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| 1 | Filtering of Airborne Lidar Point Clouds for Complex Cityscapes显示文摘为激光雷达点云的一个新奇过滤算法被介绍,它能为复杂都市风景工作很好。没有以前的三角测量或 rasterization,它的主要特征基于未加工的激光雷达点云正在过滤。3D 在点之中的拓扑的关系被用来在断绝的顶寻找边点,它是关键信息认出赤裸的地球点和大楼点。实验结果证明建议算法能在赤裸的地球中保存不连续的特征并且没有尺寸的影响和大楼的形状。 | JIANG Jingjue ZHANG Zuxun MING Ying | 2008 | Geo-Spatial Information Science2008，11，1： | 6 |
| 2 | CHANGE DETECTION FROM AERIAL IMAGES ACQUIRED IN DIFFERENT DURATIONS显示文摘Because of quick development of cities, the update of urban GIS data is very important. Change detection is the base of automatic or semi-automatic data update. One way of change detections in urban area is based on old and new aerial images acquired in different durations. The corresponding theory and experiments are introduced and analyzed in this paper. The main procedure includes four stages. The new and old images have to be registered firstly. Then image matching, based on the maximum correlation coefficient, is performed between registered images after the low contrast areas have been removed. The regions with low matching quality are extracted as candidate changed areas. Thirdly, the Gaussian-Laplacian operator is used to detect edges in candidate changed areas on both the registered images, and the straight lines are detected by Hough transformation. Finally, the changed houses and roads can be detected on the basis of straight line matching in candidate changed areas between registered images. | Zhang Jianqing Zhang Zuxun Fang Zhen Fan Hong | 1999 | Geo-Spatial Information Science1999，2，1： | 2 |
| 3 | Sparse channel recovery with inter-carrier interference self-cancellation in OFDM显示文摘A new sparse channel estimation method of orthogonal frequency division multiplexing(OFDM) system based on intercarrier interference(ICI) self-cancellation is investigated. Firstly,based on the characteristic that the ICI generated by a subcarrier to the two adjacent subcarriers is approximately equal, a data pair with opposite sign and equal magnitude is modulated onto two adjacent subcarriers as pilot pair to eliminate the effect of ICI on pilots. Secondly, a new OFDM channel estimation model based on linear time-varying(LTV) model and compressed sensing(CS) is constructed, which obtains the mean of the gains of the multipath.Finally, a pilot pair optimization algorithm based on two layers loop is used to realize the minimization of the mutual coherence of the measurement matrix. For time-varying channel scenes with different numbers or delay of multipath and maximum Doppler frequency shift, the performances of several channel estimation methods are verified by simulation. The result shows that the new method has obvious advantage in both the performance of the channel estimation and the spectral efficiency. | HU Jiansheng SONG Zuxun GUO Shuxia ZHANG Qian SHUI Dongdong | 2018 | Journal of Systems Engineering and Electronics2018，29，4： | 2 |
| 4 | Photogrammetric Modeling of Linear Features with Generalized Point Photogrammetry 显示文摘 | ZHANG Zuxun ZHANG Yongjun ZHANG Jianqing | 2008 | Photogrammetric Engineering & Remote Sensing2008，74，9： | 1 |
| 5 | Change Detection Based on DSM and Image Features in Urban Areas显示文摘On the basis of stereo image analysis, the change detection of man-made objects in urban areas is introduced. Information of the height of man-made objects can be applied to reinforce their change detection. By comparison between the new and old DSMs, the changed regions are extracted. However, our aim is to detect changes of man-made objects in urban area and further in the potential areas by the means of line-feature matching and gradient direction histogram. The experiments based on the aerial images from Japan have proven that the algorithm is correct and efficient. | LIU Zhifang ZHANG Jianqing ZHANG Zuxun FAN Hong LIU Zhifang, Ph.D candidate, Institute of Image & Graphic, Sichuan University, Chengdu 610064, China. | 2003 | Geo-Spatial Information Science2003，6，2： | 1 |
