6 Jun
2013
6 Jun
'13
11:02 a.m.
On Jun 5, 2013, at 11:11 PM, Lars Borg wrote:
At 2:24 PM -0700 6/5/13, Iliah Borg wrote:
Cameras are (essentially) linear devices.
In respect to what? ;)
We have irregular shapes of spectral characteristics of CFA. Consider what happens when the intensity of red light is too small to cause a reasonably noiseless response in the green and blue channels.
Noise and linearity are orthogonal issues as far as I know.
It is about how the sensor reacts to low levels, and what type of noise reduction is used on the sensor and in data processing chain before raw is written. All of a sudden channel response to spectrum changes because for low intensity light the lap of the bandwidth is not recorded at the same way. -- Best regards, Iliah Borg