基于小规模量子线路和格雷码置乱的量子水印方案-计算机辅助设计与.PDFVIP

29 9 Vol.29 No.9 2017 9 Journal of Computer-Aided Design Computer Graphics Sep. 2017 基于小规模量子线路和格雷码置乱的量子水印方案 李盼池, 赵 娅 (东北石油大学计算机与信息技术学院 大庆 163318) (lipanchi@) : 为解决量子彩色图像的水印嵌入和抽取问题, 提出一种采用新颖的增强量子图像描述和格雷码置乱的实现 方案. 对于嵌入过程, 首先采用受控非门对于水印图像像素的位置和颜色同时置乱; 然后将置乱后水印图像的幅度 从 2n 2n 扩展到2n+1 2n+2 , 将像素颜色值由 24 比特(每通道 8 比特)改为 3 比特(每通道 1 比特); 最后将扩展后水印图 像的颜色值, 通过模2 加运算嵌入到幅度为2n+1 2n+2 载体图像颜色值的最低位中. 抽取过程为嵌入的逆过程. 仿真结 果表明, 该方案在可视化质量、噪声下的鲁棒性能、水印图像置乱效果和计算复杂度4 个方面优于对比方案. : 量子图像描述; 量子图像置乱; 量子图像水印; 量子图像处理 : TP391.41 Quantum Watermarking Scheme Using Small-scale Quantum Circuits and Gray-code Scrambling Li Panchi and Zhao Ya (School of Computer Information Technology, Northeast Petroleum University, Daqing 163318) Abstract: To solve the problem of watermark embedding and extracting of quantum color images, a method of using novel enhanced quantum representation and Gray-code scrambling was proposed. For the embedding proc- ess of quantum watermarking, at first, the position and color of pixels in watermark image were scrambled by the controlled-not gates, and then, the scrambled watermark with 2n n 2 image size and 24 color qubits (8 qubits per channel) was expanded to an image with 2n+1 2n+2 image size and 3 color qubits (1 qubit per channel). Finally, the color value of the expanded watermark image was added to the lowest qubit of color value of the carrier im- age sized 2n+1 2n+2 by modulo 2 additions. The watermark was extracted from the watermarked image by apply- ing operations in the reverse order. The experimental results show that the proposed method is superior to the contrast method in terms of four items: visual quality, robustness performance under noises, scrambling effe