On 2010-12-15 01:53 , AlunFoto wrote:
2010/12/15 Larry Colen<[email protected]>:
On Dec 14, 2010, at 4:09 PM, steve harley wrote:
On 2010-12-13 11:53 , Larry Colen wrote:
This is adjusting the gain, without adjusting the offset.
I think there's an issue somewhere between logarithmic and linear scales... :-)
In principle, you ask the cirquitry to discern more finely between
intensities of light in low contrast scenes. I imagine you'd get
sampling errors for starters... :-)
that was the gist of a reply that i was drafting yesterday when the
battery died -- as i understand it, the amplification (if any) is often
right on the sensor chip and there's a strong need to keep the number of
transistors per pixel to a minimum; adding non-linear amplification (and
some way to switch/adjust it) seems like it could significantly
complicate the sensor chip in a place where complexity is trouble; some
engineer might find a clever solution, but i don't see that there's much
incentive to develop such a system when continuing to improve overall
dynamic range/bit-depth per pixel are of far broader value, and will
effectively increase the (already substantial, imo) latitude to enhance
dynamic range in post
btw, i do often encounter situations where the dynamic range is
"artificially" narrow, so i understand the desire to handle it
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