JAI AD-081GE - Manual (Page 35)

AD-081GE
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10.3.3 High frame rate mode (Double speed)
In this mode, double speed readout (60fps) can be achieved by shifting the exposure timing for
each sensor by 1/2 frame. Each signal with 1/2 frame offset is read out from each RJ-45
connector respectively.
BW CCD 1
Image
Process
Frame
Memory
MAC PHY RJ45 GigE-1
BW CCD 2
Image
Process
Frame
Memory
MAC PHY RJ45 GigE-2
Fig. 18 High frame rate output
If this mode is used, the trigger mode should be set at “Continuous”. The maximum shutter
speed is 396L. The following table shows the frame rate.
Scan mode Frame rate
Full pixels 60fps
Vertical binning 99fps
If trigger in/out is used, select “asynchronous” in the readout mode and input a trigger pulse to
each sensor with 1/2 frame timing offset.
Sync mode Synchronous Shutter Trigger
mode Output
2：High frame rate Automatic Same for
BW1,2
Continuous Individual
1： Sync
(individual setting) asynchronous Same for
BW1,2
EPS Individual
10.3.4 High dynamic range mode
In this mode, high dynamic range can be achieved by setting a different exposure time for each
sensor. To use this mode, set “Readout mode” to “High dynamic range”.
The combining of the two signals uses the ratio of the shutter value for each sensor as the
coefficient. As the composition process can be done regardless of signal levels, the composed
signal is visibly smooth.
There are three built-in HDR modes, or users can choose to perform HDR image composition on
an external host PC:

High dynamic range ( Sync Mode 3)
In this mode, the composite output emphasizes the details captured by the high speed
shutter sensor, while information from the sensor with the slower shutter appears only in
the lowest (darkest) bits of the output.
The formula for the composition process is;
where,
1/m sec : shutter value of BW1
1/n sec : shutter value of BW2