Was just wondering if any of you know how serious this might be?
It's been several years @ least 3, but I was watching a genealogy show back when we had cable/satellite, and they had an episode on scanned photos and digital cameras.
Their "expert" said that the way JPG's were compressed was EVERY time the file was opened and closed...ie a new compression was happening every time you were "accessing" the file. And because of multiple compressions, jpg files were not a good way to back-up heritage photos, because they will loose quality after multiple compressions...or that you needed to at least keep a copy that was not opened and closed all the time.
I was wondering if anyone had ever heard this before? I certainly hadn't heard anything like that before~ degrading a jpg. They equated it to making photo copies of photo copies.
Wondering if "windows viewer" or things like Picasa might be enough to instigate a new compression?
I keep backups, but haven't really backed up photo JPG's on disk. I would assume that once burned a jpg on a CD or DVD shouldn't be changing the files, because computers can't be rewriting the information on the disk again.
Thoughts or info?