Does anyone know for sure if the "compact old files" command in Windows XP
causes any degrading of JPG files?
Getting no definite answers in MS XP groups.
shakey <noone@nearsonic.net> wrote:
>Does anyone know for sure if the "compact old files" command in Windows XP
>causes any degrading of JPG files?
>Getting no definite answers in MS XP groups.
It does not degrade any of the files it compresses. Decompressing
will result in a file identical to the original.
Of course, it won't actually make a jpg file any smaller, either,
because jpg files are already compressed.
"shakey" <noone@nearsonic.net> wrote:
>Does anyone know for sure if the "compact old files" command in Windows XP
>causes any degrading of JPG files?
It's a standard lossless compression algorithm that is used for any file
type. Would be pretty bad if let's say a database would be "degraded" by
this compression, wouldn't it?
Of course it's mostly pointless for JPEG files because the JPEG format is
compressed already. It's rather unlikely that the XP compression algorithm
would do noticably better.
JPG compaction 
Linear Mode
