title: jpeg compression ratio
body: <p>Is there a table that gives the compression ratio of a jpeg image at a given quality?</p>
  
  <p>Something like the <a href="http://en.wikipedia.org/wiki/JPEG#Effects_of_JPEG_compression" rel="noreferrer">table given on the wiki page</a>, except for more values.</p>
  
  <p>A formula could also do the trick.</p>
  
  <p>Bonus: Are the <strong>[compression ratio]</strong> values on the wiki page roughly true for all images? Does the ratio depend on what the image is and the size of the image?</p>
  
  <p>Purpose of these questions: I am trying to determine the upper bound of the size of a compressed image for a given quality.</p>
  
  <p><strong>Note:</strong> I am not looking to make a table myself(I already have). I am looking for other data to check with my own.</p>