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A united optimum images fusion based on analysis of color distortion 被引量:2
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作者 肖刚 敬忠良 +1 位作者 李建勋 Henry Leung 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第3期144-147,共4页
In remote sensing community, IHS (intensity, hue, and saturation) transform is one of the most commonly used fusion algorithm. A study on IHS fusion indicates that the color distortion cannot be avoided. Meanwhile, wa... In remote sensing community, IHS (intensity, hue, and saturation) transform is one of the most commonly used fusion algorithm. A study on IHS fusion indicates that the color distortion cannot be avoided. Meanwhile, wavelet decomposition has a property of frequency division in transform domain. And the statistical property of wavelet coefficient reflects those significant features. So, a united optimal fusion method, which using the statistical property of wavelet decomposition and IHS transform on pixel and 展开更多
关键词 high A united optimum images fusion based on analysis of color distortion IHS RGB
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RATE-CONSISTENT DIRECTIONLET CODESTREAM CREATED BY MODIFIED BFOS ALGORITHM 被引量:1
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作者 Ma Lihong Mai Dike +1 位作者 Ren Miao Lin Chunyi 《Journal of Electronics(China)》 2010年第1期118-126,共9页
In order to improve the bit allocation efficiency of Directionlet coding,a modified Breiman,Friedman,Olshen and Stone(BFOS) algorithm is suggested for rate consistent truncation.Two modifications are:(1) Dominant dire... In order to improve the bit allocation efficiency of Directionlet coding,a modified Breiman,Friedman,Olshen and Stone(BFOS) algorithm is suggested for rate consistent truncation.Two modifications are:(1) Dominant direction adjustment is proposed to balance the cost of sparse description and segment artifacts caused by discontinuous adjacent direction pairs.(2) Priority related merging is also proposed in the BFOS distortion list to find an optimal trimming element for unequal-importance bit allocation.Experimental results show that block effects could be removed without obvious bpp increment by selecting the dominant direction and its adjustment according to neighborhood homogeneity,and combined multi-PRIority(PRI) based merging of the M-ordered list offers unequal importance allocation and leads to a Peak Signal-to-Noise Ratio(PSNR) gain of 0.4 dB~1.3 dB. 展开更多
关键词 Directionlet Dominant direction map Multi-PRIority(PRI) merging Bit distortion based truncation
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Speech distortion measure based on auditory properties
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作者 CHEN Guo HU Xiulin +1 位作者 ZHANG Yunyu ZHU Yaoting (Department of Electronics and Information Engineering, Huazhong University of Science and Technology Wuhan 430074) 《Chinese Journal of Acoustics》 2000年第4期339-345,共7页
The Perceptual Spectrum Distortion (PSD), based on auditory properties of human being, is presented to measure speech distortion. The PSD measure calculates the speech distortion distance by simulating the auditory p... The Perceptual Spectrum Distortion (PSD), based on auditory properties of human being, is presented to measure speech distortion. The PSD measure calculates the speech distortion distance by simulating the auditory properties of human being and converting short-time speech power spectrum to auditory perceptual spectrum. Preliminary simulative experiments in comparison with the Itakura measure have been done. The results show that the PSD measure is a perferable speech distortion measure and more consistent with subjective assessment of speech quality. 展开更多
关键词 Speech distortion measure based on auditory properties PLP DPSD DIS
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Control of Water Supply in Pipe Networks Nonlinear Case
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作者 Nagib G. Nasher Mohammed 《Journal of Mechanics Engineering and Automation》 2011年第4期320-324,共5页
The paper deals with control of supply in pipe networks based on so-called Dynamic Virtual Distortion Method. Making use of the analytical network model of this installation and using presented below, the so-called Vi... The paper deals with control of supply in pipe networks based on so-called Dynamic Virtual Distortion Method. Making use of the analytical network model of this installation and using presented below, the so-called Virtual Distortion Method (VDM), the control of water supply can be performed. Minimization of supply pressure in inlets to the network, subject to inequality constraints imposed on outlet pressure (in chosen nodes) is discussed. Taking advantage of pre-computed influence vectors, the real-time control strategy can be realised with small computational effort and therefore, can be managed with use of hardware-based controllers. Non-linear constitutive relation (water flow vs. pressure head) has been assumed. 展开更多
关键词 Water supply optimal supply control VDM (virtual distortion method) based design.
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