Verification Test
After the HD LPR Capture Kit has been installed and the software has been configured correctly, a simple
verification test should be performed.
Important:
Before performing this test, ensure to block off a section of the road for safety purposes.
1. Park a vehicle in the center of the field of view.
2. The vehicle license plate text should be displayed in the image panel as an image overlay.
3. If the license plate does not appear or does not appear correctly, check the following:
a. Software is configured correctly. For more information, see
Configuring LPR in the ACC Software
on page 21.
b. The camera is mounted in a suitable location for the target distance. For more information, see
Site
Design
on page 7.
c. The license plate is horizontal in the image. For more information, see
Adjusting the Enclosure
on
page 19.
d. The license plate is bright compared to the rest of the scene.
e. There is contrast between the license plate background and the license plate characters.
4. Drive a vehicle through the field of view of the LPR camera and check that the license plate was read
correctly.
5. Review each frame of the vehicle passing through the field of view. The brightness of the license plate
should peak as the vehicle passes the center of the field of view.
6. Unblock the road and watch the LPR camera capture actual traffic. Run a License Plate Search with a
blank search term and wait until at least 100 search results are found. For more information about the
search function, see the
Performing a License Plate Search
on page 24.
7. Play the video over the search range and see if any license plates did not generate a result. License
plates are often rejected if:
l
The reflective coating is severely worn off.
l
The license plate is from a region with a different font.
8. Review the search results and compare them to the captured images. Incorrect results often result if:
l
The license plate is partially covered.
l
The license plate is dirty.
l
The license plate is a vanity plate.
NOTE:
Advertisements and other text on vehicles may be interpreted as license plates and generate
extra results.
Verification Test
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