Global Reset Release (Grr) Readout - Smartek UCC User Manual

4.3.3 Global Reset Release (GRR) Readout

The Global Reset Release is a variation of the Electronic Rolling Shutter and supported by particular CMOS
sensors. Like the name already indicates, all lines are reset globally at the same moment and thus also
started to be exposed at the same time. As shown in Figure 31, the start of exposure of subsequent lines
is not delayed like on standard rolling shutters, the readout procedure stays the same. Since the exposure
duration of each line is extended about t
top to bottom.
Frame
Start
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line N-1
Line N
Similar to the Electronic Rolling Shutter, the progression of brightness in the image can be reduced or even
removed by a controlled illumination situation. The illumination of the sensor can in this case already be
started with the sensor exposure, but must end with the exposure of Line 1, what corresponds to the overall
exposure time configured in the camera.
ReadRow
t
Exposure
Figure 31: Global Reset Release (GRR) Frame Readout
this way to its prior, the image lightens up line by line from
t
Frame
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User Manual - twentynine
t
FrameReadout
t
ReadRow
Readout
Exposure
SMARTEK Vision | User Manual - twentynine | Doc. v1.0.2
t