Hanwha Techwin WISENET Road Al LPR ANPR Camera User Guide

Techwin WISENET Road Al LPR ANPR Camera
User Guide

PRE-INSTALLATION

1.1 Choosing a Location
The LPR (License Plate Recognition)/ ANPR (Automatic Number Plate Recognition) Technology running on this camera will provide you with the best results when following the recommended installation constraints below.

Recommended
30 degrees Maximum Vertical Angle
Maximum Forward Distance depends on lens zoom, however should not exceed 20 m / 65.6 ft considering effective IR range (for PNO and PNV models).
Please consider using external IR for ranges above 20 m / 65.6 ft.

1.1 Choosing a Location (Continued)
FORWARD DISTANCE TABLES
The orange dots on the tables below are recommended installation measurements.
It is based in low speed less than 30km.
[PNO/PNV-A9081RLP]

• Daytime condition with built in IR.
• PNB-A9001LP parameters depends on lens & external IR.

1.1 Choosing a Location (Continued)

Camera in 4K mode can cover up to 3 road lanes.
The FullHD mode can cover up to 2 lanes.
Normally, setting recognition zone (see orange frame below) in lower half of camera view is sufficient and favours app performance.
Best results are achieved when single row number plate width has fit the criteria. Greater width may affect performance.

All the license Plate that are meeting the pixel criteria as below will be recognized in the selected area.

• 130-300 pixels for regular EU plates
• 80-300 pixels for US plates without stacked symbols (small ones)
• 160-300 pixels for US plates with stacked symbols

Color coded pixel counts are available in the settings section of Road AI.

INSTALLING AND POSITIONING CAMERA

2.1 Camera Installation
NOTE: Refer to PNO-A9081RLP, PNV-A9081RLP or PNB-A9001LP installation guide and follow the installation instructions.

2.2 Adjust for Plate “Rotation” Angle
For best results, check the angle of your plate compared to the horizontal angle and rotate the camera to less than 5° as shown below (Recommended Angle(s).

NOTE: Refer to the “show plate grid” section available in Wisenet Road AI settings for assistance.

2. 3 LPR(ANPR)/ MMCR Specification

| | |
---|---|---|---
LPR(ANPR) CAMERAS| PNV-A9081RLP| PNO-A9081RLP| *PNB-A9001LP ( with 50mm lens)**
LPR Usage Conditions| Community Traffic| Parking Application| City Traffic
Speed Description| Moderate Speed| Low speed| Regular Speed
Lane Coverage| 1 lane (3.6m/12ft Wide) (with built in IR)| 1 lane (3.6m/12ft Wide) (with built in IR)| Up to 2 lanes (5m/18ft  Wide)
Speed limit| Up to 70kmh (45mph)| Up to 40kmh (25mph)| Up to 100kmh (65mph)
Min. Forward Distance| 12m (38ft)| 10m (33ft)| 16m (52ft)
Max. Forward Distance| 12m (40ft)| 13m (45ft)| 36m (120ft) (with Ext. IR)
Max. Horizontal Angle| 25°| 30°| 25°
Max. Vertical Angle| 25°| 30°| 25°
Horizontal Offset| Up to 5m (18ft)| Up to 7m (24ft)| Up to 7m (24ft)
Camera Height| Up to 5m (18ft)| Up to 7m (24ft)| Up to 7m (24ft)
Vehicle Recognition| Make : 70+ Makes
Model : 600+ models
Color : 11 colors| Make : 70+ Makes
Model : 600+ models
Color : 10 colors| Make : 70+ Makes
Model : 600+ models
Color : 11 colors

CONFIGURING YOUR CAMERA

NOTE: There is no default user name and password to access the camera setting,

1. Please make your own user name and password at the first instance when you access the camera settings.
2. Make sure to set correct date and time for the camera before going in to any additional settings.

3. 1 Field of View
The below steps you will perform in the Wisenet camera configuration webpage

1. Configure camera so left and right are correct, not mirrored.
2. Set camera zoom to capture license plate
3. Adjust camera view angle so plate passes through the middle of the image.

3. 2 Configure Initial Camera Settings
For proper operations, please, check and set properly:

• Camera Date Time ( page 9)
• IP settings ( page 10)
• SD card storage ( page 13)
• Camera exposure and focus ( pages 14~15)

SSDR, WDR, DIS, Defog, AGC and anti-flickering features are good for human eye but affect computer vision performance and therefore setting these to the least possible effect or turning off strongly advised.

3. 2 Configure Initial Camera Settings (Continued)
[Date and Time]

Choose A Timezone and set Use daylight saving time as appropriate.
Set B date and time or opt to synchronize with your PC or NTP server.
NOTE: Wisenet Road AI app relies on these settings and if these are not set properly you may not see events in Wisenet Road AI app and events delivered to the outer systems may not contain proper timestamps.

3. 2 Configure Initial Camera Settings (Continued)
[IP, DNS, Ports]

Proper IP, DNS and ports setting are important for:

• NVR and other integrations
• outside LAN access if required

NOTE: Reboot the camera whenever IP address gets changed.

3. 2 Configure Initial Camera Settings (Continued)
[Go to App]
Please go to App in camera open platform section.

To run the Wisenet RoadAI app, select the Open platform menu and click the A Go App button in the Application name field.

3. 2 Configure Initial Camera Settings (Continued)
[Go to App] (Continued)
Go to Wisenet Road AI application tab and select “Settings” from the pull down menu.

