# dssim を Homebrew, apk, zypper, winget でインストール

dssim のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:dssim
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install dssim
```

  証拠: local Homebrew formula metadata

### Linux

- apk (92%):

```sh
sudo apk add dssim
```

  証拠: Alpine Linux edge package indexes: dssim from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz

- zypper (92%):

```sh
sudo zypper install dssim
```

  証拠: openSUSE Tumbleweed package metadata: dssim from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst

### Windows

- winget (92%):

```sh
winget install --id Kornelski.DSSIM -e
```

  証拠: Windows Package Manager source index: Kornelski.DSSIM from https://cdn.winget.microsoft.com/cache/source.msix

## パッケージ情報

- **パッケージキー:** brew:dssim
- **パッケージマネージャ:** Homebrew
- **バージョン:** 3.4.0
- **ソース概要:** RGBA Structural Similarity Rust implementation
- **ホームページ:** <https://kornel.ski/dssim>
- **リポジトリ:** <https://github.com/kornelski/dssim>
- **最終更新:** 2026-06-15T10:20:15-04:00
- **生成日時:** 2026-08-03T19:37:03+00:00

## 実行可能ファイル

- dssim (エイリアス)

## インストール挙動

- Bottle: 利用不可

## バージョンと鮮度

- ページ生成日: 2026-08-03
- マネージャ版: 3.4.0
## プロジェクトの歴史と使われ方

dssim is Kornel Lesinski's image dissimilarity tool and library based on a variant of SSIM, returning a perceptual difference score for PNG and JPEG images.

### プロジェクトの歴史

The README frames dssim as an improved SSIM-derived metric for practical image-compression comparison: multi-scale comparison, linear-light RGB scaling, Lab color space, alpha support, color profiles, multicore execution, and C/Rust/WASM library use.

The release history shows an early 1.x Rust API era in 2015 and 2016, followed by a major Rust rewrite in 2.8.0 on 2017-11-10. That rewrite emphasized safer code, full-resolution chroma comparison, linear-light premultiplied-alpha scaling, and acknowledged PNG-only/color-profile limitations at the time. Later 3.x releases improved packaging, WASM compatibility, and performance.

### 採用の歴史

dssim is used by image codec and optimization developers who need a perceptual comparison metric rather than byte equality or plain RGB error. The README explicitly discusses comparing codecs either at equal file size or equal DSSIM score.

The tool is packaged by Homebrew, Alpine, openSUSE/zypper, and Windows winget; its README also mentions Homebrew and Ubuntu Snap availability. Homebrew analytics showed 187 installs over the preceding 365 days during this batch.

### 使われ方

Typical usage is `dssim original.png modified.png`, optionally comparing many modified images against one original or writing a visual difference image with `-o`. The README warns users to quote the dssim version because the score scale has changed between versions.

### パッケージ好きにとっての重要性

dssim is package-nerd significant because it packages an image-quality metric as both a CLI and reusable native/WASM library. It sits in the practical space between academic SSIM papers and real package-manager workflows for codec benchmarking, regression tests, and image optimization.

### タイムライン

- 2015-12-05: 1.2.0 introduced Rust API compatibility and improved sRGB gamma precision.
- 2016-05-09: 1.3.x releases were published with precision, stdin, gamma, and PNG-handling fixes.
- 2017-11-10: 2.8.0 was published as a major Rust rewrite.
- 2022-09-18: 3.2.3 was published with WASM compatibility and performance improvements.
- 2025-03-05: 3.4.0 was published with another performance improvement and is the Homebrew stable version recorded for this batch.

### Related projects

- SSIM is the underlying perceptual-similarity algorithm family linked from the README.
- TID2013 is the image-quality dataset used in the README's accuracy table.
- docs.rs hosts the Rust library documentation linked from the README.
- Image codec and compression benchmarking tools are natural neighbors because the README focuses on fair image-compression comparison.

### ソース

- <https://github.com/kornelski/dssim#readme>
- <https://github.com/kornelski/dssim/releases/tag/1.2.0>
- <https://github.com/kornelski/dssim/releases/tag/1.3.2>
- <https://github.com/kornelski/dssim/releases/tag/2.8.0>
- <https://github.com/kornelski/dssim/releases/tag/3.2.3>
- <https://github.com/kornelski/dssim/releases/tag/3.4.0>
- <https://formulae.brew.sh/formula/dssim>


## セキュリティノート

narrow executable package without higher-risk signals.

- **Geiger リスク:** グリーン / 低
- narrow executable package without higher-risk signals

## 他のパッケージマネージャ記録

- apk - dssim - 3.4.0-r0: normalized package name match | Alpine Linux edge package indexes: dssim from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | Tool for image similarity comparison, simulating human perception | https://kornel.ski/dssim
- zypper - dssim - 3.2.3-2.10: normalized package name match | openSUSE Tumbleweed package metadata: dssim from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | This tool computes (dis)similarity between two (or more) PNG images | https://kornel.ski/dssim
- winget - Kornelski.DSSIM: normalized package name match | Windows Package Manager source index: Kornelski.DSSIM from https://cdn.winget.microsoft.com/cache/source.msix


## Combined YAML source

View the package source record on GitHub. [combined/dssim.yml](https://github.com/mxcl/pkgdb/blob/main/combined/dssim.yml)


## ソース

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph