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[Laurent Vaucher <laurent.vaucher@xxxxxxxxxx>]

If I was interested in trying to implement that feature, where should I start? 
I've seen that the matching process relies on OpenCV function 'matchTemplate', but from its documentation I'm not even able to tell if there is a way to exclude some pixels.

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https://bugs.launchpad.net/bugs/673995

Title:
  [request] Transparent pixels should be ignored in matching process

Status in Sikuli:
  New

Bug description:
  I'm using Sikuli 0.10.2 on a 32-bit Windows XP system. I just noticed
  that if you are using a png file, containing transparent pixels as a
  pattern for image recognition, these pixels are not skipped during the
  matching process, thus resulting in a wrong match if you have some
  kind of background under the transparent part of the image. I think
  this behavior is incorrect - and Sikuli could be even more powerful if
  able to skip some pixels from the pattern.

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