Automatic License Plate Recognition settings

Overview


Setting	Description
Analysis Resolution	Select the resolution that the Automatic License Plate Recognition video analytic uses to analyze video frames.
Analysis FPS	Select the number of frames per second that the Automatic License Plate Recognition video analytic uses to analyze video.
Simple Mode	Turn off to make the advanced settings visible.
Region For Plate Analysis	Select the regional engine that the Automatic License Plate Recognition video analytic uses to analyze the license plates that this camera detects. The list includes the regions that you select during installation.
V9 Dongle	Select this option if you are using a new license with the Default or China engine.
Enable with Motion Detection	Select this option to only perform analysis when the camera detects motion.
Enable with Relay	Select this option to only perform analysis when a relay device records an input event. When you select this option, additional fields appear that allow you to select the relay and configure how theAutomatic License Plate Recognition video analytic responds to the input event.

Processing Mask


Setting	Description
Drawing Mode	Select whether to draw areas to analyze or ignore on the processing mask.
Size	Define the size of the circle to draw on the processing mask.

Plate Detection

Use the plate detection image to draw a frame around the license plate in an image that represents a typical license detection situation. The frame can only surround one line of characters and outside boundaries of the characters should fall within the green frame.

This is an example of a good plate detection frame:

This is an example of a poor plate detection frame:


Setting	Description
Reporting Confidence	Use the slider bar to define the sensitivity of the Automatic License Plate Recognition video analytic. The reporting confidence is 50% by default. A lower reporting confidence results in more detection and might affect performance.
Minimum height	This field displays the height of the inner rectangle.
Maximum height	This field displays the height of the outer rectangle.
Minimum width	This field displays the width of the inner rectangle. This setting is only available for the Automatic License Plate Recognition Core video analytic.
Maximum width	This field displays the width of the outer rectangle. This setting is only available for the Automatic License Plate Recognition Core video analytic.
Minimum slant	This field displays the minimum slant of the vertical lines. This setting is only available for the Automatic License Plate Recognition Peripheral video analytic.
Maximum slant	This field displays the maximum slant of the vertical lines. This setting is only available for Automatic License Plate Recognition Peripheral video analytic.
Minimum slope	This field displays the minimum slope of the horizontal lines. This setting is only available for Automatic License Plate Recognition Peripheral video analytic.
Maximum slope	This field displays the maximum slope of the horizontal lines. This setting is only available for Automatic License Plate Recognition Peripheral video analytic.

Advanced

The advanced settings are visible when the simple mode is off.

Warning: Changing the advanced settings can adversely affect the performance of the video analytic.


Setting	Description
Minimum Plate Length	Define the minimum number of characters that the Automatic License Plate Recognition video analytic must detect before it recognizes the text as a potential license plate.
Plate Dwell Time	Define the time (in seconds) that a potential license plate must be visible before the Automatic License Plate Recognition video analytic begins analyzing the potential license plate.
Queue Time	Define how much video the Automatic License Plate Recognition video analytic retains for analysis. Frames that fall outside of the queue time are ignored by the video analytic.
Analysis Timeout	Define how much time can elapse before the Automatic License Plate Recognition video analytic stops processing a license plate.
Plate Display Time	Define how long the Automatic License Plate Recognition video analytic displays the license plate decoration in the Senstar Symphony Client interface.
Plate Look Time	Define the time (in seconds) that the Automatic License Plate Recognition video analytic spends analyzing the license plate. During this time, the video analytic records all the characters that it recognizes (for example, the video analytic might detect a character as multiple similar characters as the license plate moves through the scene). After the time elapses, the video analytic selects and reports the best result. However, all results that the video analytic detects are saved to the database. If you set this value to 0 (zero), the video analytic reports the first result that it detects.
Import XML	Click this button to import a configuration XML file.
Export XML	Click this button to export the configuration XML file.
Show XML	Click this button to display the configuration XML.