[Tig] camera dynamic range quotes are getting silly!

Bob Friesenhahn bfriesen at simple.dallas.tx.us
Sat Feb 19 00:11:45 GMT 2011


On Fri, 18 Feb 2011, peter_swinson at compuserve.com wrote:

> I do accept that unlike film, electronic capture devices can have 
> their gains cranked up & down. I guess decent photomultipliers or 
> Large area avalanche photo diodes can be cranked to give out a 
> signal with just a few photons, then cranked down to require 
> millions of photons to generate a signal. Just not at the same time.

If the sensor device does not have an issue with saturation, then the 
problem can be dealt with by monitoring the same output signal with 
multiple amplifiers at once.  Each amplifier would then have a 
different gain, with only part of its range being used.

Bob
-- 
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/



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