For one camera, the black level of the sensor will make the output non-zero when it is covered. For example the output of the sensor is 10bit and black level is 63, if the output is reduced by black level, the range of the output will be 0~960. So the dynamic range is reduced from 0~1023 t0 0~960. Am I right?
From one document, there is one figure enter image description here
I am not a electronic engineer, so I don't understand why the analog offset is added to pixel voltage. The output of ADC is reduced by digital offset, do this will reduce dynamic range greatly?