基于纹理梯度的文档图像的倾斜校正方法

文档图像的倾斜校正在光学字符识别以及文档理解系统研究中有着重要的意义,国内外学者提出了很多实现方法,但各种方法都存在一定的局限性.通过对基于Hough变换和投影的倾斜校正方法的分析,提出了一种基于文档图像纹理方向的倾斜校正方法:文档图像中的文本纹理整体表现出一定的方向性,使文本图像能保持水平,通过纹理方向性分析,找出纹理的主要方向,进而求得文档的倾斜角度.通过一个复杂版面的二值文档图像的检测校正实验表明,方法提高了倾斜校正的校正范围,而且具有较好的有效性和鲁棒性.

A Document Image Skew Detection Method Based on Texture Gradation

The document image skew detection is important for the study of OCR and document Image understanding.Many methods are proposed,and there are some problems in these methods.The paper studies the skew detection method based on Hough transform and projection and presents a new document image skew detection method.By analyzing the direction of texture,the main direction can be found.Sequentially,the skew angle can be got.The document image's texture has a certain direction.The experiment,in which a complicated ...