小波的文本图像区分及其在文献信息数字化中的应用  

Applying image classification using wavelets to digitization of document information

作　　者：陈杰[1] 孙忠贵[2] 周书锋[2] 

机构地区：[1]聊城大学图书馆,山东聊城252059 [2]聊城大学数学科学学院,山东聊城252059

出　　处：《智能系统学报》2010年第2期185-188,共4页CAAI Transactions on Intelligent Systems

基　　金：聊城大学青年教师科研基金资助项目(X0810029)

摘　　要：目前,OCR技术对文本图像区域自动区分的效果还不够精确,进而影响了OCR技术在文献信息数字化过程中的工作效率.针对这一局限,提出了一种基于小波的文本图像区分方法.方法首先对扫描区域进行小波分解,然后使用分解系数构建分解能量,最后依据分解能量大小对文本图像进行自动区分.结果表明,该方法对文本图像的区分效果较好,减少了在使用OCR技术进行文献信息数字化时的人为干预,有利于提高文献信息数字化过程的自动化水平.最后通过实验仿真验证了该方法的有效性.The accuracy of optical character recognition （OCR） technology in distinguishing between text areas and image areas has remained relatively low. Unfortunately this reduces the efficiency of OCR in digitization of document information. After analyzing the main steps of OCR applied to a digital library, the authors evolved an image classification algorithm based on wavelets. Decomposing the scanning area with wavelet transform was the first step in the algorithm. The energy value of the area could then be derived from wavelet coefficients. The task of distinguishing between text and images was accomplished by analyzing their energy values. The algorithm proved fast and automatic, characteristics increasing the efficiency of the digitization of document information. It was clear that the simulation verified the new algorithm＇s feasibility.

关 键 词：数字化文献 OCR 小波 文本图像 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]