Re: [APML]: Scanners (using Gamma settings)

[Chuck Vaughn <aa6g@aa6g.org>]

johrt@cableregina.com wrote:
> 
>> A value of 1.0 is normally fine.
> 
> It would be if the film has a gamma of 1.0 :-)

Would you suggest setting the gamma to the inverse of the film
gamma like you mentioned in your example of TV? Of course film
has the "S" curve problem but that could be poorly approximated
with the adjustable curve function in the scanning software.
 
> >My scanner software also has something called "Exposure" adjustment
> >which turns out to be very important. 
> >....
> >Plus makes the image brighter and minus makes it darker.
> 
> Exposure sounds like it is trimming the gamma function.  Do you want to
> persue this offline?

I don't know if anyone else would be interested or not. I know at
least one other person on this list has the same scanner as I do.
Other scanner software must have similar controls. The gamma, contrast,
brightness and exposure controls are so interactive that it's hard
to know what to set to where. A number of combinations produce similar
looking results on the monitor.

I should be up front and say that I'm more concerned with getting
the most off my negatives and displaying it on a monitor so it looks
as good as possible than I am translating what's on the negative
accurately to digital data. That may or may not be the same thing.

Perhaps there's a better way to approach the controls then just 
experimentation.

Thanks,

Chuck  <aa6g@aa6g.org>