抄録
In case of the scanning document images, they are mostly the low-resolution images and the skew images. Many document images can be applied to a variety of pattern recognition area. The document images need image preprocessing including the process of rotation. In this study, we used of three rotation processing methods: one-pass method, two-pass method, and three-pass method, for the skew coordinate transforming of the document images. We compared the result images of three rotation methods and analyzed the time complexities of three rotation methods. In this paper, we took better results in the three-pass rotation method for the document images under the angle condition between one and fifteen. And the three-pass rotation method had better performance than the one-pass rotation method.
