The depth information of the scene indicates the distance between the object and the camera,and depth extraction is a keytechnology in 3D video *** emergence of Kinect makes the high resolution depth map capturing **...
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The depth information of the scene indicates the distance between the object and the camera,and depth extraction is a keytechnology in 3D video *** emergence of Kinect makes the high resolution depth map capturing ***,the depth map captured by Kinect can not be directly used due to the existing holes and noises,which needs to be *** propose a texture combined inpainting algorithm in this ***,the foreground is segmented combined with the color characteristics of the texture image to repair the foreground of the depth ***,region growing is used to determine the match region of the hole in the depth map,and to accurately position the match region according to the texture *** the match region is weighted to fill the ***,a Gaussian filter is used to remove the noise in the depth *** results show that the proposed method can effectively repair the holes existing in the original depth map and get an accurate and smooth depth map,which can be used to render a virtual image with good quality.
geospatial objects detection within complex environment is a challenging problem in remote sensing area. In this paper, we derive an extension of the Relevance Vector Machine (RVM) technique to multiple kernel version...
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geospatial objects detection within complex environment is a challenging problem in remote sensing area. In this paper, we derive an extension of the Relevance Vector Machine (RVM) technique to multiple kernel version. The proposed method learns an optimal kernel combination and the associated classifier simultaneously. Two feature types are extracted from images, forming basis kernels. Then these basis kernels are weighted combined and resulted the composite kernel exploits interesting points and appearance information of objects simultaneously. Weights and the detection model are finally learnt by a new algorithm. Experimental results show that the proposed method improve detection accuracy to above 88%, yields good interpretation for the selected subset of features and appears sparser than traditional single-kernel RVMs.
A dual-pump dark pulse generation mechanism based on normal-dispersion Si microresonators compatible with commercial quantum cascade lasers (QCLs) is numerically investigated. It is found that there exists a constant ...
A dual-pump dark pulse generation mechanism based on normal-dispersion Si microresonators compatible with commercial quantum cascade lasers (QCLs) is numerically investigated. It is found that there exists a constant threshold of ∼75 mW for the total power, together with a same minimum power of ∼12 mW each for the primary and auxiliary laser to support the dark pulse microcomb. Further investigation reveals that the strong thermo-optic effect of Si can contribute to the mode-locking region expanding by 1.5 times along with the increase of pump power. Therefore, such dual-pump approach in the normal-dispersion microresonators, which allows flexible configuration of pump lasers and reduces the requirement for high power and frequency tuning, can provide a solution towards compact MIR microcombs.
Image-based synthetic aperture radar (SAR) target three-dimensional (3D) reconstruction is an important application for extracting target information from high-resolution two-dimensional (2D) SAR images. However, due ...
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Typhoon Siamba made landfall in Western Guangdong on July 2, 2022, causing great losses to crops in western Guangdong. Radar remote sensing can penetrate through clouds and fog, is suitable for identifying flooded are...
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Non-orthogonal multiple access(NOMA)technique is an expert on channel differences *** this paper,a dual-hop NOMA-based cooperative relaying network where a best relay is selected as an active node to accomplish the co...
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Non-orthogonal multiple access(NOMA)technique is an expert on channel differences *** this paper,a dual-hop NOMA-based cooperative relaying network where a best relay is selected as an active node to accomplish the communication between a source and a destination is *** assume that both decode-and-forward(DF)and amplify-and-forward(AF)protocols are applied to the selected *** metrics that ergodic sum-rate and outage probability are investigated,and the closed-form expressions of the latter for DF and AF protocols are *** and simulation results are conducted to verify the validity of the theoretical analysis,in which we can see that the NOMA based DF relaying is better than the NOMA based AF relaying and other existing NOMA-based cooperative communication schemes.
The accumulation of thermal time usually represents the local heat resources to drive crop *** of temperature-based agro-meteorological indices are commonly generated by the spatial interpolation of data collected fro...
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The accumulation of thermal time usually represents the local heat resources to drive crop *** of temperature-based agro-meteorological indices are commonly generated by the spatial interpolation of data collected from meteorological stations with coarse geographic *** solve the critical problems of estimating air temperature(T a) and filling in missing pixels due to cloudy and low-quality images in growing degree days(GDDs) calculation from remotely sensed data,a novel spatio-temporal algorithm for T a estimation from Terra and Aqua moderate resolution imaging spectroradiometer(MODIS) data was *** is a preliminary study to calculate heat accumulation,expressed in accumulative growing degree days(AGDDs) above 10 ℃,from reconstructed T a based on MODIS land surface temperature(LST) *** verification results of maximum T a,minimum T a,GDD,and AGDD from MODIS-derived data to meteorological calculation were all satisfied with high correlations over 0.01 significant ***,MODIS-derived AGDD was slightly underestimated with almost 10% relative ***,the feasibility of employing AGDD anomaly maps to characterize the 2001-2010 spatio-temporal variability of heat accumulation and estimating the 2011 heat accumulation distribution using only MODIS data was finally demonstrated in the current *** study may supply a novel way to calculate AGDD in heat-related study concerning crop growth monitoring,agricultural climatic regionalization,and agro-meteorological disaster detection at the regional scale.
Increasing greening of planet Earth to slow down the rise of atmospheric CO_(2) concentrations is certainly desirable;however,its consequences on water resources are less affirmative and thus are a matter of wide ***,...
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Increasing greening of planet Earth to slow down the rise of atmospheric CO_(2) concentrations is certainly desirable;however,its consequences on water resources are less affirmative and thus are a matter of wide ***,as the largest and most successful country of the world in terms of artificial revegetation,is naturally the focus of the concerns and *** on previous studies,we analyzed the mechanism for the effects of climate and watershed characteristics on water resources,explained various hydrological results and phenomena,and considered the ways in which water consumption by artificial revegetation projects can be ***,some guidelines are suggested for artificial revegetation at watershed scale with consideration of water resource *** findings of this study highlight the need for more top-down approaches when studying the mechanism of"forest and water".
A novel single channel SAR-GMTI method is proposed in this paper. When the azimuth mismatch filter performs compression, it induces shifted difference between the stationary and moving targets because of having differ...
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We study the problem of recognizing sign language automatically using the RGB videos and skeleton coordinates captured by Kinect, which is of great significance in communication between the deaf and the hearing societ...
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