Image Rotation

2012 6 7
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I want to rotate an image through the rotation matrix whose center of rotation is variable.

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Sean de Wolski
Sean de Wolski 2012-6-7

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doc maketform
doc imtransform
Or you could pad the image so that the center of rotation is the center, use imrotate and then unpad as necessary.

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ahlem
ahlem 2012-6-7

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imrotate actually enlarges the dimensions of the image that is why I want to multiply the rotation matrix "R = [cos (angle)-sin (angle), sin (angle) cos (angle)]" with the image I

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Sean de Wolski
Sean de Wolski 2012-6-7
IMROTATE _can_ do expand the dimensions, yes. It also has a 'crop' option that maintains the original dimensions.
ahlem
ahlem 2012-6-8
Thank you sean .
Actually, my work is to implement generalized Radon whose projections are rectangles. I do the rotation of each rectangle then I go through the main image to find the peak.
that's why the Imrotate don't work with!!!

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