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Wavelet modulation is a new type of multi-carrier modulation, this paper based on the asymptotically Gaussian distribution and frequency spectrum's feature of OFDM and wavelet modulated (WM) signal, studies the recognition of wavelet modulated signal in the additive white Gaussian noise channel. Using the joint estimation of the signal to noise ratio (SNR) and features value based on higher order...
Most of attacks in video digital watermarking are synchronization attacks. They can be classified as temporal and spacial synchronization attacks after characteristics of video digital watermarking are analyzed. Then synchronization robustness can be divided into inter-frame robustness and intra-frame robustness according to classifications of synchronization attacks in video digital watermarking,...
This paper adopts unsupervised on-line shape learning for image analysis tasks, removing the requirement for a pre-defined set of templates and allowing the system to handle novel objects. This learning approach was chosen for its simplicity and extensibility. The results show that the size and shape features are sufficient for accurate object classification. We briefly focused on how to use and work...
Due to factors of affecting vehicle recognition is many and complex, the affecting degree of every factor is different, and the borderline is fuzzy, so it is difficult to estimate together using traditional mathematics model. The support vector machine (SVM) is a new machine study method. In this paper, a vehicle recognition model based on Least Squares Support Vector Machine is presented. In the...
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