提出了一种基于波导多层光卡数据页图像的截取算法，以解决准确读取光卡信息和最终译码的关键问题。该算法是在一个预处理的二值化图像基础上，依据梳状图的统计特性和数据页的图像纹理特征，对一个完整数据页的起始坐标和长宽进行估算，达到对光卡数据页的图像截取的目的。最后通过具体实例验证了基于波导多层光卡数据页的图像截取算法的有效性。

An interception algorithm based on the data page in the image of multilayered waveguide optical card is proposed to solve the key problem of reading optical cards information and ultimate decoding accurately in this paper. On the basis of the preprocessed binaryzation image, and according to the statistical characteristic of the comb-shaped chart and image texture features of the data page, this algorithm is aimed to intercept the image of the optical card data page by estimating the initial coordinates and length-width of a complete data page. Moreover, an instantiation is employed to verify the validity of the interception algorithm based on date page in the image of optical card.