Sorry to say, all of you have wrong concept about digital camera here. In brief
I
would say a 4 megapixel digital camera has "resolution" very close to a 4
megapixel
scan, even the DC only possess 4 millions CCD while the CCD in scanner is three
times
more.
Each pixel (CCD) on the digital camera contribute to resolution but a few pixels
together (could be 4) contribute to the color of each pixel, it require complex
calculation, could generate wrong color on individual pixel, but the overall
picture
will still look very good.
To refresh your memory, please have a look to my web comparing the resolution
of E-10
and Velvia with 35-70/3.6 Zoom.
http://www.glink.net.hk/~digicam/E10V35.htm
To see some beautiful E-10 shots:
http://www.glink.net.hk/~digicam/
C.H.Ling
----- Original Message -----
From: "Tom Scales" <tscales@xxxxxxxxxxxxx>
> Useful, but I think you have it backwards. A 4megapixel camera is equivalent
> to a 1megapixel scan.
>
> Tom
>
> >
> >
> > Tom - it's worth saying it again, but pixel counting is hijacked by
> digital camera marketing brochures! For digital cameras they count the
> total number of photosensitive cells in the CCD - and they are in groups of
> 4 with one for red, two for green and
> > one for blue. (Don't ask me why - the answer is on the web - somewhere!).
> For scanners we count one pixel as being able to represent any colour. So
> when you think about a 4megapixel camera compare it to a 16megapixel scan...
> >
> > For a better explanation and loads of experimental examples, see:
> http://www.users.qwest.net/~rnclark/scandetail.htm
> >
> > And to quote directly from this site: "Film is scanned with each pixel
> have a red, green and blue value, so the 3260 x 4472 pixel scan of the 35mm
> film is 14.6
> > megapixels. But these are not the same as the pixels in a digital
> camera. In a digital camera, each pixel is ony a red, or a green, or a blue
> pixel. Digital cameras have 50 0reen, 25% blue and 25% red pixels (thus
> called RGBG). So a 1 megapixel digital
> > camera has 1 million red + green + blue pixels. Thus, the 35mm scan has
> 14.6 * 3 pixels or 43.8 megapixels in digital camera equivalent pixels. "
> >
> > So, do we have to buy an E-10 yet? Yes, for fun, but keep the OM and the
> scanner for serious stuff!
> > best regds
> > jez
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|