关键词: 边缘检测, 倾斜校正, 号码定位, 字符分割, 最大连通区域

Abstract: In this paper, an edge detection combined with number distribution algorithm was proposed to locate the number area, and a projection-maximal connected region algorithm was proposed to segment characters. An improved mathematical morphology was used to extract the edge of gray image; the max connected region algorithm was used to figure out the skew angle for image skew correction. After that, number area could be located with the help of number location information. The maximal connected region algorithm was adopted to filter block noise, and projection feature and width of character were used to segment characters. This method effectively overcomes the disturbance due to complex background, the depth of ink, stains and wear.

Key words: edge detection, skew correction, number location, character segmentation, maximal connected region