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[filmscanners] RE: Kodak's alternative to Bayer sensor pattern
- To: lexa@lexa.ru
- Subject: [filmscanners] RE: Kodak's alternative to Bayer sensor pattern
- From: "Paul D. DeRocco" <pderocco@ix.netcom.com>
- Date: Thu, 14 Jun 2007 14:48:23 -0700
- Delivery-date: Thu, 14 Jun 2007 22:48:24 +0100
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> From: Julian Vrieslander
>
> Not exactly a new idea. The retina in human eyes uses a
> somewhat similar scheme. Cone cells are selectively tuned to
> red, green, and blue light. The brain integrates the outputs
> of cones to produce our sensations of color. Rod cells are
> optimized for low light levels (sensitive to a single
> quantum) and their outputs provide luminance information.
> Mother Nature has been in this business a lot longer than Kodak.
>
> The analogy between retina and the new Kodak sensor is not
> perfect. The relative concentrations of rods and cones
> varies across the retina. And if I remember right, rods are
> not truly panchromatic.
Also, I think rods are pretty much saturated in normal daylight conditions,
so the brain ignores them. In night vision, the cones are putting out zero,
so the brain ignores them.
--
Ciao, Paul D. DeRocco
Paul mailto:pderocco@ix.netcom.com
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