DataMatrix码的嵌入式识别算法  

Embedded Recognition of DataMatrix Code by Using Cross Correlation Matching Algorithm and Hough Transform

作　　者：王根源[1] 吴祥坤[1] 胡坤[1] 宋占伟[1] WANG Genyuan WU Xiangkun HU Kun SONG Zhanwei

机构地区：[1]吉林大学电子科学与工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2016年第3期419-426,共8页Journal of Jilin University（Information Science Edition）

基　　金：长春市物联网重大科技专项基金资助项目(2011144)

摘　　要：为从复杂的实际应用环境中分割Data Matrix码图像,提高解码准确率与速度,采用互相关图像匹配算法进行条码的初定位,并利用"金字塔分层"思想降低其运算量。利用改进后的Hough变换对定位后的图像进行"L"边界线段坐标的精确测定,从而完成解码前的准备工作。整个算法及解码流程在ARM9内核的S3C2440芯片搭载Linux系统下进行,结果显示,采用该算法流程的扫码终端能使解码精度从85%提升至近100%,并且可将平均解码时间由2.3 s缩减在500 ms以内,可满足实际解码需要。In order to separate the DataMatrix code image from complicated background, to improve the accuracyand speed of the decoding, we use the cross correlation matching algorithm to locate the code, then we use the＂pyramid-layered algorithm＂ to reduce the calculation cost. The improved Hough transform is used to carry outthe ＂L＂ boundary line of the image. The whole algorithm and the decoding process run on S3C2440 chipequipped with the Linux system. The result shows that with this algorithm, the decoding time of DataMatrix codecan be reduced from 2.3 s to 500 ms, and decoding accuracy can be improved from 85% to 100% , so it canmeet the practical demands.

关 键 词：互相关 HOUGH变换 DataMatrix码 嵌入系统 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]