That seems to prove out.
Dick
Winsor Crosby wrote:
> One of the things that Photoshop introduced, as I understand it, is
> selective JPEG compression. Only the pixels that get changed by a
> photo manipulation get a new jpeg compression. The pixels not changed
> by manipulation are not recompressed anew. So opening and and doing a
> jpeg save repeatedly in PS does nothing unless you change the
> compression parameters or change the file.
>
>
>
> Winsor
> Long Beach, California, USA
>
>
>
>
> On Apr 9, 2007, at 1:15 PM, Richard Ociepka wrote:
>
>> Using Photoshop I opened and saved a JPEG 25 times without any
>> noticeable degradation.
>> The file size also increases a little on every save.
>>
>> However, with ACDSee9 there was a noticeable loss after only 5 saves.
>> http://www.pbase.com/ociepka/psc
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