Ⅰ Answers to common LPR questions
Q:
How do I know what the version of LPR? What is the difference between them?
A:
Jump to Configuration→System→Maintenance→System Maintenance and Check Software Version. Takes 45.8.0.1-LPR_EU-r1 as an example, LPR_EU is the version of LPR for this camera. Possible LPR versions are LPR1, LPR2, LPR3, LPR4, LPR_EU, LPR_AM, LPR_ME and LPR_AP.
Note:
Ø Different countries and regions have corresponding versions of LPR, see below for details:
LPR Version | Country/Region | |
Traditional OCR Algorithm | LPR1 | Algeria, Angola, Australia, Brazil, Canada, Chile, Hong Kong, India, Indonesia, Iran, Iraq, Ireland, Israel, Japan, Korea, Macau, Malaysia, Saudi Arabia, Singapore, South Africa, Taiwan, Thailand, Uzbekistan, Vietnam. |
LPR2 | A general purpose algorithm for alphanumeric license plate. | |
LPR3 | Only for Korean license plate recognition. | |
LPR4 | North America (USA, Canada, Mexico); GCC (Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United Arab Emirates). | |
Deep Learning LPR Algorithm (Continue to be updated...)
| LPR_EU | Be used for European license plate and also available as a general purpose algorithm for alphanumeric license plate. |
LPR_AM | Be used for the Americas license plate. For now, it supports Brazil, Canada, Mexico, Chile, Ecuador, Argentina and Uruguay. | |
LPR_ME | Be used for Middle East license plate. For now, it supports Iran and South Africa. | |
LPR_AP | Be used for Asia Pacific license plate. For now, it supports Australia, India, Japan, Korea, Thailand, Vietnam, Singapore, Vietnam, Malaysia, Philippines, Israel and New Zealand. | |
When both types of algorithms support a country/region, we prefer to use the deep learning LPR algorithm.
Ø How well Milesight LPR is working around the world:
Demo | YouTube |
Milesight LPR Demo - Radar Camera in Europe | |
Milesight LPR Demo-North America (Canada, USA and Mexico) | |
Milesight LPR Demo-South America (Brazil, Private & Commercial Vehicles) | |
Milesight LPR Demo-Asia (Korea, Japan and Turkey) | |
Milesight LPR Demo-Middle East (UAE, GCC Countries) | |
Milesight LPR Demo - Radar Camera in Taiwan Region | |
Milesight LPR Demo - Radar Camera High Performance | |
Introducing Wiegand Protocol Plus Milesight ANPR Solution | |
Introducing Milesight Intelligent Traffic Solutions | |
Introducing Milesight Indoor/Outdoor Parking Management Solution |
Ø How to set the LPR function:
LPR Version | Troubleshooting |
https://milesight.freshdesk.com/a/solutions/articles/69000640021 | |
How to set LPR1? | https://milesight.freshdesk.com/a/solutions/articles/69000797908 |
How to set LPR2? | https://milesight.freshdesk.com/a/solutions/articles/69000797905 |
How to set LPR3? | https://milesight.freshdesk.com/a/solutions/articles/69000797904 |
How to integrate third-party LPR Algorithm into Milesight Network Camera? | https://milesight.freshdesk.com/a/solutions/articles/69000797724 |
How to Set Radar AI LPR Camera? | https://milesight.freshdesk.com/a/solutions/articles/69000797257 |
Q:
What is recommended installation for AI LPR camera?
A:
* The horizontal and vertical offset angles need to be less than 30°. And the rotation tilt angle needs to be less than 5°. At the same time, adjust the appropriate focal length to ensure that the license plate will not be too large or too small in the frame.
* For Radar AI LPR Camera, there is a video of Radar Installation & Configuration Tutorial: https://www.youtube.com/watch?v=u88gNAdrJnM&t=61s
Q：
What is the most appropriate size of license plates in the frame? Or what are the requirements for License Plate Width Pixels to achieve the best LPR results?
