Apache-Talk @lexa.ru 

Inet-Admins @info.east.ru 

Filmscanners @halftone.co.uk 

Security-alerts @yandex-team.ru 

nginx-ru @sysoev.ru 




      :: Filmscanners
Filmscanners mailing list archive (filmscanners@halftone.co.uk)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[filmscanners] RE: Density vs Dynamic range

> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> > The proposed ISO standard on "Photography - Electronic scanners for
> > photographic images - Dynamic range measurements" (WD 21550.3
> (42N 4909))
> > states that the dynamic range is calculated by:
> >
> > DR = Dmax - Dmin
> > DR = Scanner dynamic range
> > Dmax = Density where the signal to noise ratio is 1
> > Dmin - Minimum density where the output signal of the luminance OECF
> > (opto-electronic conversion function) appears to be unclipped
> Hi Dean,
> Interesting, but if that's what it says, it's simply wrong...in just about
> every statement!  I'll have to get a hold of the spec and see what it is
> trying to say before commenting much on it.

Here is a link to the standard proposal:


Since it is just a proposal comments can be submitted to:


I would appreciate your input on that.


Unsubscribe by mail to listserver@halftone.co.uk, with 'unsubscribe 
or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or 


Copyright © Lexa Software, 1996-2009.