可视密码 meaning in English
visual cryptography
Examples
- A cheater detectable visual cryptography scheme
可防止欺骗的可视密码分享方案 - Comparing with the image watermarking , the audio watermarking have a few characteristics : 1 . comparing with the visual media , audio frequency signal has less sampling points at every time interval . 2 . owing to human audition systems , it is more sensitive than human vision systems , therefore , it is more trouble to realize the imperceptibility of audition compared to the vision systems . 3 . to stick up to the cut attack , embedded watermark should keep synchronization . 4 . because of the bigger memory payload of audio frequency signal , the initial audio frequency signal must be removed during the extract in order to protect the maneuverability of project
数字水印技术是近几年来学术界兴起的一个前沿研究领域,提高算法的鲁棒性、安全性、实用性是数字水印的研究方向。本文提出的基于可视密码术的小波域下量化系数的鲁棒性音频数字水印方案,其优点在于利用小波变换的多分辨率特性在保证水印鲁棒性的同时使水印对原始音频信号的影响达到最小,采用量化系数的方法嵌入水印信息实现了盲水印,提高水印的工程应用价值。 - Audio frequency watermark can be classified three grades according to the different loading forms of watermark : time field watermark , transform field watermark and compressing field watermark . a mass of algorithm of time field watermark offers a simple and effective project , besides it has bigger information embedding payload . but it hasn ’ t a enough ability to process the sound signal
通过在水印序列中嵌入同步码提高水印的抗剪切性能;将可视密码术这一密码方案应用于数字水印,解密时无需任何密码学计算,通过人类的视觉系统,能直接完成解密工作,增加了水印的安全性和实用性。