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Is there some way for matchTemplate to work with a non-rectangular templ? For example to use the alpha channel, etc to ignore certain pixels when calculating the score?

The various formulas for scores SHOULD generalize to non-rectangular templates.

Alex Rothberg
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  • might help: http://stackoverflow.com/questions/4761940/opencv-template-matching-and-transparency – anderstood Mar 21 '15 at 21:37
  • This is a dupe of https://stackoverflow.com/q/16029844/1709587; the short answer is to use the `mask` parameter to `matchTemplate`. I can't VTC as a dupe because my answer there has no upvotes, though. – Mark Amery Sep 15 '18 at 19:17

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If you are using openCV 3 you can use mask to do template match on non-rectangular regions.

But in case you are using openCV 2, you have to write your own function to mask your template and then do template match on the source image.

Neeraj Komuravalli
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