8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 127
8.2.1.2.
Acquisition Stop
It can send AcquisitionStop command to camera at any time. The acquisition stop process is irrelevant to
acquisition mode. But different stop time will result in different process, as shown in Figure 8-7
Acquisition stop during reading out
Complete stop
Reading out
Stop command
Stop
time
Exposure
Incomplete
frame
Figure 8-7 Acquisition stop during reading out
As shown in Figure 8-7, when the camera receives an acquisition stop command during reading out, it
stops transferring frame data immediately. The currently transferred frame data is regarded as incomplete
frame and will be discarded.
Acquisition stop during blanking
Complete stop
Reading out
Stop command
Stop
time
Exposure
Ignored
Figure 8-8 Acquisition stop during blanking
After the MER-G-P/MER-G camera transferred a whole frame, the camera goes into wait state. When user
sends an AcquisitionStop command in wait state, the camera will return to stop acquisition state. The
camera will not send any frames even if it is just going to start the next exposing.
Due to the limitations of the sensor’s working mode, when you use the MER-133-54GM/C-P and
MER-133-54GM/C cameras, you should pay attention to the following items:
After starting acquisition or stopping acquisition, you should wait for a period of time, at least, the
time should be longer than the sum of the current exposure time and the frame period, and then
you can execute other control command.