ANPR
© Nedap AVI, P.O. Box 103, NL-7140 AC GROENLO Page 12 of 27
5.2.3 PLATE READER
The ANPR system is capable of real time OCR processing grabbed images. Up to 4 countries number plates can
be simultaneously read. It is necessary to update the ANPR firmware if the user wants to change the countries
the system should read.
To view the countries the ANPR system is capable of reading, please access the web server and click the
DeviceInfo icon: go to the line that shows the firmware version, as in the example below:
Example:
Firmware version = VEGA ACCESS 7.85 NLD-EU
The Plate Reader page contains the following fields:
Plate Locator
This section contains the coordinates of the number plate search area in the image. The search window is
displayed with a red border on the live image in the Camera OCR page. By setting the search window, the user is
allowed to exclude image zones where, supposedly, no number plate will ever be detected or to exclude image
zones where plate reading needn’t be executed.
Win MinX Pixel: The upper left X-coordinate of the plate searching window. See picture below.
Win MinY Pixel: The upper left Y-coordinate of the plate searching window. See picture below.
Win MaxX Pixel: The lower right X-coordinate of the plate searching window. See picture below.
Win MaxY Pixel: The lower right Y-coordinate of the plate searching window. See picture below.
Sensitivity: This value may range from 2 to 8. Typically, used values are 4, 5 and 6. Higher
Sensitivity values cause higher recognition sensitivity but also cause a higher chance
of wrong readings. It is recommended to avoid higher sensitivity values unless these
are absolutely necessary.
0
X
0
Y
Plate searching window
MinX MaxX
MinY
Max
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