Digital BW, The Print

In a message dated 4/9/07 8:37:26 PM, BKPhoto@... writes:


> 
> I respectfully disagree. Image edits such as density/contrast changes, or 
> color balancing redistribute data within the image file.
> 
How does one 'redistribute' 256 values into the same 256 slots without 
dumping some, and interpolating others? Thats where high bit can be useful, though 
not perfectly useful, in supplying some values that may be better than simple 
interpolations, and capturing the 'dumped' values in a way that MIGHT actually 
utilize them later. Color balancing has no choice but to follow the same 
process. Counterintuitive as it may be, image editing is a downhill slope all the 
way, no matter how much better the results may look to the eye than the 
original. 

In fact, on way of thinking about it is that the   process is one of 
optimizing for the perceptual nature of the eye, from the linear source. Take a look 
at what a 'RAW' file really looks like (in its original form) if you don't 
think that the trip from source to perpeptually ideal isn't a rollercoaster ride 
downhill!

C. David Tobie
Product Technology Manager
ColorVision Business Division
DataColor Inc.
CDTobie@...
www.colorvision.com


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