20 Apr
2004
20 Apr
'04
7:50 p.m.
On Wed, 21 Apr 2004 00:03:36 +0100 (BST)
ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
Yes. E.g. with Bayer you have
four sub-pixel per color pixel:
R G
G B
So you get 640 x 480 = ca. 0.3 M "true" color pixels with a 1280 x 960
"Mega pixel" sesor. The image processing firmware of the camera
interpolates this later to 1280 x 960 RGB pixels.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
Moreover,
3.1M pixels in the camera aren't 3.1M pixels in the final
image. It depends how they're used, but in the camera, you
typically need three pixels, one for each of R, G, and B, to get one
RGB pixel in the image. Some techniques use even more (the Bayer
algorithm uses 4).
Argh!. You mean they fiddle the figures? I'd assumed that a
'pixel'
was an RGB triad, not a third of one. So you mean you may only get 1
million points in the image from a 3.1M pixel camera?