Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)
Current Result Document :
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¿µ¹®Á¦¸ñ(English Title) |
Recognition Performance Enhancement by License Plate Normalization |
ÀúÀÚ(Author) |
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Do-Hyeon Kim
Min-Kyung Kang
Eui-Young Cha
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¿ø¹®¼ö·Ïó(Citation) |
VOL 12 NO. 07 PP. 1278 ~ 1290 (2008. 07) |
Çѱ۳»¿ë (Korean Abstract) |
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¿µ¹®³»¿ë (English Abstract) |
This paper proposes a preprocessing method and a neural network based character recognizer to enhance the overall performance of the license plate recognition system. First, plate outlines are extracted by virtual line matching, and then the 4 vertexes are obtained by calculating intersecting points of extracted lines. By these vertexes, plate image is reconstructed as rectangle-shaped image by bilinear transform. Finally, the license plate is recognized by the neural network based classifier which had been trained using delta-bar-delta algorithm. Various license plate images were used in the experiments, and the proposed plate normalization enhanced the recognition performance up to 16 percent.
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Å°¿öµå(Keyword) |
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Delta-bar-delta ¾Ë°í¸®Áò
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