find the angle between two very similar pictures in matlab

Question

hi i find the angle between 2 similar(but not the same) pictures ?

i used

hVideoSrc = vision.VideoFileReader(filename, 'ImageColorSpace', 'Intensity');

imgA = step(hVideoSrc); % Read first frame into imgA
imgB = step(hVideoSrc); % Read second frame into imgB

    figure; imshowpair(imgA, imgB, 'montage');
    title(['Frame A', repmat(' ',[1 70]), 'Frame B']);
figure; imshowpair(imgA,imgB,'ColorChannels','red-cyan');
title('Color composite (frame A = red, frame B = cyan)');

from http://www.mathworks.com/help/vision/examples/video-stabilization-using-point-feature-matching.html but it not help anybody have a idia

Answer 1

Just wanted to flag that an algorithm that is very similar to Patrick's suggestion exists in the Image Processing Toolbox as of R2014a. It is named imregcorr and uses phase-correlation in the log-polar domain. This might also work very well for this problem, I haven't tried it yet.

http://www.mathworks.com/help/images/ref/imregcorr.html

http://adessowiki.fee.unicamp.br/media/Attachments/courseIA369O1S2011/Ex13/phasecorrelation5.pdf