A：
LPR Version | Pixels | |
LPR_EU LPR_AM LPR_ME LPR_AP | 80~160 | |
LPR2/4 | 130~300 | |
LPR3 | ＞150 | |
LPR1 | Brazil | 110~150 |
Iran | 130~170 | |
South Africa | 110~150 | |
Indonesia | 110~150 | |
India | 120~150 | |
Hong Kong | 110~150 | |
Singapore | 110~140 | |
Korea | 120~150 | |
Japan | 90~130 | |
Vietnam | 110~150 | |
Macau | 110~150 | |
Australia | 110~150 | |
Thailand | 110~150 | |
Saudi Arabia | 120~150 | |
Chile | 110~150 | |
Ireland | 120~160 | |
Malaysia | 90~140 | |
Uzbekistan | 120~160 | |
Q：
What is the relationship between capture distance, lane coverage and field of view? Or How do I choose the lens to match the distance I want to monitoring.
A:
Distance | ~5m | ~10m | ~20m | ~30m | ~50m |
1 lane (＜4m) | 33°~44° | 17°~23° | 9°~11° | 6°~8° | 3°~6° |
2 lanes (＜8m) | 62°~77° | 33°~44° | 17°~23° | 11°~15° | 7°~9° |
Q:
What’s the meaning of "4" at the beginning of the LPR image file name? Could it be removed?
A:
To distinguish between plate snapshot and full image, there will be a “4” at the beginning of full image file name. It cannot be removed. If you think it will affect your identification of plate number or time, you can jump to LPR→Settings→Advanced to adjust the file name sorting.
Q:
As a simple front-end solution, does LPR camera always need an SD Card to work? How does the camera work without an SD card?
A:
License Plate Recognition, Black and White List Event, Live View Result Display and Back-end Post can all be performed without an SD card. However, without an SD card, the camera will not record any snapshot or video. Therefore, you cannot search or export LPR logs with images and videos but only text information. And it can store up to 10,000 text LPR logs.
Q:
What protocol does Milesight AI LPR Camera support to transfer data to back-end software?
A:
TCP, HTTP Get Method, HTTP Post Method and Metadata via RTSP. For more information on compatibility, please refer to 42.Milesight-Troubleshooting-Integration between LPR Camera and NVR(VMS).
Q:
What is the maximum number of license plate lists that can be stored on the camera, NVR and VMS? Are they related to each other?
A:
Up to 1,000 license plate lists can be stored on Camera side. Up to 10,000 license plate lists can be stored on NVR and VMS side. They are not related to each other. If you want to synchronize them, you can use their import and export function.
Ⅱ About Milesight Intelligent Traffic
Featuring powerful LPR functions, Milesight Intelligent Traffic Solution is suited for a variety of applications scenarios that require high-performing, easy-to-use and scalable traffic system. The robust solution consists of traffic violation solution, traffic flow control, traffic and parking lot management, meeting the most needs of traffic planning and management.
* For more details about Milesight Intelligent Traffic Solutions, you can refer to: https://www.youtube.com/watch?v=k7boI86gwJI
* For more details about the recommended models of Milesight Intelligent Traffic, you can refer to: https://www.milesight.com/product/intelligent-traffic
1. Milesight Road Traffic Management
Intelligent Cameras for Road Traffic Monitoring
* Recommended Models:
2. Milesight Entrance & Exit Management
Leave Safety and Efficiency in Good Hands
* Recommended Models:
3. Milesight Parking Management
Make Parking Easy and Smart
* Recommended Models:
·AIoT Indoor Parking Management Suite
·AI Outdoor Parking Management Camera
Ⅲ Coming Soon
There are a number of noteworthy new features being explored and implemented soon, as follows:
* Vehicle Counting based on Vehicle Type
* Vehicle Brand Recognition
* Illegal Parking Detection
* Specific Lane Management
* Intersection Violation Detection
* And so on...