| 6 | Parametric Narrow-Band InISAR 3D Imaging Based on Compressed Sensing显示文摘For muti-scatter point target and undersampled data,tradintional imaging method has a poor precision for imaging result and spin angular velocity.In view of the above problems,this paper proposes a narrow-band Interferometric inverse synthetic aperture radar(InISAR)3-dimensional(3D)Compressed sensing imaging method based on the joint spin angle velocity error parameter estimation.First,a sparse model of narrow-band spin target is constructed.Then,the image entropy is used as the criterion function to search the optimal angle velocity by the joint reconstruction iteration.Finally,the image of the target is obtained by interference processing.The simulation results show that compared with the traditional method,the estimation of spin angular velocity and the imaging result are more accurate in proposed method. | WANG Baoping ZHANG Yan FANG Yang SONG Zuxun | 2020 | Chinese Journal of Electronics2020，29，3： | 1 |
| 7 | Photogrammetric Modeling of Linear Features with Generalized Point Photogrammetry显示文摘 | Zhang Zuxun Zhang Yongjun Zhang Jianqing | | 0，，09： | 1 |
| 8 | Photogrammetric Modeling of Linear Features with Generalized Point Photogrammetry显示文摘 | Zhang Zuxun Zhang Yongjun Zhang Jianqing | 2008 | Photo- grammetric Engineering Remote Sensing2008，74，11： | 1 |
| 9 | Enhanced levels of soluble and membrane-bound CD137 levels in patients with acute coronary syndromes显示文摘 | Dongming L Zuxun L Liangjie X | 2010 | Clinica Chimica Acta2010，411，56： | 1 |
| 10 | Factors influencing pre-hospital delay among acute ischemic stroke patients in the midlands of China显示文摘 | Huajie Yang Juan Zhang Jun Xie Chen Yang Xiaoxin Dong Yanhong Gong Shiyi Cao Xiaoxv Yin Zhihong Wang Zuxun Lu | 2014 | International Journal of Cardiology2014，，： | 1 |
| 11 | Near field 3-D imaging approach for joint high-resolution imaging and phase error correction显示文摘This paper combines compressed sensing(CS) imaging theory and range migration algorithm(RMA), and then proposes a near-field three-dimensional(3-D) imaging approach for joint high-resolution imaging and phase error correction. Firstly, a sparse measurement matrix construction method based on a logistic sequence is proposed, which conducts nonlinear transformation for the determined logistic sequence, making it obey uniform distribution, then conducts sign function mapping, and generates the pseudorandom sequence with Bernoulli distribution, thus leading to good signal recovery under down-sampling and easy availability for engineering realization. Secondly, in combination with the RMA imaging approach, the dictionary with all scene information and phase error correction is constructed for CS signal recovery and error correction. Finally, the non-quadratic solution model jointing imaging and phase error correction based on regularization is built, and it is solved by two steps — the separable surrogate functionals(SSF) iterative shrinkage algorithm is adopted to realize target scattering estimate; the iteration mode is adopted for the correction of the dictionary model, so as to achieve the goal of error correction and highly-focused imaging. The proposed approach proves to be effective through numerical simulation and real measurement in anechoic chamber. The results show that,the proposed approach can realize high-resolution imaging in the case of less data; the designed measurement matrix has better non-coherence and easy availability for engineering realization.The proposed approach can effectively correct the phase error,and achieve highly-focused target image. | Yang Fang Baoping Wang Chao Sun Zuxun Song Shuzhen Wang | 2017 | Journal of Systems Engineering and Electronics2017，28，2： | 1 |
| 12 | Photogrammetric Modeling of Linear Features with Generalized Point Photogrammetry显示文摘 | Zhang Zuxun Zhang Yongjun Zhang Jianqing | 2008 | Photogrammetric Engineering & Remote Sensing2008，74，9： | 1 |
