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It has been found that stochastic resonance can filter out the image noise and enhance the image. However, since the stochastic resonance has a characteristic that the high frequency energy is shifted to the low frequency, the denoised image will lose detail and become blurred. Because the noise and detail of the image are mainly distributed in the high frequency band, image denoising and detail retention...
A frequency-domain pulse design method for ultra wideband (UWB) vehicular radar system is proposed. Morlet wavelet pulses with the diverse dilatation factors are randomly selected as basis ones. By adjusting these parameters such as the dilation and the value of the amplitude spectral, the corresponding power spectral density (PSD) of linear combination pulse is obtained which must match the FCC's...
In this paper, a novel discriminant analysis approach using Angular Fourier transform is proposed for face recognition. As a generalization of Fourier transform, the Angular Fourier transform is an important frequency-domain analysis technique. The proposed approach combines it with discriminant analysis method. First, this approach selects appropriate value of angle parameter for discrete Angular...
In this paper, a novel Gabor-2DFisherface approach with selecting 2D Gabor principal components and discriminant vectors is proposed for face recognition. Gabor transform is an important frequency-domain analysis tool. The proposed approach combines it with discriminant analysis technique. This approach first preprocesses all image samples by using Gabor transform, and then calculates 2D Gabor principal...
This paper presents a new frequency-domain method for predicting conducted electromagnetic-interference (EMI) noise in AC switching power converters whose switching conditions vary during an operating period. Based on an equivalent modular-terminal-behavioral (MTB) frequency-domain EMI source model developed for one switching period at a given operating point, the proposed approach superposes MTB...
This paper presents a new frequency-domain method for predicting conducted electromagnetic interference (EMI) noise in phase-leg-based power converters. Based on modular-terminal-behavioral (MTB) equivalent EMI source model for a switch module (half of a phase-leg) developed at a given operating condition, the proposed approach applies the MTB model to predict EMI noise for the converter consisting...
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