In praise of AA filters

Started Oct 23, 2013 | Discussions thread
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hjulenissen Senior Member • Posts: 1,896
Re: Pro AA filter users forget Sigma's Foveon sensor
1

Basalite wrote:

it needs to be emphasized that the Foveon sensors in Sigma's cameras do not need nor do they have such a filter

It needs to be emphasised that aliasing occurs for any sampling that is fed signal energy beyond the Nyquist frequency (after pre-filtering). This is true for Foveon-type as well as achromatic sensors.

Computer games are not rendered through a Bayer CFA. Still, anti-aliasing techniques are quite popular.

-k

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