CAJ | 학술논문

计算机通信技术的迅速发展使数字多媒体信息的传播越来越方便快捷,但随之而来的信息的安全保护问题日益突出.数字水印技术是目前开放网络环境进行秘密信息传送和版权保护的有效方法.本文基于二维离散小波变换,选取视频帧中处于运动区域内的特征点,通过算法修改小波系数来实现水印信息的插入和提取.该方法充分利用了人眼对于运动区域的不敏感性和离散小波变换在图像压缩中的优点.经过仿真,该方法有很好的不可见性,并且可以经受住MPEG-2压缩,具有较强的鲁棒性.
계산궤통신기술적신속발전사수자다매체신식적전파월래월방편쾌첩,단수지이래적신식적안전보호문제일익돌출.수자수인기술시목전개방망락배경진행비밀신식전송화판권보호적유효방법.본문기우이유리산소파변환,선취시빈정중처우운동구역내적특정점,통과산법수개소파계수래실현수인신식적삽입화제취.해방법충분이용료인안대우운동구역적불민감성화리산소파변환재도상압축중적우점.경과방진,해방법유흔호적불가견성,병차가이경수주MPEG-2압축,구유교강적로봉성.
The rapid development of computer communication technology makes transmission of digital multimedia information more convenient, however, the subsequent protection of information security issues become increasingly prominent. Digital watermarking is an effective methods of secret information transmission and copyright protection in open network environment. In this paper, we select the feature points in moving region within the video frames based on two-dimensional discrete wavelet transform. Modify wavelet co- efficients by algorithm to achieve watermark insertion and extraction. The method uses the feature that the human eye is not sensitive to movement area and the advantages the discrete wavelet transform in image compression. After simulation, the method has good In- visibility, and can withstand the MPEG-2 compression ,so it has strong robustness.