中文摘要：

利用PDF417二维条码其条块边角的特点，提出了一种基于条块边角的PDF417条码水印方法。首先对水印信息整体进行预判，以选择合适的黑白交界区域作为水印嵌入位置，根据水印内容对二维码图像的相关信息进行修改，以实现水印的嵌入和提取。实验结果表明，此算法相比同类空间域水印算法，具有更大的水印嵌入容量和更高的图像品质。同时，具有较好的抗JPEG压缩、高斯噪声和打印扫描功能，具有较强的顽健性。

英文摘要：

A digital watermark method based on the bar-block-margin characteristics of PDF417 two-dimension code was presented. The proposed method prejudges the watermark information to choose the suitable embedding positions. According to the watermark, the information of the original PDF417 image was modified for embedding and extracting. The experimental results showed that, in comparison with the other methods in the spatial domain, the proposed method has a higher capacity and better watermarked image quality, as well as better robustness against JPEG compression, Gaussian noise and printing and scanning.