面向票据的OCR识别算法研究与实现

Research and Implementation of Bill Oriented OCR Recognition Algorithm

随着对票据使用的不断增多,票据的存储、管理以及票据信息的查找,逐渐变得繁琐,给人们带来困扰。通过对票据中信息的识别,发现其中圆形印章中的字符并不能准确识别,针对环形字符以及印章中文字的准确识别进行研究,实现了面向票据的OCR识别算法。使用Canny算子边缘检测、Hough变换、极坐标变换、以及确定极坐标变换起点的算法等,实现了能够按照印章中文字排列的逻辑进行变换,并成功识别出印章中所含的文字内容。实验结果表明,对印章中文字内容识别的正确率达到83.84%。

With the increasing use of bills, the storage and management of bills and the search of bill information have become cumbersome and perplexing. Through the recognition of the information in the bill, it is found that the characters in the round seal cannot be accurately recognized. Aiming at the accurate recognition of the circular characters and the characters in the seal, an OCR recognition algorithm for the bill is realized. Using Canny operator edge detection, Hough transformation, polar coordinate transformation, and the algorithm to determine the starting point of polar coordinate transformation, the transformation can be carried out according to the logic of the text arrangement in the seal, and the text content contained in the seal can be successfully recognized. The experimental results show that the correct rate of text recognition in seal is 83.84%.