標題: Robust License Plate Detection in Nighttime Scenes using Multiple Intensity IR-Illuminator
作者: Chen, Yi-Ting
Chuang, Jen-Hui
Teng, Wen-Chih
Lin, Horng-Horng
Chen, Hua-Tsung
資訊工程學系
Department of Computer Science
公開日期: 2012
摘要: The functionality of video surveillance is significantly degraded by the low illumination and poor visibility under the nighttime environment. However, the demand for nighttime surveillance is no less than the daytime one because of the high incidence of accidents during night. The Infrared (IR) light source with fixed intensity works for only certain distance, resulting in the defect of underexposure/overexposure due to the object being too far from/close to the light source. In this paper an innovative idea is brought up that we use a multiple intensity IR-illuminator to enhance the effective distance of license plate detection. Based on the stroke width of the license ID, license plates are detected in the images under different illuminations and then the results are integrated into a synthesized high dynamic range image, in which the license plate regions and the background scene can be better visualized. Experimental results show that the proposed approach can effectively enlarge the monitored area in both depth and width, as well as enhance the security level of nighttime video surveillance.
URI: http://hdl.handle.net/11536/20349
ISBN: 978-1-4673-0158-9
期刊: 2012 IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE)
起始頁: 893
結束頁: 898
Appears in Collections:Conferences Paper