rotation between two images automatically with SIft ??

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john vattic
john vattic 2015-1-19
I have two images, the first is a reference and the second is an image rotated. i have used the the fct : - VL_SIFT(I) computes the SIFT descriptors in both images so the geometry information is provided
[f1,d1] = vl_sift(im1g) ; [f2,d2] = vl_sift(im2g) ; - match the interest point by nearest neighbor algorithm.
i would like to know after matching how can i recognize the angel of rotation between that tow images automatically
thanks

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