Can someone explain (or point me to) how anti aliasing filter works? I know what it does (see fyi below). I don’t know HOW it does it (physically). Is it some type of lens that defuses the light across multiple pixels to soften contrast transitions?
It seems that AA filtering should be done in software processing, not at the capture phase.
fyi, this is the function of an AA filter..... An AA filter is an optical assembly that fits in front of the sensor and behind the camera lens. It eliminates aliasing by lowering the high-frequency/high-contrast areas in an image that would normally exceed the sampling capability of the sensor and thereby reduces/limits the effect of moiré patterns, contrast jaggies (stair step), etc.
p