On 2010-03-17 11:07 , John Francis wrote:
On Wed, Mar 17, 2010 at 09:56:11AM -0700, Larry Colen wrote:
Another post processing question that's been niggling at me. Is there
any reason that a program like lightroom couldn't do binning, and turn
14MP K20 files into 7MP files with twice the dynamic range?
Yes - the laws of physics.
Two 14-bit pixels binned together give you one 15-bit pixel (with a 7%
theoretical maximum improvement in dynamic range), not a 28-bit pixel.
dynamic range is based on the number of possible values, not on the
number of bits representing those values, so one additional bit
(regardless of the starting number) represents a theoretical doubling of
dynamic range, at least on a linear scale
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