Select the A correct Region from the selection. Default settings will be “Europe”.
If you are in any other regions other than the default (Europe) region, pull down the option and select the correct region/country that matches your usage.
Click B to save the settings.
In the same “Settings” section, you can also choose to have the C Recommend setting applied.
Recommended setting is only for you as a guide which is based on stop and go settings. Most important settings are the shutter speed for fast/slow moving vehicles.
Change the settings based on your install location.

3. 2 Configure Initial Camera Settings (Continued)
[microSD card]
Your camera is supplied with micro SD card.

SD-card is managed by the Wisenet RoadAI application and no user interaction needed.
Please check the B SD-Card status in the A ABOUT section of the Wisenet RoadAI app.
Change the micro SD card if you see Error status.

3. 2 Configure Initial Camera Settings (Continued)
[Exposure adjustments]
Use the recommended settings from the Wisenet Road AI application in most cases. But if you need to manually adjust here are the most common settings that affect the LPR performance.

A Sensor: 25-30 fps
B SSDR: Off
C White balance: AT W
D Back light: Off (try other backlight options only if camera gets blinded by headlights in the night)
E Exposure:

• minimum shutter speed : 1/300
• maximum shutter speed : 1/700
• preferred shutter speed : 1/500
• Anti flicker : Off
• SSNR : Default
• AGC : Low

F Day/Night:

• Mode: Auto

G IR: manual
H Other settings: default

3. 2 Configure Initial Camera Settings (Continued)
[Exposure adjustments-Automatic Gain Control]

Automatic Gain Control can improve overall scene visibility notably. However, even at low setting AGC produces noise that can ruin license plate images, also lighter areas tend to bleach out. See illustrations to the left.

Start with turning AGC off. See the illustration to the left. Set AGC to low to improve plates visibility unless only other methods are helpful.
Adjust zoom so that real plate pixel width is at least 130px.
Consider adjusting recognition zone so it is closer to the centre of the frame to avoid IR vignette effect.
NOTE: Do not use WDR as it decrease the shutter speed and may blur the vehicles.

3.3 Simple Focus on Plate Read Area
A unique feature of this camera allows you to select the plate area and hit a button to perform a “Simple Focus” on this plate area.

1. From the Video & Audio menu, select Focus setup.
2. Click and drag to draw an area of focus where the license plate is displayed.
3. Click the Simple Focus button to initiate a focus operation on the user-specified area.

NOTE:
The focus setting of PNB-A9001LP is related to the lens type, and manual focus is activated when using a manual varifocal lens.
The area indicated is not stored. If you need to perform a new Simple Focus, please draw a new area on-screen. Set the focus to have plates in the proper pixel size.

• 130-300 pixels for regular EU plates
• 80-300 pixels for US plates without stacked symbols (small ones)
• 160-300 pixels for US plates with stacked symbols

3. 4 To measure pixel width of license/number plate

1. Spread or move license/number plate (cars) across the scene (see illustration on the left below) and take snapshots using web viewer capturing feature (Live ; Capture);
2. Use Plate Grid tool in the Settings tab of WisenetRoadAI and Freeze Frame feature to check whether plate fits the allowed range.
3. You can add an image from the Wisenet Road AI ; Settings ; Freeze frame to show the actual settings.

3. 5 Observing PROPER Installation
SCENE REQUIREMENTS :

License/number plate is
more than 130px in width| License/number plate is readable| Vertical angle is less than 30°| Tilt angle is less than 5°| Horizontal angle is less than 30°

• good proportion to the frame width
• well lit
• sufficient contrast
• acceptable tilt angle| • good proportion to the frame width
• perfect IR power
• sufficient contrast
• critical yet acceptable tilt angle
---|---

3. 5 Observing PROPER Installation (Continued)
POSSIBLE IR RESTRICTIONS:

The license/number plate is quite close to the frame boundary.
You may notice a vignette effect.

The license/number plate is closer to the centre of the frame.
The plate is lit much better.

Pay special attention to IR vignette effect (see illustration on the left) when setting up recognition zone. The closer to the center the more even lighting is.
Also in this particular case real pixel width of the license/number plate is critically small.
The Automatic Gain Control effect will be illustrated in camera exposure settings section.

3. 6 Examples of IMPROPER Installation

Too small (less than 130px wide) Tilt angle exceeds 5°

Depth of field is insufficient to cover foreground license plates. Adjust the lens settings.| Improper focus settings.
Adjust the lens.| Blurry image due to long exposure.
Fix the shutter speed to obtain sharper picture.

3. 6 Examples of IMPROPER Installation (Continued)
Exposure faults

Too much light. Either adjust the iris or shutter speed.
Night time: dim the IR or set AGC to Low.

Insufficient light. Adjust exposure settings or provide additional lighting.

For more information visit us at
Hanwha-Security.com

Head Office
6, Pangyo-ro 319beon-gil, Bundang-gu, Seongnam-si,
Gyeonggi-do, 463-400 Rep. of KOREA
Tel : +82.70.7147.8753
Fax : +82.31.8018.3740
http://hanwha-security.com
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DESIGN AND SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
Under no circumstances, this document shall be reproduced, distributed or changed, partially or wholly, without formal authorization of Hanwha Techwin Co.,Ltd.

• Wisenet is the proprietary brand of Hanwha Techwin, formerly known as Samsung Techwin.

References

• Hanwha Vision - Global Vision Solution Provider

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