中文摘要：

基于快速响应（QR）码的电子票业务是当前数字化时代的应用热点，为了提高其防伪性，首先分析了防伪电子票数字水印算法性能指标，指出了防伪电子票数字水印算法和通常的多媒体数字水印算法性能指标的差异．对经典的二值图像数字水印算法在防伪电子票中的应用进行了试验和分析，进而提出了一种新的基于QR码的防伪电子票数字水印算法．该算法充分利用混沌序列的良好性能，应用混沌密钥控制空间域水印嵌入位置，提高了水印的容量和鲁棒性．为进一步提高防伪水印的性能，提出了混沌密钥自适应调整策略，在确保条码信息可识别的条件下，最大限度地提高了水印嵌入的容量和鲁棒性．

英文摘要：

E ticketing business based on QR 2D barcode becomes one hotspot in the current digital era, but its anti-counterfeiting problem is still left to be resolved. This paper firstly analyses and discusses such primary performance parameters as imperceptibility, capacity,and robustness for anti-counterfeiting E-ticketing digital watermarking algorithm,and then the differences of the parameters between anti-counterfeiting E-ticketing digital watermarking algorithm and general multimedia digital watermarking algorithm are pointed out. Since QR barcode is actually a binary image, this paper secondly tests and illustrates some classic binary image water- marking algorithms for anti-counterfeiting E-ticketing digital watermarking algorithm based on QR 2D barcode. According to the Ex- perimental results and analysis, a novel anti-counterfeiting E-ticketing digital watermarking algorithm based on QR 2D barcode is then proposed. The proposed algorithm embeds watermarks in spatial domain,and the watermarked positions are decided by a chaos key. To improve the anti-counterfeiting performance,adaptive adiustment strategy for chaos key is finally proposed,which greatly increa- ses watermarking capacity and improve its robustness.