将改 进DTCWT算法和奇异值分解(SingularValueDecomposition,SVD)引入到万向轴动不平衡检测中,该方法的核心是:对万 向节安装机座的振动信号进行改进DTCWT变换得到不同尺度的分解信号,对低频近似信号进行奇异值分解,以奇异值 关键叠层作为奇异值的选择准则对信号进行重构,应用重构信号的傅里叶谱来检测高速列车万向轴的...
万向轴动不平衡检测的改进 DTCWT-SVD 方法 作者:何刘; 林建辉; 刘新厂; 黄衍万向传动轴奇异值分解动不平衡检测 摘要:针对经典小波和双树复小波(Dual-Tree Complex Wavelet Transform,DTCWT)频率泄露和混叠的根本缺陷,提出改进 DTCWT 算法,该算法解决了经典小波存在负频率以及经典小波和 DTCWT 滤波器频率不完全截止...
Firstly, the method constructed a Hankel matrix to decompose the branch current signal through a dual-tree complex wavelet transform(DT-CWT). Secondly, the Hankel matrix was decomposed by the singular value decomposition(SVD)method with the aim of obtaining a series of singula...
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...
In this paper, a blind video watermarking technique based on Dual-Tree Complex Wavelet Transform (DTCWT), Singular Value Decomposition (SVD), and chrominance channel, is presented, which uses a signature-based approach for authentication.Ram Mohan Mishra...
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. ...
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...
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...