----- Original Message ----- From: "Jens Bladt"
Subject: RE: Reducing File Size with Photoshop
I guess I don't understand what a jpeg compression really does!
The way it was explained to me (probably by someone on this list).
Imagine you have 50 identical pennies on a table top.
An uncompressed file describes each penny in detail.
A JPEG describes one penny in detail, and then tells you where the other 49 are located on the table.
Works well, as long as all the pennies really are identical.
It doesn't work so well when each penny is slightly different, but still within the resolution of the descriptor.
Thats when data loss starts to be a factor.
William Robb
