Image Acquisition Control
Basler ace GigE 107
7.9 Overlapping Image Acquisitions
(acA2500-14 gm/gc Only)
When using a camera with a rolling shutter, there are two common ways for the camera to operate:
with “non-overlapped” acquisition and with “overlapped” acquisition.
In the non-overlapped mode of operation, each time a frame is acquired the camera completes the
entire exposure/readout process before acquisition of the next frame is started. The acquisition of
a new frame does not overlap any part of the acquisition process for the previous frame. This
situation is illustrated in Figure 54 with the camera using an external frame start trigger.
In the overlapped mode of operation, the acquisition for a new frame begins while the camera is still
completing the acquisition process for the previous frame. This situation is illustrated in Figure 55.
Frame Acquisition N Frame Acquisition N+1 Frame Acquisition N+2
= Line Exposure
= Line Readout
Time
ExFSTrig
Signal
Fig. 54: Non-overlapped Acquisition
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