Re: 16 bit editing...

[Jerry Olson <jerryolson@rrv.net>]

Mike,

Then could you please tell me why every single image I make can be
manipulated cleaner in 16 bit mode than in 8 bit mode? Especially in
black and white! There is always noise in the shadows when an extreme
curve is made in 8 bit, but not 16 bit.

Is this a phenomenon of drum scanners, which I suppose Dan uses? Maybe
it's true for really high end scanners, but the ones we mortals use do
indeed show a difference! What would cause this to be the case in my
workflow? It's so obvious to my eyes, that something must be going on
that I am unaware of, or I must have a setting wrong somewhere. If this
is really true, (and I've never read anywhere that it was,)  It's always
"Edit in 16 bit mode!", what would your best guess be as to what I'm
doing wrong?


Jer
>
 But I gotta tell you, I have yet to actually see these
> differences in real pictures. MANY are very passionate about editing in 16
> bits. They give you the reasoning. They present charts and graphs. They give
> you test cases (like color bands), instruct you to perform various editing
> functions, then tell you to evaluate the histogram to see the differences. But
> in all my years of doing this, I have yet to have 1 person present 2 real
> pictures, one edited in 8 bits, the other in 16 bits, that actually reveals the
> difference. It's not just me either. Dan Margulis, author of Professional
> Photoshop apparently has a standing bet. From what I've heard, he's challenged
> anybody to produce an image that reveals the difference in the image, not in
> charts or graphs. From my understanding, nobody has done it yet.
-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.