二维条码空间域数字水印嵌入方法研究

Research of Method of Digital Watermarking in 2-D Barcode Based on Space Structure

在分析基于二维条码图像图形空间结构的水印嵌入方法基础上,阐述了该方法存在"算法略显繁冗"和"算法结束条件的判断不够清晰"等问题.根据工程实现的具体要求,提出了对该算法的改进方法,并加以具体实现.此方法在二维条码中嵌入水印信息,并引入加密方法,进一步提高了水印嵌入的安全性.结果表明,该方法可以在不影响识读条件下,有效地嵌入较多水印信息.

By analyzing the embedded watermark based on 2-D barcode image space structure,the paper reveals the drawbacks of the method as ＂cumbersome algorithm＂,＂indecisive judgment for terminating conditions of algorithm＂ and others.To meet the need of engineering,the paper puts forth an improved algorithm by embedding watermark in 2-D barcode and encrypting the information to ensure security.Results show that more watermark information can be effectively embedded without interfering with the original reading.