基于打印字符分析的打印文件检验研究  

Printed character analysis based printed document examination

作　　者：邓伟[1] 罗小巧[1] 鄢煜尘[2] 陈庆虎[2] 

机构地区：[1]华中师范大学信息技术系,武汉430079 [2]武汉大学电子信息学院,武汉430079

出　　处：《计算机应用研究》2011年第12期4763-4765,4769,共4页Application Research of Computers

基　　金：中央高校自主科研基金资助项目

摘　　要：研究了基于打印字符图像分析的计算机打印文件检验,以快速鉴别生成打印文件的源打印机。鉴别过程包括打印文件图像采集、图像预处理、特征提取和匹配。用自行设计的装置采集打印文件图像,经过打印字符提取和识别,利用距离变换和方向直方图方法对不同打印文件中的相同字符进行匹配,来进行打印文件的源打印机认定。在有40台激光打印机的数据库中测试,打印文件鉴别实验准确率达到89.51%,证明了本方法的有效性。This paper presented a study on printed character image analysis based printed document examination in purpose of identifying the printer which created a suspect printed document. It was composed of printed document image acquisition, image preprocessing, feature extraction and matching. Designed an optical instrument for document image observation and acquisition under high resolution. It extracted and recognized printed characters in preprocessing. And applied text sensitive methods including distance transformation and direction histogram feature to printer identification. Experiments are carried out in a database including 40 LaserJet printers and an identification accuracy of 89.51% was achieved. The experimental results demonstrate the effectiveness of the proposed method.

关 键 词：打印文件检验 距离变换 方向直方图方法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]