Re: Crop JPEG without decreasing quality

> There's a list of such programs at
> http://jpegclub.org/losslessapps.html

That's great, thanks.

> Because it wasn't saved at 100% before.

Does this mean, that I can actually "upscale" the compression of a saved
jpeg ??? A jpeg with 75% quality can be saved to 100% of the original again?
I thought that using 100% on a 75% quality-jpeg would nearly (!) result in
the "full" 75% image again...

Thanks,
Nico