使用双线性插值的图像旋转，和本站的其余旋转不同，我的旋转不会使图像缺角，好处就是旋转后他的傅里叶变换的频域图也旋转同样的角度，同样可以用来处理矩阵，来做滤波器，我在做方向滤波器，有兴趣要的可以m我。-Using bilinear interpolation, image rotation, and the rest of the rotation is the rotation does not make the image Cutaway, the advantage is that the rotation after his Fourier transform frequency domain also rotates the same angle, can also be used to handle the matrix, do the filter, I was doing directional filter, interested to m.