dimensions and `accent_idx` at the FFI boundary, returning `ValueError`
instead of panicking the Rust extension on malformed input.

### Other

* Expose `tone_compress`, `gamut_compress`, and `rgb_to_oklab_buffer` on the `_rs` module
for tooling, and repair `scripts/pipeline.py` to the current API.
## [5.0.8](https://github.com/OpenDisplay/epaper-dithering/compare/epaper-dithering-v5.0.7...epaper-dithering-v5.0.8) (2026-07-06)


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2 changes: 1 addition & 1 deletion packages/python/Cargo.lock
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27 changes: 0 additions & 27 deletions packages/rust/core/CHANGELOG.md
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# Changelog

## Unreleased

### Bug Fixes

* **ordered dither:** use the standard zero-mean Bayer normalization `((v+0.5)/16 − 0.5)`.
The previous matrix had mean −1/32 and darkened every ordered-dithered image by ~8/255.
* **ordered dither:** scale the threshold amplitude to the palette's quantization step for
grayscale palettes (`1/(levels−1)`) so dense ramps (GRAYSCALE_16) are no longer swamped
by full-range dither noise; mono/color palettes are unchanged.
* **tone:** clamp the auto dynamic-range remap to `[0, 1]` so percentile outliers saturate
at the display black/white points instead of extrapolating past them (dark outliers were
crushed to pure black).
* **tone:** honor `strength` and preserve chroma for near-black pixels in the auto compressor;
clamp skewness before `powf` to avoid a NaN that could poison every output pixel on
high-key images.
* **tone:** pivot the shadows/highlights S-curve at perceptual mid-gray (gamma space) rather
than linear 0.5 (≈ sRGB 188), and clamp the strength inputs to `[0, 1]`.
* **types:** `ImageBuffer::new` now validates dimensions (panics on zero width / ragged
buffer) instead of silently truncating in release builds.

### Performance

* Fold the sRGB→XYZ→LMS conversion into Ottosson's single combined matrix (and matching
inverse), halving the per-pixel matrix work in OKLab conversion.
* **ordered dither:** precompute a per-threshold gamma LUT, removing three `powf` calls per
pixel (~13% faster); output is byte-identical.
* **gamut:** hoist the O(n²) palette-edge geometry out of the per-pixel loop.
## [4.0.1](https://github.com/OpenDisplay/epaper-dithering/compare/epaper-dithering-core-v4.0.0...epaper-dithering-core-v4.0.1) (2026-07-05)


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