A NEW APPROACH TO THE DESIGN OF A SYSTEM FOR FEATURE EXTRACTION BASED ON HUMAN-COMPUTER COLLABORATIVE TACTIC     

TAO Chuang LIN ZongjianTAO Chuang  Doctoral Candidate  School of Information Engineering  WTUSM  Wuhan  China   《地球空间信息科学学报》1998,(1)

We are involved in an embarrassing situation that the limited capa-bility of automated feature extraction in digital photogrammetric systems cannotsatisfy the increasing needs for rapid acquisition of semantic information for appli-cations.Facing this challenge,a new tactic,Human-Computer Collaborative（HCC）tactic,and a corresponding new method,Operator-Object Directed（OOD）method,are proposed for the design of a system for feature extractionfrom large scale aerial images.We hold that in almost all technical complex sys-tems,full automation will be neither technically feasible nor socially acceptable.The system should be designed to optimize through the cooperative operation withtwo agents in the system:the human and the computer.  相似文献   

基于相关分析的粗差可区分性     

陶本藻  姚宜斌  施闯 《武汉大学学报(信息科学版)》2004,29(10):881-884

提出了应用偏相关系数来区分多维粗差和用复相关系数对多维粗差总体显著性进行检验并定位的方法。反复计算这些相关系数并进行检验,可以相对正确地进行多维相关观测的粗差定位。  相似文献   

A mathematical basis for the convergence of the capacity spectrum method     

Yu‐Yuan Lin  Tsai‐Fu Chuang  Kuo‐Chung Chang 《地震工程与结构动力学》2004,33(9):1059-1066

The capacity spectrum method is adopted by the ATC‐40 document for evaluating the inelastic deformation demands of reinforced concrete structures. Several studies have shown that the iterative procedure needed in the method may not give convergent outcomes in some cases. This paper focuses on the convergence of the capacity spectrum method in the constant velocity region of the response spectrum. The results obtained from the examples discussed in this study show that the convergent characteristics of this method depend on the elastic period, the hysteretic damping model, the yield displacement and the ductility ratio of the system analyzed. The capacity spectrum method can converge only for the case that the absolute value of the first derivative of the government equation derived from the demand and capacity diagrams of structures is smaller than 1.0. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

ITRF97参考框架下的中国大陆区域地壳板块运动背景场的建立及应用   总被引：6，自引：0，他引：6  

姚宜斌  刘经南  施闯  陶本藻 《武汉大学学报(信息科学版)》2002,27(4):363-366,376

利用中国地壳运动观测网络工程基准站和基本站的GPS实测结果，构造了一个ITRF参考框架下的、充分反映今板块运动特征的、更为精确的现状中国大陆区域板块运动模型，介绍了这一工作的思路、方法和最终结果，并对速度场结果作了初步的解释。  相似文献   

Multi—quadric Equations Interpolation and Its Applications to the Establishment of Crustal Movement Speed Field     

YAOYibin  LIUJingnan 《地球空间信息科学学报》2002,5(2):1-5

In this paper,multiquadric equations interpolation is used to establish a widely covered and valuable speed field model,with which the crustal movement image is obtained.  相似文献   

高精度GPS网数据处理中的系统误差分析   总被引：14，自引：2，他引：14  

施闯  刘经南  姚宜斌 《武汉大学学报(信息科学版)》2002,27(2):148-152

分析了高精度GPS网系统误差产生的原因和分类，推导了消除和估计GPS网系统误差的整体平差函数模型。  相似文献   

利用SPOT影象提取高程信息的研究     

舒宁  林宗坚  陶闯 《武汉大学学报(信息科学版)》1992,(2)

本文从理论上分析了以全数字化方法从SPOT影象提取高程信息关键环节上的问题和所采取的方法。根据影象成象特点,采用时序变化的外方位元素数学模型,其中精确选取控制点、合理选取初值和确定等效焦距、线元素和角元素分开解算迭代是十分重要的措施。采用新的数据组织方法可以避免高程内插中的精度损失。利用卫星影象特点,实现由粗到精的多级影象匹配,同时引人改化的高精度最小二乘匹配,使整个匹配过程既保障了可靠性又满足精度要求。马赛地区SPOT象对窗的DEM生成结果表明,在影象质量得到保证,时差不大的前提下,可以达到10米高程精度。  相似文献   

一种SPOT影像参数动态筛选的最小二乘匹配方法     

陶闯 《武汉大学学报(信息科学版)》1993,(2)

本文从参数估计的角度出发,把最小二乘影像匹配(LSM)问题看作具有附加系统参数的平差问题。文中在理论研究和实验分析的基础上,指出附加参数选择是影响LSM匹配质量的主要因素之一。因此,文中提出了基于假设检验的参数动态筛选LSM 算法。通过SPOT影像匹配实验比较,证实了参数动态筛选对改善LSM质量有效。  相似文献   

影像分维估计方法的研究   总被引：5，自引：0，他引：5  

陶闯  林宗坚 《测绘学报》1993,22(3):177-184

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Sedimentary characteristics of tide-dominated estuary in Donghetang Formation(Upper Devonian), central Tarim Basin     

WANG Li-ping  LI Chuang  TANG Bing-yong 《世界地质(英文版)》2005,8(1)

The Donghetang Formation (Upper Devonian) in central Tarim Basin has been thought an important oil and gas reservoir since the abundant oil and gas resources were found in the wells W16, W20, W34, and other fields. However, the sedimentary environment of the Donghetang Formation has been disputed because it suffered from both tidal and fluvial actions and there were not rich fossils in the sandstone. After the authors analyzed sedimentary features by means of drill cores, well logging data, paleosols, and with SEM obseruations, three kinds of sedimentary environments were distinguished: alluvial fan, tide-dominated estuary, and shelf. Particularly, the sedimentary features of tide-dominated estuary were studied in detail. Besides, the authors discussed sedimentary characteristics of the Donghetang Formation which was divided into two fourth-order sequences and five system tracts. At the same time, according to the forming process of five system tracts, the whole vertical evolution and lateral transition of tide-dominated estuary were illustrated clearly. Finally, the reservoir quality was evaluated based on porosity and permeability.  相似文献