I'm only as far as 101.5 8-)
Keith Whaley wrote:
>
> Good explanation.
> I'm learning...day by day...
>
> keith
>
> mike wilson wrote:
> >
> > Hi,
> >
> > Keith Whaley wrote:
> > >
> > > Okay, but...
> > > A saved size of 17.3 MB sounds like it didn't save in .jpg but RAW!
> > > Does Photoshop do something to an imported image that would account for
> > > that massive increase in file size?
> > > The poster said the file size of each downloaded and saved image file, I
> > > assume on his computer, was between 1.9 and 3.02 megs. That sounds about
> > > right for an as-recorded jpeg image, doesn't it? One saved with
> > > absolutely minimal compression? Or, is there such a thing with jpegs?
> > > Saved with essentially no compression?
> >
> > Time for another 101, I think.
> >
> > The only analogy for JPEGS I can come up with is those balloons with
> > words printed on them. When it's inflated, you can read the words.
> > When it's deflated, you can't and the balloon is much smaller. That's
> > what JPEG image files are like. When you save them, they are the
> > deflated balloon. Imaging software (all types) reinflates the balloon
> > so that you can see it properly. Good imaging software doesn't lose any
> > of the words on the balloon, although if you inflate and deflate (view
> > and _save_ - that is where the analogy falls down) many times the words
> > start to crack off and become crinkly.
> >
> > So a JPEG will be smaller when it is a saved file that when it is
> > expended into the viewing software. The 17.3Mb is not the saved size,
> > it is the size the software "inflated" it to.
> >
> > Other types of files are like balloons that you can only blow up once.
> > When they are inflated, that's it - they stay that size.
> >
> > mike
