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  <author_name>shuzo_kino</author_name>
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  <blog_title>Bye Bye Moore</blog_title>
  <blog_url>https://shuzo-kino.hateblo.jp/</blog_url>
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  <description>mask.pngという名前で白黒二階調の画像を用意 それでマスクするケース $ convert goal.jpg mask.png -alpha off -compose darken -composite -trim foobar.jpg更に閾値で色数減らして $ convert foobar.jpg -separate -threshold 50% -combine -format %c histogram:info: 885: ( 0, 0, 0) #000000 black 13: ( 0, 0,255) #0000FF blue 10: ( 0,255, 0) #00FF00 lim…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2022-06-15 23:58:13</published>
  <title>imagemagickでマスク処理し色抽出</title>
  <type>rich</type>
  <url>https://shuzo-kino.hateblo.jp/entry/2022/06/15/235813</url>
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