搜索结果: 1-15 共查到“光学工程 point clouds”相关记录19条 . 查询时间(0.093 秒)
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...
FROM POINT CLOUDS TO 3D ISOVISTS IN INDOOR ENVIRONMENTS
Visibility graphs Path complexity Spatial analysis
2018/11/9
Visibility is a common measure to describe the spatial properties of an environment related to the spatial behaviour. Isovists represent the space that can be seen from one observation point, and they...
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...
RECONSTRUCTION OF 3D MODELS FROM POINT CLOUDS WITH HYBRID REPRESENTATION
Point Clouds Segmentation 3D Reconstruction Super-voxel Hybrid Representation
2018/6/4
The three-dimensional (3D) reconstruction of urban buildings from point clouds has long been an active topic in applications related to human activities. However, due to the structures significantly d...
CLASSIFICATION OF MOBILE LASER SCANNING POINT CLOUDS OF URBAN SCENES EXPLOITING CYLINDRICAL NEIGHBOURHOODS
Point clouds Mobile Laser Scanning Classification Feature extraction Cylindrical Approach 3D Mapping
2018/6/5
This paper presents our work on automated classification of Mobile Laser Scanning (MLS) point clouds of urban scenes with features derived from cylinders around points of consideration. The core of ou...
VALIDATING A WORKFLOW FOR TREE INVENTORY UPDATING WITH 3D POINT CLOUDS OBTAINED BY MOBILE LASER SCANNING
Tree inventory Mobile Laser Scanning Point Cloud Data Tree classification
2018/6/5
Urban trees are an important component of our environment and ecosystem. Trees are able to combat climate change, clean the air and cool the streets and city. Tree inventory and monitoring are of grea...
AUTOMATED CALIBRATION OF FEM MODELS USING LIDAR POINT CLOUDS
Point clouds LiDAR rasterization FEM analysis bending moment torque
2018/6/5
In present work it is pretended to estimate elastic parameters of beams through the combined use of precision geomatic techniques (laser scanning) and structural behaviour simulation tools. The study ...
METHODS FOR THE AUTOMATIC GEOMETRIC REGISTRATION OF TERRESTRIAL LASER SCANNER POINT CLOUDS IN FOREST STANDS
Terrestrial laser scanning forest stands registration sphere extraction tree axes
2016/2/29
A combined analysis of multiple terrestrial laser scanner point clouds recorded from different positions requires a geometric
registration of these scans. In most applications of terrestrial laser s...
EFFICIENT HOUGH TRANSFORM FOR AUTOMATIC DETECTION OF CYLINDERS IN POINT CLOUDS
Cylinder detection Object recognition Hough Transform Reverse Engineering
2015/8/13
We present an efficient Hough transform for automatic detection of cylinders in point clouds. As cylinders are one of
the most frequently used primitives for industrial design, automatic and ro...
FILTERING OF AIRBORNE LASER SCANNER DATA BASED ON SEGMENTED POINT CLOUDS
Segmentation Filtering Laser scanning LiDAR
2015/8/13
The extraction of points on the bare Earth from point clouds acquired by airborne laser scanning is the most time consuming and
expensive part in the production of digital elevation models with laser...
Automated Extraction of 3D Trees from Mobile LiDAR Point Clouds
Mobile LiDAR Tree Extraction Shape Context Segmentation Point Cloud
2014/7/30
This paper presents an automated algorithm for extracting 3D trees directly from 3D mobile light detection and ranging (LiDAR) data. To reduce both computational and spatial complexities, ground point...
Evaluations of Three-Dimensional Building Model Reconstruction from LiDAR Point Clouds and Single-View Perspective Imagery
3D Building Model Reconstruction LiDAR Single View Reconstruction Image-based Reconstruction Close-range Photogrammetry
2014/7/30
This paper briefly presents two approaches for effective three-dimensional (3D) building model reconstruction from terrestrial laser scanning (TLS) data and single perspective view imagery and assesse...
Semi-automatic extraction of sectional view from point clouds – The case of Ottmarsheim's abbey-church
Cultural heritage terrestrial laser scanning automation extraction reconstruction assessment
2014/7/30
Today, elevations or sectional views of buildings are often produced from terrestrial laser scanning. However, due to the amount of data to process and because usually 2D maps are required by customer...
3D Modeling By Consolidation Of Independent Geometries Extracted From Point Clouds – The Case Of The Modeling Of The Turckheim's Chapel (Alsace, France)
3D Modeling 3D CAD geometric consolidation cultural heritage
2014/7/30
In the heart of the Alsatian vineyard, this city has many historical monuments including its old church. To understand the effectiveness of the project described in this paper, it is important to have...
Congruence analysis of point clouds from unstable stereo image sequences
Stereo image matching 3D point tracking congruence analysis
2014/7/30
This paper deals with the correction of exterior orientation parameters of stereo image sequences over deformed free-form surfaces without control points. Such imaging situation can occur, for example...