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Subject: Re: Superior Technology: Foveon X3

In message <124svrbaagtek8e@corp.supernews.com>,
Marvin wrote:

>Actually, it is an analog of how color film works. Color
>film also has three layers, each of which responds to one
>color. And there was a B/W film with a very wide dynamic
>range. It was made up of three layers with widely different
>ASA ratings.

Bayer has three layers, too. They're staggered.

Film grain in the three layers are not aligned like the Foveon, and
aren't subject to aliasing as in the Sigma implementation.

High-DR can be done with digital and color filters, although the color
response will be different in the different ranges.

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John P Sheehy
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