In praise of AA filters

Started Oct 23, 2013 | Discussions thread
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(unknown member) Veteran Member • Posts: 5,593
Re: Pro AA filter users forget Sigma's Foveon sensor

Tom Axford wrote:

Basalite wrote:

Wikipedia: Foveon X3 sensor

"Because demosaicing is not required for the Foveon X3 sensor to produce a full-color image, the color artifacts ("colored jaggies") associated with that process are not seen….

I think this is an example of the weaknesses in Wikipedia: the authors of the articles are unknown and sometimes exaggerate their case, or even get things wrong!

As hjulenissen has pointed out, any sensor array will produce aliasing.

I never said the Foveon couldn't.

People really need to read more carefully instead of anxiously looking forward to respond.

In the case of an irregular array it will not produce the usual moire patterns, which is a huge advantage, but it will still give jaggies on straight edges (they may be irregular jaggies matching the irregular array).

I think the only way to alleviate these problems is to blur the image, either before or after it gets captured by the sensor.

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