On Mon, 2010-01-18 at 10:40 +0100, yahvuu wrote:
> Philip Rhoades wrote:
> > It still seems counter intuitive that opening a JPG (even if it is a 
> > photo rather than a computer generated image) and immediately saving it 
> > with 100% "quality" increases the size by 2.5 . .

That is only non-intuitive because you are making the wrong assumption
that the JPEG quality was measured in percent. It isn't, it's just a
quality level that happens to have a range of 0 to 100. I suggest that
you read the JPEG FAQ, in particular the answer to question 5:



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