imageworsener を Homebrew, Nix でインストール

プロジェクトリンク

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コマンドとエイリアス

• imagew

プロジェクトの歴史

ImageWorsener began in 2011 and reached public 0.9.0-era tags that year. The readme for version 1.3.5 lists copyright years 2011-2022, describes a command-line utility plus library, and records a licensing change from GPLv3+ in versions through 1.1.0 to an MIT-style license afterward.

The project developed around precise treatment of resampling, gamma correction, transparency, grayscale conversion, and high bit depth images. Its technical notes explicitly describe the program as a correctness-first tool that does not trade accuracy for speed, while also separating a core processing library from file-format I/O and the `imagew` command-line frontend.

採用の歴史

ImageWorsener's adoption has been modest but durable. It appears in Homebrew and Nix metadata and is packaged in other Unix-like ports systems, but its niche is less everyday image conversion and more users who care about resampling behavior, gamma correctness, and reproducible command-line processing.

The project site provides source archives and Windows binaries, while the GitHub repository offers source-control access. Homebrew analytics show sparse installs, which matches a specialized utility whose main value is fidelity and technical documentation rather than broad batch-conversion convenience.

使われ方

The `imagew` command reads an input file and writes an output file, with options for resizing, best-fit behavior, format selection, bit depth, dithering, posterization, grayscale conversion, background colors, and channel offsets. It supports regular files, standard input/output schemes, and Windows clipboard input for some builds.

The documentation emphasizes file-format support for PNG, JPEG, BMP, and WebP, with partial support for GIF, TIFF, MIFF, and Netpbm-family formats. The library API is intentionally lower level and less documented than the command.

パッケージ好きにとっての重要性

ImageWorsener is interesting to package nerds because it is the opposite of a convenience wrapper: a small C utility that prioritizes image-processing correctness and documents the tradeoffs. Its long technical notes make it a reference-like package for people comparing resampling behavior across ImageMagick, GraphicsMagick, and purpose-built tools.

タイムライン

• 2011: Early ImageWorsener tags and copyright history begin.
• 2011: Version 0.9.0 appears in the source repository.
• 2010s: The project accumulated technical essays on resampling, gamma, grayscale, alpha resizing, and filters.
• 2022: Version 1.3.5 was released with source archives and Windows binaries.
• 2026: Homebrew continues to package ImageWorsener as a niche image-processing utility.

Related projects

• The technical notes compare ImageWorsener's space with ImageMagick and GraphicsMagick, and cite resampling discussions such as Eric Brasseur's gamma article and VirtualDub's resampler article as inspirations. Its file-format support also depends on libraries such as libpng, zlib, libjpeg, and libwebp when enabled.

ソース

• https://entropymine.com/imageworsener/
• https://formulae.brew.sh/api/formula/imageworsener.json
• https://github.com/jsummers/imageworsener
• https://raw.githubusercontent.com/jsummers/imageworsener/master/readme.txt
• https://raw.githubusercontent.com/jsummers/imageworsener/master/technical.txt