image rotation with equations?

Question

Muneef 2013-11-27

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https://ww2.mathworks.cn/matlabcentral/answers/107723-image-rotation-with-equations

回答： Walter Roberson 2013-11-27

xrot = x*cos(θ) − y*sin(θ)
yrot = x*sin(θ) + y*cos(θ)

hold for images as well. can i rotate image with them?

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Answer 1

Walter Roberson 2013-11-27

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Yes, but you will encounter the same limitations as with imrotate(), that you will need to end up with a rectangular grid that the rotated image takes up part of. image() and imagesc() and imshow() can only deal with horizontally and vertically aligned matrices.

You should have a look at hgtransform()