Setting custom SharpZ3 ALPR camera exposure levels in the SharpOS 13.7 Sharp Portal - SharpZ3 | SharpOS 13.7

To capture license plates in a variety of lighting conditions, the SharpZ3 camera unit's two ALPR cameras use different exposure levels. If the default settings do not produce acceptable results, you can adjust the exposure settings.

To verify that you need to make an exposure adjustment

1. From the Dashboard menu, select Camera feeds.
2. From the Camera unit menu, select the ALPR camera unit you want to test.
3. From the Cameras menu, select ALPR 1 + ALPR 2.
   Notice that one ALPR camera feed is darker than the other due to the different exposure settings assigned to each camera. In the following steps, you will be able to increase or decrease the difference in the exposure settings.
4. From the Overlays menu, select Bounding box.
5. Verify that you need to make an exposure adjustment.
   1. In low-light conditions, place a stationary license plate as close to the camera as possible while still being within range for the camera to capture plate reads.
      • If a yellow box appears around the license plate in one of the video feeds, no adjustment is required for this plate type.
        NOTE: A yellow box can only appear in one of the ALPR camera video feeds. If both feeds produce good results, the yellow box might alternate between the two video feeds.
      • If a yellow box does not appear in either video feed, continue with the exposure adjustment steps.
   2. Repeat the verification step for each plate type you want the system to identify.

To adjust the camera exposure settings

1. From the Configuration menu, click Cameras > Exposure.
2. From the Exposure menu, click Manual.
   NOTE: The ALPR 1 video feed is displayed.
3. Slightly increase or decrease the Gain and click Save.
   NOTE: The Gain increases or decreases the difference between the exposure levels of the two ALPR cameras in the SharpZ3 camera unit.
4. Go back to the Camera feeds page and retest the plate that previously did not have a yellow box.
5. If required, continue to adjust the Gain value until all license plate types are detected.