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Character Extraction of Car License Plates using RGB Color Information and Fuzzy Binarization  

김광백 (신라대학교 컴퓨터공학과)
김문환 (신라대학교 자동차기계공학과)
노영욱 (신라대학교 컴퓨터교육과)
Abstract
In this paper we proposed the novel feature extraction method that is able to extract the individual characters from the license plate area of the car image more precisely by using the RGB color information and the fuzzy binarization newly proposed. The proposed method, first, extracts from the original image the areas that the pixels with the colors around the green are concentrated on as the candidate areas of the license plate, and selects the area with the most intensive distribution of pixels with the white color among the candidate areas as the license plate area. Second the noises of the license plate area should be removed by using 34{\times}$3 Sobel masking, and the fuzzy binarization method are proposed and applied to the license plate area to generate the binarized image of the license plate area. Lastly, the application of the contour tracking algorithm to the binarized area extracts the individual characters from the license plate area. The experiment on a variety of the real car images showed that the proposed method generates the higher rate of success for character extraction than the previous methods.
Keywords
RGB color information; Fuzzy binarization; Car plate recognition; Code extraction;
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