Given a high enough resolution, in certain cases, we can avoid processing all the pixels in the image by down-sampling (e.g. processing every other pixel, effectively down-scaling and resizing the image using nearest-neighbor filtering). This would allow a proportional performance gain based on the down-sample factor (e.g. allow an integer factor between 2x-8x representing the reduction in pixels in both the x- and y- directions), given appropriate memory layout and array slicing/indexing would allow for it.
Given a high enough resolution, in certain cases, we can avoid processing all the pixels in the image by down-sampling (e.g. processing every other pixel, effectively down-scaling and resizing the image using nearest-neighbor filtering). This would allow a proportional performance gain based on the down-sample factor (e.g. allow an integer factor between 2x-8x representing the reduction in pixels in both the x- and y- directions), given appropriate memory layout and array slicing/indexing would allow for it.