title: How to harmonize a color image
body: <p>i'm searching a approach to harmonize the colors of some images.</p>
  
  <p><s>On youtube i found a video which illustrate it:
  <a href="http://youtu.be/DvrUYtLju4Y" rel="nofollow noreferrer">http://youtu.be/DvrUYtLju4Y</a> But they doesn't add some paper or a implementation.</s></p>
  
  <p>Have someone an idea?</p>
  
  <p><strong>//Update</strong></p>
  
  <p>Okay, sry. Of course i read a paper befor i asked this question. See <a href="http://www.igl.ethz.ch/projects/color-harmonization/harmonization.pdf" rel="nofollow noreferrer">Color Harmonization</a>. 
  There i read about something about some hue-"harmonize pattern". They generate a hue-histogram from the current image and compare it with these templates. My problem is to find the best template for the current image. A normal compare of 2 histograms doesn't work, because there is an angle. </p>
  
  <p><strong>The question is how can i find the best pattern for my image?</strong>
  <img src="https://i.stack.imgur.com/UvE1P.png" alt="harmonize pattern"></p>
  
  <p>greetings</p>