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--- Jerry Olson <firstname.lastname@example.org> wrote: > 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. Jerry, I'm NOT saying there isn't a difference. I said I've never seen it. So do me a favor and post the differences so I can see it for myself. I don't do any black and white work so that's a non starter for me. I keep reading theories and claims, but nobody posts. Post the same image with the same editing steps with 8 and 16 bit images. Down sampling the 16 bit image to 8 bits, then post the images. > > 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! Then POST! I certainly don't use high end scanners. But like Dan, I haven't seen a difference for my typical subject matter. > 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? I'm not saying you're doing anything wrong. But I'm going to take one of my images and do what I suggest and then post them to show people what I don't see. I'll inform the list when it's done. > > > 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. ===== Visit my digital photography web site along with a lot of other interesting stuff at http://www.mikegreer.com. Also, Greer and Associates (http://www.greeraa.com) offers studio photography, digital imaging services, web site design/construction, and training. Mike Greer __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.