Package: wnpp Severity: wishlist Owner: Nicolas Peugnet <nico...@club1.fr>
* Package name : didder Version : 1.3.0-1 Upstream Author : makeworld * URL : https://github.com/makeworld-the-better-one/didder * License : GPL-3.0 Programming Lang: Go Description : An 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/makeworld-the-better-one/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) This is a fine little CLI tool that is easy to use, and all of its dependencies are already packaged in Debian.
