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DPChallenge Forums >> Tips, Tricks, and Q&A >> Jpeg over time
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Nikon D100
 05/28/2003 03:08:30 PM · #1
My question involves the integrity of Jpeg images over time. I know that each time you save in photoshop, the image goes through a new compression therefore losses quality each time you save. But does a Jpeg image loose quality by simply moving a file from one location to another (folder to folder). What about copying (such as dragging the file from your cd drive to your hard drive or visa-versa? Thanks in advance.
Sony Alpha a6400
Sony E 16-50mm f/3.5-5.6 PZ OSS
 05/28/2003 03:24:27 PM · #2
No.
Canon EOS-450D Rebel XSi
Canon EF 50mm f/1.8 II
 05/28/2003 03:25:15 PM · #3
No, copying or moving a Jpeg file does not make the file or image lose quality. The same bits and bytes are still in the same relative place in the file. You can copy it back and forth a hundred times and the file and image will be exactly the same.

Fujifilm X100VI
 05/28/2003 04:53:48 PM · #4
But when you burn to a CD it is wise to let the program verify if it hasn't made any faults and corrupted your CD. I have some old CD's from a 2x no gimmicks burner where half the files are corrupt. :(
Oh well, it are only company backups, fortunately not my photo's. :)


RIM BlackBerry Curve
Canon EF 85mm f/1.8 USM
 05/28/2003 05:14:25 PM · #5
Originally posted by Azrifel:
But when you burn to a CD it is wise to let the program verify if it hasn't made any faults and corrupted your CD. I have some old CD's from a 2x no gimmicks burner where half the files are corrupt. :(
Oh well, it are only company backups, fortunately not my photo's. :)


Verifying the CDs is a good idea - but these kind of errors can be introduced over time, particularly if you don't store the disks correctly.
Fujifilm X100VI
 05/28/2003 05:26:25 PM · #6
Yes, nowadays I always verify and have two copies at different locations. :)
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