ImageMagick
#画像処理
#Tool
Official
https://www.imagemagick.org/script/index.php
https://www.imagemagick.org/script/command-line-processing.php
非公式日本語ドキュメント
http://imagemagick.rulez.jp/
https://gyazo.com/efc04ff7f7b0f2c6f2b7f4558ed2d8aa