Page skew detection and correction is also an impassable part of preprocessing. An innovative approach is presented to detect skew angle, skew detection based on image logic operation and LMS.

• 针对扫描图像可能产生的倾斜，论文提出了一种基于图像的逻辑运算和最小二乘法的页面倾斜检测方法：首先定义了一系列逻辑运算算子；