A 3-D transformation to improve the legibility of license plate numbers.
In this paper, a novel three-dimensional transformation method for vehicle license plate number recognition is proposed. This method provides an efficient solution to normalize skew distorted vehicle license plate images. The Hough transform is used to estimate the license plate position and the normalization angle. After the three-dimensional transformation and normalization processes, the vehicle license plate numbers are recognized easily. Real vehicle license plate images are used to show the capability of the proposed method. The provided method is also useful for other skewed writings, such as the text printed on a suspect's shirt.
Wen
Che-Yen
CY
Department of Forensic Science, Central Police University, Taoyuan, Taiwan. cwen@sun4.cpu.edu.tw
Yu
Chiu-Chung
CC
Hun
Zi-De
ZD