Re: Measuring DMAX

[Katharine Thayer <kthayer@pacifier.com>]

On Jan 15, 2008, at 12:46 AM, Kees Brandenburg wrote:

> Hi Marek,
>
> Vuescan <http://www.hamrick.com> can do that. First check the  
> 'Enable Density Display' option in preferences. Then point your  
> mouse to a location in the scan/preview window and hold the control  
> key. Vuescan displays the log density readings of the raw scan.  
> These readings are not altered by your scanner settings or profile.
Kees, I get three density numbers at any given point  whether the  
image is in color or black and white. Is it reading three color  
densities for each point, or what?  I can't see any particular  
relationship between the density readings and the 0-255 readings from  
the same coordinates (that you get when you stop depressing the  
control key).   Is there any way to get one density reading for a point?
Katharine