Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[2.4.0] - 2023-12-20

Changed

Increased error diffusion dithering speed by ~50%
Reduced error diffusion dithering memory usage by ~70% (#13)

Fixed

Docs: the input does still need to be converted to grayscale for grayscale palettes, actually (#7)

[2.3.0] - 2022-12-20

Changed

When comparing colors, each channel is weighted according to human luminance perception (didder#14)

Fixed

Corrected Burkes matrix (#10)
Palette order no longer affects output (#9)
~~Grayscale palettes don't require the input image be converted to grayscale beforehand (#7)~~ (incorrect, see #7)

[2.2.0] - 2021-05-09

Added

Support for images with transparency (#8)

[2.1.1] - 2021-04-30

Changed

Update Bayer strength recommendations for color images

[2.1.0] - 2021-04-29

Added

JSON tags for OrdereredDitherMatrix

Changed

Dither never returns nil, making code simpler

Fixed

Bug where paletted images would never be detected as needing to be copied in Dither
Palette is actually fully copied when needed, before the colors were shared with passed slice
- NewDitherer
- Ditherer.GetColorPalette
- DitherPaletted and DitherPalettedConfig
- GetColorModel

[2.0.0] - 2021-02-13

Added

Added ErrorDiffusionStrength to set the strength of error diffusion dithering (#4)
RoundClamp function for making your own PixelMappers that round correctly

Changed

All linear RGB values are represented using uint16 instead of uint8 now, because 8-bits is not enough to accurately hold a linearized value. This is a breaking change, hence the new major version.

Fixed

Rounding is no longer biased, because ties are rounded to the nearest even number

[1.0.0] - 2021-02-11

Initial release.