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August 29, 2015 14:00
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グレイスケールを作る but 白-黒ではなく白-透明の。
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| #!/bin/sh | |
| exec convert "$1" -alpha copy -channel alpha -negate +channel -fx '#FFF' "$2" |
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サムネイルだと効果はなく、実際に表示すると飯テロ画像になるような背景を作り出すために用いた。