3.本发明的目的在于提供一种基于dt cwt-svd以及三维子带侧视图的盲鲁棒视频水印方法,以实现对帧率变化、帧增加、帧删除、帧交换等时间去同步攻击鲁棒,同时对压缩、高斯噪声等信号处理攻击鲁棒。 4.本发明利用视频侧视图能反映视频的时序信息以及dt-cwt变换具有良好的方向选择性和近似唯一不变性等特点,提供一种通过调...
应用重构信号的傅里叶谱来检测高速列车万向轴的动不平衡.该方法在消除经典小波变换和 DTCWT 频率混叠的同时提高谱线清晰度,凸显故障特征.应用万向轴动不平衡试验数据对该方法进行试验验证,结果表明:改进 DTCWT-SVD 能够很好提取出万向轴动不平衡故障特征频率的基频,倍频,与经典小波,DTCWT,纯改进 DTCWT 相比,该方法...
DTCWT、K-SVD、Canny算子、区域能量为了快速有效的获取高质量的融合图像,利用具有线性以及多方向选择性的双树复小波(DTCWT)对源图像进行分解,结合K-SVD(K奇异值分解)算法获取训练字典进行低频信号的稀疏融合,同时将Canny算子与区域能量法结合进行高频信号的融合.选用两组红外与可见光图像进行融合实验,对比传统的小波与...
DTCWT is widely used in all image processing applications over a decade. A novel imperceptible video watermarking scheme is proposed. This method is implemented with the use of Dual Tree Complex Wavelet Transform (DTCWT) and Singular value decomposition (SVD) which helps in proof of ownership. ...
DTCWT is widely used in all image processing applications over a decade. A novel imperceptible video watermarking scheme is proposed. This method is implemented with the use of Dual Tree Complex Wavelet Transform (DTCWT) and Singular value decomposition (SVD) which helps in proof of ownership. ...
The performance metrics such as PSNR, NCC and SSIM is simulated using MATLAB for the Dual Tree Complex Wavelet Transform (DTCWT) and the security measures parameters like FAR, FRR, System Accuracy and the ROC comparison curve of the DWT and DTCWT are obtained.Manonmani PanneerselvamR. Divy...