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Is there a rotatational template-matching function?

asked 2014-01-09 18:54:09 -0500

xaffeine gravatar image

I am familiar with matchTemplate(), which iteratively searches for an image within another image, incrementing it in x and/or y with every step.

Is there a "rotational" version of matchTemplate, which would try several rotations of the template instead of shifting it in x/y?

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answered 2014-01-12 02:26:20 -0500

Melgor gravatar image

As I know, there is no function, that calculate the invariant version of matchTemplate. There is some article, which introduce it, but you will have implement it. Link:Link to article

But, in OpenCv there is function, which compare histogram of objects and pattern. It is CalcBackProjPath. Histogram are invariant to rotation, so you can call it once. But it can be much slower, because it use normal Sliding Window. MatchTemplate in OpenCv use Fourier Transform, what really speed up finding interesting point.

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I need to know the best-matching rotation.

xaffeine gravatar imagexaffeine ( 2014-01-13 13:43:35 -0500 )edit

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Asked: 2014-01-09 18:54:09 -0500

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Last updated: Jan 12 '14