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VIVOTEK
2. License plates can be hidden in a shadow against a bright background; or, posed agaisnt a very
strong light source such as a vehicle's headlights. Details are easily lost in these bad lighting
conditions.
Once the Bracketing mode is selected, the related configuration applies to the camera's 3 video
streams. Different streams can be polled for an overview or for identifying a license plate.
IP9172-LPC camera
(Bracket Exposure mode is ON)
Limitations:
1. Note that due to the production of multiple exposures, the fame rate is halved, max. 30fps.
2. In the Barcketing mode, the video analysis functions do not apply, including
* Tampering detection
* Motion detection
* Smart stream.
62 - User's Manual
Stream #1
LPR shutter time setting:
Max. shutter time to support various vehicle speeds
Stream #2
Bracket Exposure setting:
User-configurable EV ratio based on Stream 1 to cover more scenes
(wider range of dynamic contrast: 2x, 4x, 6x, 8x,....)
Stream #3
For 3rd-party LPR software which comes with
exposure bracketing capability.
Overview for car brand, type & traffic monitoring
Overview for car brand, type & traffic monitoring
AEB original image (flashy):
* Even frames for LPR view
* Odd frames for overview
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