License plate recognizer

1
License plate recognizer

• Final project cs 585
• Jochen Dieckfoss
• 05/01/03

2
overview

• Motivation
• Method
• Results
• Problems
• Conclusion
• Questions

3
motivation

• Identifying license plates by matching them with
  images taken for example by traffic cameras.
• Might be used to track stolen cars or suspects

4
methods

• Filtering images
• Template matching with Normalized Correlation
  Coefficient

5
Constraints

• Current Massachusetts license plates
• Only digits no letters
• Width of license plate 200 pixels

6

Results
7
Results cont.
8
Results cont.
9
Problems

• Doesnt recognize deformed plates
• Some matches are inaccurate

10
Conclusion

• Most problems can be improved by changing
  threshold

11
Questions

• ???