Mailinglist Archives:
Infrared
Panorama
Photo-3D
Tech-3D
Sell-3D
MF3D

Notice
This mailinglist archive is frozen since May 2001, i.e. it will stay online but will not be updated.
<-- Date Index --> <-- Thread Index --> [Author Index]

P3D Re: digital and film

  • From: Tom Deering <tmd@xxxxxxxxxxx>
  • Subject: P3D Re: digital and film
  • Date: Tue, 25 Aug 1998 06:00:05 -0400 (EDT)
On 8/24/98, John Toeppen wrote:

>The Kodak Photo CD at 4000 lines is not lossless, and they do have a
>8000 line scan (nearly lossless-is grain worth recording)

"Lossless" and "lossy" are terms that describe the quality of digital image
compression.  It has nothing to do with film grain at all, and nothing to
do with the resolution of a scan.

A "lossless" compression method leaves the photo mathematically identical
to the original.  With a "lossy" method, little bits are discarded.

Lossless is a requirement for high quality work where you might need to
crop or enlarge.  Lossy schemes introduce artifacts which are visible upon
enlargment.

The images on a Photo-CD are indeed lossless.

Tom



------------------------------