On Fri, 2010-01-15 at 18:07 -0600, Paul Hartman wrote:
> On Fri, Jan 15, 2010 at 5:54 PM, David Hodson <hods...@ozemail.com.au> wrote:
> > On Fri, 2010-01-15 at 13:32 -0600, Paul Hartman wrote:

> >> [...] the same JPG can be interpreted differently by
> >> different software, so opening it in GIMP might look different than
> >> another program perhaps.
> >
> > I'm fairly sure this is not true - there is only one way to uncompress a
> > JPG file, so all programs should create the same uncompressed version.
> >From an old JPEG FAQ:
> "Another important aspect of JPEG is that decoders can trade off
> decoding speed against image quality, by using fast but inaccurate
> approximations to the required calculations.

Good point. I would argue that's not really interpreting the JPG
differently, just being more or less accurate in your interpretation.
However, the user may still see some minor differences.

> Also, of course, things like color management and other kinds of
> post-processing can cause differences when the same file is opened in
> different programs.

Of course.

-- David

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