Yes, that sounds accurate. I believe the colored grid patterns are
proprietary and so are the algorithms that create the final images.
Usually there are more green filters than red and blue, as I understand
it. The program in the camera takes a grid of the red green and blue
pixels (they may be RGGB or GBRGB, or something like that) and
calculates what the final pixel color should be. That is stored and the
camera goes on to the next pixel. That was one of the big advantages of
the Foveon technology - it actually has 3 layers, like film and so
doesn't require the elaborate calculations.
Jim Caldwell
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx
[mailto:owner-olympus@xxxxxxxxxxxxxxx] On Behalf Of Winsor Crosby
Sent: Friday, September 06, 2002 8:21 PM
To: olympus@xxxxxxxxxxxxxxx
Subject: RE: [OM] Digital SLR
>It doesn't get rid of them, just 'maps' around them so when the final
>image is generated it ignores the 'bad' pixels. You don't really get a
>1:1 image pixel for pixel in a digital camera. It actually builds the
>image from a grid of CCD pixels which have filters over them to respond
>to red, green, or blue light. It's one of the reasons digital cameras
>have a delay after tripping the shutter - it's not only the storage
>speed!! It actually has to build the image.
>
>Jim Caldwell
I am sure you are right but I do have a problem getting my brain
around lack of 1:1 correspondence to the optical image. Do you mean
that the information from a nearby pixel is duplicated and
substituted for the dead one, like a cloning stamp in Photoshop?
--
Winsor Crosby
Long Beach, California
.
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