Is there a ready-made function in cuda used for pading '0' for a 2D image before cufft

Accelerated Computing CUDA CUDA Programming and Performance
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1

i want to pad zeros around an image before cufft_R2C, but it has be an 1D array, is there any method to do, any suggestion is expected, thanks! by the way, i also want to do fftshift like matlab after pading.

2

You could allocate memory for the padded image, cudaMemset it to 0, then use cudaMemcpy2d to copy your image to it.

3

Quite possibly I’m missing something here, but the cudaMemset may be unecessary if the array is in global space, reading this.

4

thanks, i find the ‘nppiCopyConstBorder_32f_C1R’ function in CUDA NPP library, but the (0,0) point is the center of image, i want move it to top left corner, any method to do
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5

for all i know, this method is put my image to the top left corner of the pad image, what if i want put my image to the center of the pad image