A Digital Watermarking Algorithm for QR Code
A Digital Watermarking Algorithm for QR Code
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发表时间：
2011
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通讯作者：
Wang Rui-ling
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作者：
Wang Rui-ling
将二维条码与水印技术相结合是当前安全领域的研究热点，本文提出了一种新的二维条码数字水印方法，该方法利用水印技术将不可见水印嵌入到二维条码中，水印嵌入过程中比较二维条码的DCT中频系数，为了防止二维条码在图像的DCT域中溢出，对QR图像进行模糊化和加噪处理，为了抵抗打印和扫描后的图像失真，多次重复嵌入水印，水印的提取采用模糊模式识别中的两个最大隶属度，而不是原始图像，实验结果证明了算法的可行性。
The technology combined the 2D bar code with watermark is the hot topic of current research in security field.This paper presents a new digital watermark approach for the QR code.An invisible watermark is embedded in the QR code with the watermark technology,during the technology the DCT intermediate frequency coefficients is compared.In order to prevent QR code overflowing in the DCT domain of the image,to fuzzy and add noise in QR image.In order to resist image distortion after printing and scanning,the watermark is embedded repeatedly many times.The watermark is extracted using two maximum membership degree in fuzzy pattern recognition,not the original image.Experiment results have demonstrated the feasibility of the algorithm.