MIKROTRON GmbH / EoSens 3CL
/
CAMMC301x-RG / 2020
3-27
ASCII commands instruction set
Dynamic range adjustment
Response: ACK / NAK (if :A is set to Y)
<xxxxxx>' '<ss>'-'<zzzzzz>
Parameter:<xxxxxx> = actual value
<ss> = minimal value
<zzzzzz> = maximal value
3.8 Dynamic range adjustment
The bit depth of a camera's sensor determines the number of lumi
-
nance levels, also called dynamic range. If the gray value dynamic of
the camera amounts to 8 bit, which means pixel values from 0
(black) to 255 (white), very bright areas with pixel values higher than
the value 255, will be overexposed (left picture). Dynamic range
adjustment will compensate this effect (right picture).
The four blue lines in the diagram below represent analog signals of
four different pixels which decrease as a result of exposure. The
slope is determined by the amount of light (the more light, the
steeper the slope). If a pixel reaches the saturation level, the analog
value will not change despite further exposure. Without dual slope,
pixels p3 and p4 are saturated before the end of the exposure time
is reached. As a result they will be overexposed.