rem 環境によって変えてね
set im=C:\Progra~1\ImageMagick-6.4.8-Q16
%im%\convert.exe sf.jpg -matte -channel rgba ( -size 200x200 gradient:#ffffffff-#00000000 -distort SRT 45 ) -compose dst_in -composite sample912a.png
rem 市松模様と重ね合わせ
%im%\convert.exe -size 200x200 pattern:CHECKERBOARD sample912a.png -composite sample912b.png
元画像(sf.jpg)
出力画像1(sample912a.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQiGfF4OudnFtRpVoduGsxz91R3mKEz0-1H8HqX9wVownBqyV0mVVbyJFPje2AFfPmhJQpDJ21qB_nQZ9elAOkjzYgU2lEC2ZN_pEES2azPY95QSKp8LYqn8oqBycfQWKZr2OR/s320/sample912a.png)
出力画像2(sample912b.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgy2JF4-crT2tL4uAvn9Ukws2NFfR6Ojp05Zj2IG1zJ-FR6OQBGio8_T987lm4S688uGBWEqvrwEFkGxjHcVGldWjZiRhrWKyPijPt16jHaOdqT-dDZfEtmOdKBH6iWmz_Y2eN2/s320/sample912b.png)
関連項目
ImageMagickとPHPで回転させた半透明グラデーションで画像を切り取る
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