Archived posting to the Leica Users Group, 1999/10/13

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Subject: Re: [Leica] Re: pixel count, was Paperless???
From: "Anthony Atkielski" <anthony@atkielski.com>
Date: Thu, 14 Oct 1999 00:27:17 +0200
 
From: Shawn London <srlondon@yahoo.com>
Sent: Wednesday, October 13, 1999 23:09
Subject: [Leica] Re: pixel count, was Paperless???


> Let me put it this way... the stated resolution of a
> CCD is not the same as the effective resolution of the
> image file that it produces.

I disagree.

> Why?  Because the image file is only based on 1/4 the
> number of pixels in the CCD which captured it.

It is based on every pixel.  The luminance resolution is very close to the
nominal pixel resolution.  The chrominance resolution is considerably lower.
However, since our vision cannot distinguish colors as well as intensity, we
cannot see this.

> While the technology is improving, the best way to
> obtain a digital image file is through scanning a
> film/slide image.  In my mind, this is the best of
> both worlds.

I agree.

  -- Anthony