TW200731144A - License plate recognition method and system for moving vehicles - Google Patents
License plate recognition method and system for moving vehiclesInfo
- Publication number
- TW200731144A TW200731144A TW095104491A TW95104491A TW200731144A TW 200731144 A TW200731144 A TW 200731144A TW 095104491 A TW095104491 A TW 095104491A TW 95104491 A TW95104491 A TW 95104491A TW 200731144 A TW200731144 A TW 200731144A
- Authority
- TW
- Taiwan
- Prior art keywords
- license plate
- moving vehicles
- characters
- recognition
- detected
- Prior art date
Links
Landscapes
- Traffic Control Systems (AREA)
- Character Input (AREA)
Abstract
A license plate recognition system for moving vehicles on the road is disclosed. The system includes the following subsystems: motion edge detection, image extraction of moving vehicles, license plate locating, tilt plate correction, character segmentation and recognition. Motion edges are detected by calculating the image difference between adjacent frames. If enough amount of difference is detected, moving vehicles are assumed in the frames and the license plate locating procedure is activated. The license plate could be identified by finding vertical and horizontal projections in the area with highly concentrated edge densities to find out the precise location of the license plate. A connected component approach is used to extract characters from the license plate. If characters look blurring, we use low pass and sharpening filters to maintain the integrity of characters. In the character recognition part, we take the Back-Propagation Neural (BPN) Network as our principle method, and Self-Organized Map (SOM) as the auxiliary method. They are combined through a voting mechanism. In this way, we could achieve better recognition performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW095104491A TW200731144A (en) | 2006-02-10 | 2006-02-10 | License plate recognition method and system for moving vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW095104491A TW200731144A (en) | 2006-02-10 | 2006-02-10 | License plate recognition method and system for moving vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW200731144A true TW200731144A (en) | 2007-08-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW095104491A TW200731144A (en) | 2006-02-10 | 2006-02-10 | License plate recognition method and system for moving vehicles |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TW200731144A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183425B (en) * | 2007-12-20 | 2010-06-09 | 四川川大智胜软件股份有限公司 | Guangdong and Hong Kong license plate locating method |
| TWI381321B (en) * | 2009-04-30 | 2013-01-01 | Ind Tech Res Inst | Method for image recombination of multiple images and identifying image and system for identifying image and outputting identification result |
| TWI384408B (en) * | 2009-04-30 | 2013-02-01 | Ind Tech Res Inst | Method and system for identifying image and outputting identification result |
| CN103123684A (en) * | 2011-11-18 | 2013-05-29 | 江南大学 | License plate location method |
| TWI494867B (en) * | 2012-03-26 | 2015-08-01 | Mitsubishi Heavy Ind Ltd | Vehicle number data processing system, method of processing vehicle number data, vehicle number data processing device, program, and recording medium |
| TWI677826B (en) * | 2018-09-19 | 2019-11-21 | 國家中山科學研究院 | License plate recognition system and method |
| CN112528988A (en) * | 2020-11-03 | 2021-03-19 | 创泽智能机器人集团股份有限公司 | License plate angle correction method |
-
2006
- 2006-02-10 TW TW095104491A patent/TW200731144A/en unknown
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183425B (en) * | 2007-12-20 | 2010-06-09 | 四川川大智胜软件股份有限公司 | Guangdong and Hong Kong license plate locating method |
| TWI381321B (en) * | 2009-04-30 | 2013-01-01 | Ind Tech Res Inst | Method for image recombination of multiple images and identifying image and system for identifying image and outputting identification result |
| TWI384408B (en) * | 2009-04-30 | 2013-02-01 | Ind Tech Res Inst | Method and system for identifying image and outputting identification result |
| US8391560B2 (en) | 2009-04-30 | 2013-03-05 | Industrial Technology Research Institute | Method and system for image identification and identification result output |
| US9286533B2 (en) | 2009-04-30 | 2016-03-15 | Industrial Technology Research Institute | Method for image recombination of a plurality of images and image identification and system for image acquiring and identification |
| CN103123684A (en) * | 2011-11-18 | 2013-05-29 | 江南大学 | License plate location method |
| TWI494867B (en) * | 2012-03-26 | 2015-08-01 | Mitsubishi Heavy Ind Ltd | Vehicle number data processing system, method of processing vehicle number data, vehicle number data processing device, program, and recording medium |
| TWI677826B (en) * | 2018-09-19 | 2019-11-21 | 國家中山科學研究院 | License plate recognition system and method |
| CN112528988A (en) * | 2020-11-03 | 2021-03-19 | 创泽智能机器人集团股份有限公司 | License plate angle correction method |
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