颜色失真二维彩色条形码的自适应阈值机读法

郭宏瑞;谭吉春;王晓锋

应用光学 ›› 2007, Vol. 28 ›› Issue (3) : 257-261.

应用光学 ›› 2007, Vol. 28 ›› Issue (3) : 257-261.

颜色失真二维彩色条形码的自适应阈值机读法

  • 郭宏瑞,谭吉春,王晓锋
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Machine-read method for faded 2-D color barcodes using self-adaptive threshold

  • GUO Hong-rui,TAN Ji-chun,WANG Xiao-feng
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摘要

采用紫外辐照加速老化方法研究纸基彩色条形码的褪色规律。基于CIELAB模型分析紫外辐照累计时间与二维条形码色差的关系,对4色打印标签的检测结果表明:品红色褪变速率较大,青色、黄色和黑色的褪变速率逐次减小。基于RGB三基色直方图和概率统计原理,提出能有效校正颜色失真、正确机读二维条形码的“自适应阈值法”。实验表明:对于紫外25h加速老化后的褪色条形码,“自适应阈值法”的机读误码率≤0.05%。该研究结果为褪色彩色条形码标签进入实用阶段提供了实验依据。

Abstract

The fading law of 2-D paper-based color barcodes is analyzed with the ultraviolet aging test. The relation between the accumulative ultraviolet irradiation time and the chromatic aberration of 2-D color barcodes is analyzed based on the CIELAB model. The detection results of four-color printed label show that the fading velocity of fuchsine is faster than cyan, yellow and black. A self-adaptive threshold method, which can correct color aberration effectively and can machine-read the 2-D barcodes correctly, is put forward based on RGB trichromatic histogram and the principle of probability statistics. The experiment indicates that the machineread bit error rate of the self-adaptive threshold method is less then 0.05%, which was acquired from 25h ultraviolet aging test of barcodes. The result provides a criterion for the service period of the color barcodes.

关键词

误码率 / 褪色 / 紫外辐射老化试验 / 二维条形码 / 彩色印刷

Key words

ultraviolet ageing test / 2-D barcode / fading / bit error rate / color printing

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郭宏瑞, 谭吉春, 王晓锋. 颜色失真二维彩色条形码的自适应阈值机读法. 应用光学. 2007, 28(3): 257-261
GUO Hong-rui, TAN Ji-chun, WANG Xiao-feng. Machine-read method for faded 2-D color barcodes using self-adaptive threshold. Journal of Applied Optics. 2007, 28(3): 257-261

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