问题
The Fourier transform of the convolution (with stride 1) of two images is equivalent to point-wise multiplication of their individual Fourier transforms. I need to perform stride-'n' convolution using the above FFT-based convolution. For some reasons I need to operate in the frequency domain itself after taking the point-wise product of the transforms, and not come back to space domain by taking inverse Fourier transform, so I cannot drop the excess values from the inverse Fourier transform output to get equivalent stride - 'n' convolution. How can I account for the stride in the frequency domain? Thanks.
来源：https://stackoverflow.com/questions/61246468/using-fft-convolution-when-stride1