fft_rotation Perform High Quality Image Rotation by FFT 1.Base http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.190.4473&rep=rep1&type=pdf 2.Refer https://dsp.stackexchange.com/questions/44200/how-to-perform-2d-image-rotation-by-fft-based-image-translation-using-matlab 3.Only rotate gray image,but it's easy to expand to color image.