Vietnamese ALPR_System

An Automatic License Plate Recognition System for Vietnamese Plates

This system can detect and recognize 2 types of license plate in Vietnam, rectangle plates and square plates.

Abstract

• This system can detect and recognize license plates from images, videos and webcams.
• Within this project, the camera's position is fixed and only one car at a time can drive through the gate. Therefore, the system is only able to detect 1 plate per frame.

Method

1. Plate detection
   • Sobel X for detecting vertical edges followed by a morphological transformation.
   • Finding contours which satisfy the ratio of the plate to get the possible plates
   • Checking for characters on the possible plates found to assure it is a license plate.
2. Plate recognition
   • For character recognition, I used MobileNet_v1_0.5_128 as it was lightweight and suitable for real-time recognition.

Requirements

• python 3.6
• run pip install -r requirements.txt

Implementation

• run test.py for testing on a video.
• run test_image.py for testing on an image.

Result

Note

• You should play with these parameters: minPlateArea, maxPlateArea and ksize in cv2.getStructuringElement to implement successfully on your own case.