AW00089317000 Image Acquisition Control
Basler ace GigE 119
7.7.1 Global Shutter
Valid for All Models
Except acA1280-60, acA1920-25, acA2500-14 (*)
acA1300-60 and 1600-60 (*): Only valid if they are operated in the global shutter mode
(*) = Switchable shutter mode (see Table 16 on page 118)
A main characteristic of a global shutter is that for each frame acquisition, all of the pixels in the
sensor start exposing at the same time and all stop exposing at the same time.
This means that image brightness tends to be more uniform over the entire area of each acquired
image, and it helps to minimize problems with acquiring images of objects in motion.
Immediately after the end of exposure, pixel data readout begins and proceeds in a linewise
fashion until all pixel data is read out of the sensor.
The cameras can provide an exposure active output signal that will go high when the exposure time
for a frame acquisition begins and will go low when the exposure time ends.
You can determine the readout time for a frame by checking the value of the camera’s Readout
Time Abs parameter.
Line 1
Line 2
Line 4
Line 3
Line 5
Line 6
Line 8
Line 7
Line 9
Line 10
Line 11
Line N-2
Line N
Line N-1
Readout Time
Exposure Time
= line exposure
= line readout
Frame Start
Triggered
Fig. 61: Global Shutter
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