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ImageMagickで文字画像作成

Last updated at Posted at 2014-04-18

ImageMagickで文字画像作成

大量のダミー画像が必要になった時とかにシェルスクリプトで回すと便利かもしれない。

要点

  • フォント指定する
  • captionで書くと適当に幅に合わせて改行してくれる
bash
convert \
  -size 640x854  \
  -background "#C0C0C0"  \
  -fill "#FFFF00"  \
  -font aquafont.ttf \
  caption:"サンプル\n改行も\nできます" \
  output.png

ちなみに、出力に標準出力を指定する事もできる。
その場合は、ファイル名の前にフォーマット指定が必要。

bash
convert \
  -font aquafont.ttf \
  caption:"てすと" \
  png:-

Data URI scheme で出力してみたり

bash
echo "data:image/png;base64,"$(convert -font aquafont.ttf caption:"てすと"  png:- | base64)
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