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An object detection method which can be used in indoor and outdoor monitoring was proposed in this paper. Improving shortcomings and disadvantages of moving object extraction in traditional inter-frame difference method, it puts forward a moving object recognition algorithm based on redundant wavelet transform, namely, extraction of feature points in redundant wavelet domain to generate a delaunay...
It is a challenging work to design a robust audio watermarking scheme against various attacks. Based on wavelet moment and synchronization code, we propose a new digital audio watermarking algorithm with good auditory quality and reasonable resistance toward desynchronization attacks in this paper. Firstly, the origin digital audio is segmented and then each segment is cut into two parts. Secondly,...
Wavelet energy entropy has a small calculation amount, and it has a unique sensibility to slightly change of the dynamic system parameters. This paper presents a novel transient-based protection for power system EHV transmission line, which employ the value of wavelet energy entropy to reflect the different energy distribution between internal and external fault. The basic principle of the protection...
Strain mode is sensitivity to structure local characteristics and wavelet transform has high local property in time and frequency domain. By combining the character of strain mode and wavelet transform, strain mode is adopted as response signal to continuous wavelet analysis for damage identification. Damage location is detected by modulus maximum and damage extent is detected by Lipschitz exponent...
Video surveillance images are always contaminated by noise. In order to improve the quality of the images for further processing, it is necessary to denoise. The paper takes advantages of the characteristics of wavelet and Wiener filtering, proposes a kind of image de-noising algorithm. Compared with wavelet threshold de-noising algorithm and spatial Wiener filtering, it can improve PSNR efficiently...
The conventional image coding metrics based wavelet focus on separable wavelet decomposition, which are not fit for human visual system to extract natural images features, while true dimensional wavelet decomposition can deal with them. This paper studied construction of true bidimensional wavelet filter banks and analyzed similarity of decomposed subbands, furthermore, presented a kind of binary-tree...
In this paper, we use one channel to collect the surface EMG signals of these actions separately such as elbow flexion, elbow extension, forearm supination and forearm pronation. Whereas the advantage of wavelet transform that it has fine frequency resolution at low frequencies, we can get a 4-dimension characteristic vector which is made up of 3 maximum values of detail coefficients (coefficients...
Because the redundant discrete wavelet transform (RDWT) is shift invariant, the motion estimation algorithms in the redundant wavelet domain have good performance. And, deformable block matching algorithm (DBMA) not only can reduce 'block effect' which is brought by traditional block matching algorithm but also can have an effective prediction for the non-translational motion. So, this paper mainly...
This paper presents a new non-unit voltage protection algorithm for extra high voltage (EHV) transmission lines. This scheme is developed using wavelet analysis, in which the singularity of fault transient voltage signals in one terminal is utilized to discriminate clearly between internal and external faults. Lipschitz exponent (LE) is obtained from wavelet modulus maximum to detect singularity of...
A new non-unit voltage protection algorithm for extra high voltage (EHV) transmission lines is presented in this paper. The singularity of fault transient voltage signals in one terminal is utilized to discriminate clearly between internal and external faults. Lipschitz exponent (LE) is obtained from wavelet modulus maximum to detect singularity of signals. A typical 500 kV EHV transmission system...
A new ultra high-speed protection scheme is proposed in this paper. Using wavelet transform with multiresolution analysis, the current signals is decomposed into a series of detailed wavelet components. The spectral energies of the wavelet components are calculated and then employed to detect the faults. Characteristics of the proposed ultra high-speed protection algorithm are analyzed and results...
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