搜索结果: 121-135 共查到“工学 point clouds”相关记录170条 . 查询时间(0.077 秒)
Crop height determination with UAS point clouds
UAS-Photogrammetry 3D-Point Cloud Crop Surface Models
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2014/12/4
The accurate determination of the height of agricultural crops helps to predict yield, biomass etc. These relationships are of great importance not only for crop production but also in grassland manag...
A DATA DRIVEN METHOD FOR BUILDING RECONSTRUCTION FROM LiDAR POINT CLOUDS
3D building model Building extraction Segmentation Edge points detection Line approximation
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2014/12/1
Airborne laser scanning, commonly referred to as LiDAR, is a superior technology for three-dimensional data acquisition from Earth's surface with high speed and density. Building reconstruction is one...
Scalable and Detail-Preserving Ground Surface Reconstruction from Large 3D Point Clouds Acquired by Mobile Mapping Systems
Surface reconstruction LiDAR geometry urban mobile mapping
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2014/9/9
The currently existing mobile mapping systems equipped with active 3D sensors allow to acquire the environment with high sampling rates at high vehicle velocities. While providing an effective solutio...
A Distance-Weighted Graph-Cut Method for the Segmentation of Laser Point Clouds
Graph cut segmentation laser point cloud
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2014/9/9
Normalized Cut according to (Shi and Malik 2000) is a well-established divisive image segmentation method. Here we use Normalized Cut for the segmentation of laser point clouds in urban areas. In part...
Automatic Single Tree Detection in Plantations using UAV-based Photogrammetric Point clouds
Single Tree Detection UAV Palm plantation Structure From Motion Point Clouds Segmentation Terrain Models
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2014/9/9
For reasons of documentation, management and certification there is a high interest in efficient inventories of palm plantations on the single plant level. Recent developments in unmanned aerial vehic...
Integration of Image Data for Refining Building Boundaries Derived from Point Clouds
Refinement projective geometry roof topology graph shortest cycles
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2014/9/9
Geometrically and topologically correct 3D building models are required to satisfy with new demands such as 3D cadastre, map updating, and decision making. More attention on building reconstruction ha...
Comparision of photogrammetric point clouds with BIM building elements for construction progress monitoring
Photogrammetric point clouds construction site monitoring building model
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2014/9/9
For construction progress monitoring a planned state of the construction at a certain time (as-planed) has to be compared to the actual state (as-built). The as-planed state is derived from a building...
Automated Extraction of 3D Trees from Mobile LiDAR Point Clouds
Mobile LiDAR Tree Extraction Shape Context Segmentation Point Cloud
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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...
Filtering of Point Clouds from Photogrammetric Surface Reconstruction
Point Clouds Photogrammetry Laser Scanning Surface Reconstruction Filtering Big Data
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2014/7/30
The density and data volumes for recorded 3D surfaces increase steadily. In particular during photogrammetric surface reconstruction and laser scanning applications these volumes often exceed the limi...
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
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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...
Accuracy assessment of building point clouds automatically generated from iphone images
Registration Iterative Closest Points (ICP) Point Clouds LIDAR, Smartphone iPhone 3D City Models Terrestrial Laser Scanning (TLS) Structure from Motion (SfM) Bundle Adjustment Multi-view Photogrammetry Low-cost sensors
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2014/7/30
Low-cost sensor generated 3D models can be useful for quick 3D urban model updating, yet the quality of the models is questionable. In this article, we evaluate the reliability of an automatic point c...
A New Framework For Interactive Segmentation of Point Clouds
Point Cloud Segmentation User Visualization Algorithms
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2014/7/30
Point cloud segmentation is a fundamental problem in point processing. Segmenting a point cloud fully automatically is very challenging due to the property of point cloud as well as different requirem...
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
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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
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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
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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...