on 8/17/01 6:00 PM, Soren Svensson (EUS) at Soren.Svensson@am1.ericsson.se
wrote:
>> From: Austin Franklin [mailto:darkroom@ix.netcom.com]
>>
>>> So from a photographic perspective, a Pixel, is the whole Quad -
>>
>> I certainly disagree with that...
>
> Well, I agree with it.
>
> Lets see this from a basic perspective. Image a chip with just 4 sensors, two
> green, one red and one blue.
>
> A camera manufacturer (and you I assume) would see this as a 4 pixel chip.
>
> I (and Karl I guess) would see it as a 1 pixel chip. Anything else is a lie.
well, it is contributing 4 data points about luminance and 1 about
chrominance. Since luminance information is more critical than chrominance
that makes it worth (to me) rather more than 1 pixel and somewhat less than
4.
the problem with this stuff is that people look at the numbers and say
'blimey, my scanner will produce a 20 Mpx file from 35mm" and do a mental
comparison which is completely invalid.
--
John Brownlow
ICQ: 109343205
