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In case of image inputs for estimateRigidTransform() what feature points are computed? Are they similar to SIFT/SURF/FAST/ORB?

asked 2017-07-03 15:21:45 -0500

ambikav gravatar image

I'm starting to work with estimateRigidTransform(). It allows two types of inputs - Vector or mat of 2D points OR two input images. It is mentioned in docs that some feature points are computed in case the inputs are images. What are these features?

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answered 2017-07-04 01:06:52 -0500

berak gravatar image

updated 2017-07-04 01:43:42 -0500

if you pass grayscale (CV_8U) images to estimateRigidTransform(), it will use sparse optical flow based on simple grid points, see src code

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Thanks for clarifying this!

ambikav gravatar imageambikav ( 2017-07-05 19:22:41 -0500 )edit
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Asked: 2017-07-03 15:21:45 -0500

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Last updated: Jul 04 '17