The efficiency comes from the fact it uses convolve_fft to convolve the image. It’s always faster to use this when convolution kernels are large (convolution is just a complex multiplication in Fourier space).
The efficiency comes from the fact it uses convolve_fft to convolve the image. It’s always faster to use this when convolution kernels are large (convolution is just a complex multiplication in Fourier space).