My understanding is that red and blue are mapped 1:1 but there are duplicate
green pixels [try mapping triangular groups onto a square grid] and those are
the ones that need to be computed. I presume that if a known bad ["hot"]
pixel is green then it will just be ignored, from your description.
Of course, I'm sure there are other ways of attacking this problem. Kodak has
a good primer on imaging technology on their web site if anyone's interested.
I believe it's buried within the Professional side of things.
andy
ps. If we ever get real Foveon chips ... look out film! 1:1:1 mapping as the
color layers are overlaid.
On Fri, 06 Sep 2002 20:02:36 -0400, "Jim Caldwell" <jamesfc@xxxxxxx> wrote:
> 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
>
> -----Original Message-----
> From: owner-olympus@xxxxxxxxxxxxxxx
> [mailto:owner-olympus@xxxxxxxxxxxxxxx] On Behalf Of Winsor Crosby
> Sent: Friday, September 06, 2002 7:57 PM
> To: olympus@xxxxxxxxxxxxxxx
> Subject: RE: [OM] Digital SLR
>
>
> >I had borrowed the E-20 for a weekend and found the noise issues.
> >does your E10 not have Automatic Pixel Mapping to get rid of dead
> >pixels? It was a firmware upgrade at one point.
> >
> >on the APM point, does any other manufacturer offer this feature?
> >seems very handy
> >
> >-Bill
>
> I am clueless. What is Automatic Pixel Mapping and how does it get
> rid of dead pixels?
> --
> Winsor Crosby
> Long Beach, California
>
> .
>
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