title: RegEx syntax for ImageMagick "identify" within bash shell
body: <p>I'm trying to run the ImageMagick identify command on a very large path of images where Identify returns the image dimensions of files that match a pattern. The pattern I'm trying to match is:</p>
  
  <pre><code>/jewelclub_[a-z0-9]{1,}_(small|medium|large|zoom)\.jpg/
  </code></pre>
  
  <p>When I try to execute the following two commands, the first succeeds and the second fails which seems like there must be something wrong with my RegExp:</p>
  
  <pre><code>(1): identify -format "%f %w %h %b \n" 'jewelclub_*\.jpg'
  (2): identify -format "%f %w %h %b \n" 'jewelclub_[a-z0-9]{1,}_(small|medium|large|zoom)\.jpg'
  </code></pre>
  
  <p>Any advice on how to change my PCRE syntax in command #2 to a compatible RegEx flavor (BRE? ERE?)?</p>
  
  <p>Thanks in advance for the help.</p>