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基于三维点云的同时定位与建图(Simultaneous Localization and Mapping, SLAM)是机器人导航与定位领域重要的技术之一. 然而具有回环检测功能的这类SLAM系统仍鲜见于文献中. 本文首先提出了一种新的基于三维点云的室外SLAM 系统的框架, 该框架由里程计, 回环检测, 位姿优化三部分组成. 其次针对回环检测，我们提出一种基于点云片段匹配约束的方法提升回环检测的...
基于自治布尔网络的高速物理随机数发生器研究
自治布尔网络 混沌 高速物理随机数发生器
2019/3/6
利用确定性的数学算法可产生快速伪随机数，然而其具有可预测性，难以确保信息安全。从混沌物理熵源中提取的物理随机数具有统计无偏和不可预测性，但是受限于传统混沌电路的带宽瓶颈，随机数的实时产生速率无法有效提高，为此，设计实现一种基于自治布尔网络的宽带混沌振荡器。研究结果表明：利用该装置可产生速率达10 Gbit/s的物理随机数序列；所产生的物理随机数序列具有良好的随机统计特性；该装置可便捷地应用于数据加...
A COMPARATIVE STUDY AMONG THREE REGISTRATION ALGORITHMS: PERFORMANCE, QUALITY ASSURANCE AND ACCURACY
Accuracy Automation Least Squares Registration'Terrestrial Laser Scanning
2019/3/4
A critical task in every terrestrial laser scanning project is the transformation (addressed to as registration or alignment) of multiple point clouds into a common reference system. Even though this ...
THE SUITABILITY OF TERRESTRIAL LASER SCANNING FOR BUILDING SURVEY AND MAPPING APPLICATIONS
Terrestrial Laser Scanning Handheld Mobile Laser Scanning Building Survey Mapping
2019/3/4
The popularity of Terrestrial Laser Scanner (TLS) has been introduced into a field of surveying and has increased dramatically especially in producing the 3D model of the building. The used of terrest...
COMPARISON WITH ACCURACY OF TERRESTRIAL LASER SCANNER BY USING POINT CLOUD ALIGNED WITH SHAPE MATCHING AND BEST FITTING METHODS
laser scanning time of flight phase shift shape matching natural distributions Ostia
2019/3/4
Recently operation systems of laser scanning have been obviously improved; for instance shape matching has been equipped with software on a post processing stage so measurement without any targets is ...
TERRESTRIAL LASER SCANNER AND FAST CHARACTERIZATION OF SUPERFICIAL LESIONS IN ARCHITECTURAL DIAGNOSIS
errestrial laser scanner pathology defensive towers masonry Camarles Tower
2019/3/1
The development of massive data captures techniques (MDC) in recent years, such as the Terrestrial Laser Scanner (TLS), raises the possibility of developing new assessment procedures for architectural...
THE SURVEY OF THE SAN FRANCESCO BRIDGE BY SANTIAGO CALATRAVA IN COSENZA, ITALY
Laser scanner Line scanner Structure monitoring Deformation Dynamic measurements
2019/2/28
The paper deals with two kinds of surveying carried out by using the Terrestrial Laser Scanner (TLS). The object of the surveys is the new San Francesco Bridge of Santiago Calatrava in Cosenza, Italy....
3D CITYGML BUILDING MODELLING FROM LIDAR POINT CLOUD DATA
LiDAR point cloud, CityGML LoD1 LoD Smart Cities D building model
2019/2/27
With recent government initiatives for smart cities, 3D virtual city models are in demand for managing and monitoring the urban infrastructure. 3D building models forms an important component of 3D vi...
AUTOMATED BUILDING DETECTION USING RANSAC FROM CLASSIFIED LIDAR POINT CLOUD DATA
LiDAR RANSAC Building Detection Plane Detection Python LAS Point Cloud
2018/11/8
For the past 10 years, the Philippines has seen and experienced the growing force of different natural disasters and because of this the Philippine governement started an initiative to use LiDAR techn...
THE SUITABILITY OF TERRESTRIAL LASER SCANNING FOR STRATA BUILDING
Terrestrial Laser Scanning Strata building
2018/11/8
During the recent years, the used of terrestrial laser scanning (TLS) is becoming rapidly popular because of its ability in several applications, especially the ability to observe complex documentatio...
The rapid development of a country has resulted in limited land use. This is indirectly encouraging multilayer development (strata) especially for the development of residential properties such as con...
COMPARING THE PERFORMANCE OF POINT CLOUD REGISTRATION METHODS FOR LANDSLIDE MONITORING USING MOBILE LASER SCANNING DATA
point clouds, registration methods landslide monitoring mobile laser scanning deviation maps
2018/11/8
The aim of the research is to evaluate the performance of the point cloud registration methods using mobile laser scanning data. The point cloud registration methods involved in this research are matc...
干气密封螺旋槽的激光加工工艺研究
干气密封 螺旋槽 激光加工 加工工艺
2019/1/21
干气密封环螺旋槽的加工质量对干气密封性能有非常显著的影响。为了获得较高的螺旋槽加工质量，并能对螺旋槽加工工艺提供有效指导，利用LM-20型光纤激光标刻机对干气密封常用的碳化硅（SiC）陶瓷材料和碳化钨（WC）硬质合金材料进行了螺旋槽激光加工工艺研究。分别考察了激光功率、扫描速度、填充间距、重复频率、标刻次数等工艺参数对螺旋槽深度hg和底表面粗糙度Ra的影响；并选用激光功率、扫描速度、重复频率、标刻...
MULTIGRID CELL SHAPE EVALUATION IN DTM FILTERING OF MOBILE LIDAR POINT CLOUDS
Point cloud Mobile LiDAR Digital terrain models Filtering Delaunay triangulation
2018/11/9
The georeferenced information acquisition for large scales digital terrain models generation is usually a rather time-consuming and costly process. The use of point clouds gathered by mobile LiDAR sys...
IMAGE-BASED METHOD FOR THE PAIRWISE REGISTRATION OF MOBILE LASER SCANNING POINT CLOUDS
pairwise registration relative registration image registration template matching
2018/11/9
In this paper, a method is proposed for solving relative translations of 3D point clouds collected by Mobile Laser Scanning (MLS) techniques. The proposed approach uses the attributes of the 3D points...