I tried it with ten iterations in PSP7, and saw no visible
degradation, so my finding was different from Henk's.
Attached: two 6K jpeg clips of a bit of lace, clipped out of
400x250 29K clips from an original 2700 dpi scan.
The first is a clip from a PSP7 '15%' jpeg photograph,
resaved once as
'10%' jpeg, and the other is the same clip closed, reopened
and resaved 10 times. Note that the file sizes aren't
significant, because I failed to crop them to exactly
the same size.
I suspect it might be a different story if the image had
been edited slightly between each iteration, because then
the jpegging couldn't repeat itself exactly. I haven't tried
that experiment yet because I can't think of a standardised
bit of editing to do each time. Any suggestions?
----- Original Message -----
From: Laurie Solomon <firstname.lastname@example.org>
Sent: Friday, March 30, 2001 5:51 PM
Subject: RE: filmscanners: File format
> Out of curiosity, how many timed did you do this and what
sorts of changes
> did you see? Have you tried the same experiment using
another image editing
> program to eliminate the possibility that it might be more
a by-product of
> what PSP is doing than what is generic to JPEG
> -----Original Message-----
> From: email@example.com
> [mailto:firstname.lastname@example.org]On Behalf Of
Henk de Jong
> Sent: Friday, March 30, 2001 12:59 AM
> To: email@example.com
> Subject: Re: filmscanners: File format
> I just did a test.
> Opening and saving the same .jpg file in PSP over and over
> Every step the picture is changing a little bit...
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