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Wysłany: Pią 18:58, 05 Lis 2010
Temat postu: ugg boots sale Dynamic laser mapping data processi
Dynamic laser mapping data processing system
System,
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, 65 weeks, the scanner can capture millions of data points, constitute a point cloud. The data processing system used in Figure 4 after the facade of geometric information, including more than 230,000 effective space data points. Can be further extracted characteristic line of the building shown in Figure 5, the height and CCD imaging to obtain information, you can direct three-dimensional modeling and visualization. Figure 3, the original image map Fig. 3Imageofbuilding elevation information graph in Figure 4 Fig. 4Pi-ofileinformation characteristic line diagram in Figure 5 Fig. 5Featureline reconstruction block diagram in Figure 6 Fig. 63Dmodelofstreel on the district and the street running down the street is generally observed, the streets were collected on both sides of the building. Scan data processing in accordance with the order processing and extraction, and then both sides of the geometric information on the correct match, a high degree of information extraction can be carried out after the three-dimensional reconstruction. Figure 6 is the use of information extracted features of the system to model the block as part of the results. 4 Conclusion The laser scanning system is the second GPS location technology space mapping technology after another innovation. The dynamic laser mapping system using 2-dimensional laser scanner to quickly and easily obtain the ground and the building facade information, in the establishment of 3-D models of buildings, number of cities such as greater flexibility and advantages. The subject of research and development of their own data processing system to quickly and efficiently extract the three-dimensional geometric information needed for modeling, the accuracy can meet the accuracy requirements 1:2000 mapping, the system has broad application prospects. This topic will be adaptive algorithm, automatically and quickly extract the geometric features and three-dimensional reconstruction further study. References: [1] Manandhar,
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, D. , Shibasaki, R. Vehide. borneLaserMappingSystem (VLMS) for3-DUrbanGISDatabase [J]. 7thInt'IComputersinUrbanPlanningandUrbanManagementConf, 2001 (7) :18-20. [2] LIShukai, LIUShaochuang. ProgressinMobile / AirborneLaserRanging / Multispeetral-ImagingMappingSystem [J]. ChinaJournalofImageandGraphics, 1999,4 (A): 89 ~ 94. [3] SURVEYING, Qingquan, etc., car plant type city letter. g-acquisition and three-dimensional modeling system [J]. Wuhan University (Engineering Science), 2003,36 (3): 76 ~ 8O. [4] A few KERMANNF. AirborneLaserScanning: PresentStatusandFutureExpectations [J]. ISPRSJournal0fPhotogram-metryandRemoteSensing, 1999, (54) :64 - 67. [5] Hong-jian, Li Shukai. Laser sampling sites based on sparse building extraction [J]. Graduate University Chinese Academy of Sciences, 2001,18 (2) :154 - 159. [6] Xufeng Liang, Li Shukai. Scanning laser range finder based on the air in the building of the automatic extraction of images [J]. Remote Sensing, 1999,
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,3 (3): 171 ~ 174. [7] Libi Jun, Fang Zhixiang, et al. From laser scanning data for building feature extraction [J]. Information Science of Wuhan University, 2003,28 (1): 65 ~ 7O. [8] Manandhar,
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, D. , Shibasaki, R. FeatureExtractionfromRangeData, 22ndAsianConferenceonRemoteSensing (ACRS2001) [Z]. 2001:5 9. [9] Shi Wenzhong, Li Bijun, Qingquan. Vehicle based on the projection laser scanning point density range image segmentation [J]. University of Surveying and Mapping, 2005,34 (2): 95 ~ 100. [10] Wang Jian, Jin Fengxiang,
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, Ding Shifei. Building Facade measurement based on laser scanner data pre-processing technique [J]. Computer Engineering and Applications, 2003,39 (31): 27 ~ 29.
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