AUTOMATIC NUMBER PLATE RECOGNITION

1. SREE VAHINI INSTITUTE OF
SCIENCE AND TECHNOLOGY
AUTOMATIC NUMBER PLATE RECOGNITION
G.ANUSHA
13MG1A0452
III B-TECH ECE -B

2. DEFINITION
• Automatic number recognition is a technology
that uses optical character recognition on images
to read vehicle registration plates .

3. Anpr technology consists
ALR(as
vehicle)
Web camera
capturing conditioning
detection
segmentation identification
save
Parallel port
& display
result

4. ANPR TECHNOLOGY TYPES
• ANPR engine: It can recognize the number plate
directly from images stored in a hard ware.
Images are taken by external connected cctv or
cameras.
• ANPR all in 1 equipment: It incorporates all the
hardware to capture the images &to recognize
the number plate. RECOMMENDED to obtain
high reliability.

5. Why all in 1 equipment is more
reliable
• ANPR integrates directly in the housing of
camera, the processor, the communication and
the power supply.
• Benefits:
More simple
Modular architecture
Installation & startup is easier
Reduces cost
Wiring reduces
Maintenance reduces

6. How does ANPR works
Detection
of vehicle
Capture of
images
Process of
recognition

8. Detection of vehicle
To take image of
vehicle at right time
3 kinds of trigger
control exits:
Hardware trigger
Software trigger
free flow

9. CAPTURE OF IMAGES
CAMERAS ARE OF 2 TYPES
Interlace camera:
Capture first uneven lines &
later even lines
PROGRESSIVE CAMERA:
Capture of images at once

10. Reflections in camera
Plane surface Vehicle number plate
• Angle of incidence
• Angle of reflection
• White light scattered in all
directions
• Light reflected back to light
source

11. Process of recognition
i.e,ANPR software
• Software consists of algorithms to satisfy :
To locate & to isolate the number plate in the
image
To correct he brightness & the contrast of
number plate
To separate each character of number plate
To recognize each character of number plate

12. ADVANTAGES
• Recovering stolen cars.
• Identifying drivers with an open warrant for
arrest.
• Catching speeders
• Determining what cars do and do not belong in a
parking garage

13. Anpr applications
• Car parks
• Traffic control
• Access control
• Calculate average speed control
• Urban toll payment
• Red light control
• Traffic optimization