Hi, Daniel Egger <egger@xxxxxxx> writes: > Okay, so you work on 2 pixels concurrently by using corresping masks. read the code (and my mail) again. I'm not doing operations on 2 pixels. The code is combining the multiplications done on 2 channels of the same pixel into one. Also it is also meant as an example of what can be done without using CPU-specific instructions. Salut, Sven