Hi there, I need to downsample images using custom-crafted kernels. I was not able to find an IPP function to do this. I could filter an image using the custom kernel and then nearest-neighbor it, but the efficiency is critical and I don't want to filter pixels I will throw away. In addition I must use separable filter/downsample (1D in X and Y, again for performance). So what I really need is a 1D filter with custom kernel and a stride (filter at every n-th pixel), do this in X and Y, and then pick a subset of pixels (every n-th pixel) to get the output image.
Are there IPP functions that will help me do this? Thanks!