title: ImageMagick's convert: no images defined
body: <p>I tried to execute following command:</p>
  <pre><code>$ convert 1.png -filter 'Jinc ( +clone -negate -morphology Distance Euclidean -level 50%,-50% )' -morphology Distance Euclidean -compose Plus -composite -level 43%,57% -resize 12.5% 1.png
  </code></pre>
  <p>It gives me:</p>
  <blockquote>
  <p>convert: no images defined `1.png' @
  error/convert.c/ConvertImageCommand/3187.</p>
  </blockquote>
  <p>but it is exists! I tried to execute that command with the debug option enabled:</p>
  <pre><code>$convert 1.png -filter 'Jinc ( +clone -negate -morphology Distance Euclidean -level 50%,-50% )' -morphology Distance Euclidean -compose Plus -composite -level 43%,57% -resize 12.5% 1.png -debug all
  </code></pre>
  <p>I get this output: <a href="http://pastebin.com/gsw7KszH" rel="nofollow noreferrer">http://pastebin.com/gsw7KszH</a></p>
  <p>What's wrong with my ImageMagick's configuration? I use the latest macOS.</p>