| 13 | THE STUDY ON AUTOMATIC REGISTRATION OF INSAR IMAGES显示文摘Interferometric Synthetic Aperture Radar (InSAR) allows production of high resolution DEM and detection of small earth motions using multiple pass SAR data sets obtained by remote sensing satellite. But the whole process has not yet reached sufficient robustness to warrant automated DEM production as commonly produced by stereovision with optical images. The automatic algorithm for precision registration is one of the bottlenecks in InSAR data processing. In this paper, an automatic approach with multi-step image matching algorithm is presented. All procedures are automatically implemented. The experiment is carried out successfully with SIR-C/L-band InSAR data. The triangular piecewise rectification is also advanced in reducing local distortion between the images and processing the large scene image. The primary result has prospect in the precision registration for the repeat-track InSAR data and reveals the potential of the presented automatic strategy. | Liao Mingsheng Zhang Zuxun Zhang Li Zhang Jianqing | 1999 | Geo-Spatial Information Science1999，2，1： | 1 |
| 14 | THE COHERENCE COEFFICIENT MAP AND RESIDUE GUIDED LEAST SQUARE PHASE UNWRAPPING ALGORITHM显示文摘The generation of high-resolution DEM from interferometric SAR has resulted in the need for accurate and efficient methods of 2-dimensional phase unwrapping. In this paper, we give a brief description of the mathematical base of phase unwrapping, and a detailed description of the unweighted and weighted least square phase unwrapping algorithm.Then our algorithm combining with the weighted least square phase unwrapping guided by the branch-cuts derived from Goldstein’ s algorithm and coherence coefficient map derived from the INSAR data is provided. In our experiment we write subroutines of the Goldstein’s branch-cut algorithm,unweighted and weighted least square phase unwrapping algorithm as well as our algorithm,and construct a small experiment system to resolve the phase unwrapping problem. Finally we test our algorithm on some INSAR data. The result shows that our approach can obtain unwrapped phase correctly and efficiently. | Zhang Li Liao Mingsheng Zhang Zuxun Zhang Yong | 1999 | Geo-Spatial Information Science1999，2，1： | 1 |
| 15 | An approach of semiautomated road extraction from aerial images based on template matching and neural network显示文摘 | Hu Xiangyun Zhang Zuxun Zhang Jianqing | 2000 | International Achives of Photogrammetry and Remote Sensing2000，33，33： | 1 |
| 16 | HOUSE CHANGE DETECTION BASED ON DSM OF AERIAL IMAGE IN URBAN AREA显示文摘The change of house often brings on the change of DSM in an area over different periods. If we can apply information of the height of houses to reinforce the house change detection, the reliability and efficiency of detection methods will be improved greatly.From this viewpoint, a new approach taking advantage of both height data from an image pair and image data is proposed to detect the house change in urban area and is called 'data fusion technology'. | Fan Hong Zhang Jianqing Zhang Zuxun Liu Zhifang | 1999 | Geo-Spatial Information Science1999，2，1： | 1 |
| 17 | A Robust Method for Semi-automatic Extraction of Road Centerlines Using a Piecewise Parabolic Model and Least Square Template Matching显示文摘 | HU Xiangyun ZHANG Zuxun TAO C V | 2004 | Photogrammetric Engineering & Remote Sensing2004，70，12： | 1 |
| 18 | Photogram- metric modeling of linear features with generalized point pho- togrammetry显示文摘 | Zhang Zuxun Zhang Yongjun Zhang Jianging | 2008 | Photogrammetric Engineering and Remote Sens- ing2008，74，9： | 1 |
| 19 | An Approach of Semiautomated Road Extraction from Aerial Image Based on Template Matching and Neural Network显示文摘 | HU Xiangyun ZHANG Zuxun ZHANG Jiangqing | 2000 | International Archives of Photogrammetry and Remote Sensing2000，33，3： | 1 |
| 20 | A Robust Technique for Matching Two Uncalibrated Images Through the Recovery of the Unknown Epipolar Geometry显示文摘 | Zhang Zuxun Derche R Faugeras O | 1995 | Artificial Intelligence1995，78，12： | 1 |
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