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Source: didder
Section: golang
Priority: optional
Maintainer: Debian Go Packaging Team <team+pkg-go@tracker.debian.org>
Uploaders: Nicolas Peugnet <nicolas@club1.fr>,
Rules-Requires-Root: no
Build-Depends: debhelper-compat (= 13),
dh-sequence-golang,
golang-any,
golang-github-disintegration-imaging-dev,
golang-github-makeworld-the-better-one-dither-dev,
golang-github-urfave-cli-v2-dev,
golang-golang-x-image-dev,
Testsuite: autopkgtest-pkg-go
Standards-Version: 4.7.0
Vcs-Browser: https://salsa.debian.org/go-team/packages/didder
Vcs-Git: https://salsa.debian.org/go-team/packages/didder.git
Homepage: https://github.com/makew0rld/didder
XS-Go-Import-Path: github.com/makeworld-the-better-one/didder
Package: didder
Section: graphics
Architecture: any
Depends: ${misc:Depends},
${shlibs:Depends},
Static-Built-Using: ${misc:Static-Built-Using}
Description: Extensive, fast, and accurate command-line image dithering tool
didder is an extensive, fast, and accurate command-line image dithering
tool. It is designed to work well for both power users as well as
pipeline scripting. It is backed by the author's dithering library
(https://github.com/makew0rld/dither), and is unique in its correctness
and variety of dithering algorithms. It provides many options, while
being correct (linearizing the image, weighting channels by luminance).
.
Types of dithering supported
.
* Random noise (in grayscale and RGB)
* Ordered Dithering
* Bayer matrix of any size (as long as dimensions are powers of two)
* Clustered-dot - many different preprogrammed matrices
* Some unusual horizontal or vertical line matrices
* Yours? You can provide your own ordered dithering matrix in JSON format
* Error diffusion dithering
* Simple 2D
* Floyd-Steinberg, False Floyd-Steinberg
* Jarvis-Judice-Ninke
* Atkinson
* Stucki
* Burkes
* Sierra/Sierra3, Sierra2, Sierra2-4A/Sierra-Lite
* Steven Pigeon (https://hbfs.wordpress.com/2013/12/31/dithering/)
* Yours? You can provide your own error diffusion matrix in JSON format
.
Features
.
* Set palette using RGB tuples, hex codes, number 0-255 (grayscale), or
SVG color names (https://www.w3.org/TR/SVG11/types.html#ColorKeywords)
* Optionally recolor image with a different palette after dithering
* Set dithering strength
* Image is automatically converted to grayscale if palette is grayscale
* Force image to grayscale with --grayscale
* Change image saturation, brightness, or contrast before dithering
* Read EXIF rotation tags by default (disabled with --no-exif-rotation)
* Downscale image before dithering, keeping aspect ratio
* Upscale image after dithering, without producing artifacts
* Supports input image of types JPEG, GIF (static), PNG, BMP, TIFF
* Output to PNG or GIF
* Process multiple images with one command
* Combine multiple images into an animated GIF
* Uses all CPU cores when possible
* Support images with transparency (alpha channel is kept the same)
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