Efficiently locating vehicle license plates based on vertical line detection

機構典藏 > College of Engineering > Graduate Institute & Department of Computer Science and Information Engineering > Proceeding > Item 987654321/37475

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Title:	Efficiently locating vehicle license plates based on vertical line detection
Authors:	Horng, Wen-bing;Wu, Mong-tsung;Fan, Chun-hai
Contributors:	淡江大學資訊工程學系;淡江大學運輸管理學系
Date:	1999-08-22
Issue Date:	2010-01-11 13:32:19 (UTC+8)
Abstract:	A fast method for locating vehicle license plates is proposed in this paper. This approach is primarily based on the observations that the intensity contrast between license plate background color and symbol color is high and that symbol edges are clustered in the plate area. A simple edge detection method based on first derivatives is applied to a car image such that the binary image containing only vertical edges is obtained. Then possible plate regions could be located from the horizontal and vertical projections of the binary image. No preprocessing, such as image enhancement and noise filtering, is required. In addition to its simplicity and fastness, the proposed method is less sensitive to illumination changes of the plate. The proposed method was experimented with 117 diverse car images on a Pentium-133 processor. The system successfully located 116 license plates in 0.2 second on an average.
Relation:	第十二屆電腦視覺、圖學暨影像處理研討會論文集(CVGIP99)，頁728-733
Appears in Collections:	[Graduate Institute & Department of Computer Science and Information Engineering] Proceeding [Graduate Institute & Department of Transportation Management] Proceeding

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