Digital BW, The Print

First, some questions. By 'combed' histogram do you mean only a 
histogram that contains gaps all the way from bottom to top or do you 
include those those histograms which are slightly 'combed', meaning 
those that have a base throughout most of the histogram but have very 
narrow (comblike) peaks and valleys? Also, very roughly speaking, how 
bad does this combing effect have to be before it manifests itself in 
output? Second, an observation. I took a greyscale tiff file scanned 
from my SS4000, opened the file as 16 bit in PS, duplicated the image 
and then loaded the same two curves into each image. I got the same 
histogram changes for both images. Won't hazard to guess the 
significance of this. Also, I've noticed that sometimes if hit the 
Auto Levels button I get regularly spaced bottom-to-top gaps in the 
histogram. 

--- In DigitalBlackandWhiteThePrint@y..., "Maris V. Lidaka, Sr." 
<mlidaka@a...> wrote:
> Yes - that is precisely the cause of the 'combed' histogram.
> 
> Maris
> 
> ----- Original Message ----- 
> From: "mtucker508" <mark@m...>
> To: <DigitalBlackandWhiteThePrint@y...>
> Sent: Wednesday, December 05, 2001 9:25 AM
> Subject: Re: [Digital BW] 16-bit Scanning: Why?
> 
> 
> | --- In DigitalBlackandWhiteThePrint@y..., "Austin Franklin" 
> | <darkroom@i...> wrote:
> | > What happens when you make tonal adjustments with 8 bits is 
> | you loose tonal
> | > values. 
> | 
> | 
> | Would these tones "moving around" and getting shifted be 
> | responsible for a histogram that had holes in it? (Not that I've 
> | ever had one, but a friend of a friend told me that *they* had 
> | some missing areas in *their* histograms...
> | 
> | If this is the case, then you certainly have my full-on attention.
> | 
> | Mark
> | 
> | 
> | 
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