期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2013
卷号：4
期号：6
页码：879-882
出版社：TechScience Publications
摘要：A methodology for extracting text from Video obtaining from frames, Text that appears in these images contains important and useful information. Text extraction in images has been used in large variety of applications such as mobile robot navigation, document retrieving, object identification, detection the vehicle license plate, etc. In this paper, we employ discrete wavelet transform (DWT) for extracting text information from complex images. The input image may be a color image or a grayscale image. If the image is color image, then preprocessing is required. For extracting text edges, the sobel edge detector is applied on each sub image. The resultant edges so obtained are used to form an edge map. Morphological operations are applied on the processed edge map and further thresholding is applied to improve the performance
关键词：Edge detector; discrete wavelets transform (DWT);Image segmentation; Text extraction and Text recognition.
