[HUG ] Re: IMG: Triptych

Hi Mark,

> A raw file is s digital negative
> A tiff or Photoshop psd file is a contact print made from that negative.
>     its darned good; but its not all there.

For a TIFF, I can't speak for a PSD file, there can be absolutely no loss at
all.  It can be absolutely %100 equal to "raw".  It depends on what is done
to the TIFF file.  If setpoints and tonal curves (or Bayer pattern
reconciliation) are done, then what you say is true.  But, there is no
requirement for a TIFF file to have that set.  The Leafscan scans it's "raw"
scans (no setpoints and no tonal curves) to TIFF files.

Also, all raw files are not the same.  The raw file typically does have
*some* level of processing done, at the very least the PRNU, and even more
so, the white balance (setpoints) and possibly some other processing.  So,
"raw" may not be as raw as you would like.  But, having the camera do some
level of processing isn't a bad thing, necessarily.  Each sensor system can
be characterized, and that characterization applied to the data to
calibrate/normalize it.  It's like having a "profile", like an ICC profile
for printing, or calibrating your capture/development/printing for film.
Everything is relative, and needs to have some level of calibration to be
effective.

> Don't listen to me...

Sometimes I do, sometimes I don't ;-)

> google it yourself

I don't need to "Google" it.  I know how image capture is done, since I've
designed quite a few digital cameras and scanners.  And you know that.

Regards,

Austin


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