Traffic
Contents
Traffic
Dahua’s License Plate Recognition cameras automatically capture vehicle license plate images, and recognize license plate numbers and letters
During playback, an operator can perform a license plate search by time and date to view thumbnail images of all plates captured during the specified time period, or they can enter a license plate number to search for vehicles recorded with that plate.
Instructions
DSS
Troubleshooting
- ITC237 Overexposure / Image Issues
- License Plate Recognition Issues (Not Capturing, Low recognition Rate, problems identifying plate)
- Insufficient Power ITC237-PU1B-IR
Manuals
Installation
This section covers recommendations for physical installation of the device - including pole distance, height, and camera angle.
The camera can be installed in the center of lanes or on the side , with different recommended distances for mounting.
Mounting height and the best distance to capture:
| Installation Method | Camera Height | Lane Width | Snapshot Distance (min, max) | Best distance to capture |
|---|---|---|---|---|
| ITC237-PW6M | 3m | 3.5m | 7-14m | 9-12m |
| 4m | 3.5m-7m | 8-16m | 14-16m | |
| 5m | 3.5m-7m | 9-18m | 14-18m | |
| 6m | 3.5-7m | 10-30m | 25m |
Center
If the camera is installed in the center of the lane, the relationship between the installation height h and the capture distance x is X≥1.7*H.
For example, in the case of 6m height in the standard scheme, the minimum capture distance is 10.2m.
- The camera is installed in the center of the scene
- The pole is 6 meters high
- The figure below shows a 2 lane installation
Side
If the camera is installed in the side of the lane, the relationship between the installation height h and the capture distance x is X≥1.7*H.
- The camera is installed on the right side of the scene
- The pole is 6 meters high
- The figure below shows a 2 lane installation
Limitation
- ITC devices do not have motion detection
- ITC do not support substream
Tips & Suggestions
- 120x50 pixels needs from example photo
- 5 degree angle or less
- Green Line =
- Red Box =
- Yellow Box =
- Gain = License Plate Reflection
NVR Compatibility
DHI-ITC237-PW6M-IRLZF1050 and DHI-ITC215-PW6M-IRLZF-B integrate with all Dahua NVR models except the following:
- N41B1P, N41B2P
- N41C1P, N41C2P
- N42B1P, N42B2P, N42B3P
Videos from the Lab
| Characters | State | Example Snapshot | Example LP Snapshot | Pixel Density | Possible Issues |
|---|---|---|---|---|---|
| 2PDP714 | California | 
|
|
208x96 | None |
| 3HLM253 | California | 
|
|
208x80 | None |
| 8SJB | Missouri | 
|
Error creating thumbnail: Unable to save thumbnail to destination
|
160x96 | *Special Character in License Plate |
| 147F | Illinois | N/A License Plate Not Recognized by Camera | N/A License Plate Not Recognized by Camera | N/A | 160x96
|
License Plate Recognition
| Model | Description | Focal Length | Pixel |
|---|---|---|---|
| DHI-ITC237-PW6M-LZF1050 | Long Range Access ANPR Camera |
10 mm - 50 mm | 2 MP |
| DHI-ITC237-PW6M-IRLZF1050 | |||
| DHI-ITC237-PW6M-LZF1050-B | |||
| DHI-ITC237-PW6M-IRLZF1050-B |
