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Hi all anyone has any idea on how to get image rotation and tilt with respect to the vertical image in OpenCV for example here IMAGE

how can a get alfa end tilt(inclination) with respect to the recognized image

Thx

Ares91
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What you're looking for is the Homography between the a perfectly "vertical" image and the image captured. This is a widely studied problem and you should be able to use OpenCV's findHomography method to do this. You would need some kind of feature descriptors as well - look at SIFT descriptors.

Utkarsh Sinha
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