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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...
APPLICABILITY ANALYSIS OF CLOTH SIMULATION FILTERING ALGORITHM FOR MOBILE LIDAR POINT CLOUD
LiDAR point cloud Cloth simulation filtering Mobile laser scanning Ground points Non-ground points
2018/5/11
Classifying the original point clouds into ground and non-ground points is a key step in LiDAR (light detection and ranging) data post-processing. Cloth simulation filtering (CSF) algorithm, which bas...
A VOXEL-BASED FILTERING ALGORITHM FOR MOBILE LIDAR DATA
Mobile LiDAR filtering voxelization upward growing curvature
2018/5/15
This paper presents a stepwise voxel-based filtering algorithm for mobile LiDAR data. In the first step, to improve computational efficiency, mobile LiDAR points, in xy-plane, are first partitioned in...
A THRESHOLD-FREE FILTERING ALGORITHM FOR AIRBORNE LIDAR POINT CLOUDS BASED ON EXPECTATION-MAXIMIZATION
Airborne LiDAR Point clouds Filtering Ground points Expectation-maximization Intensity
2018/5/14
Filtering is a key step for most applications of airborne LiDAR point clouds. Although lots of filtering algorithms have been put forward in recent years, most of them suffer from parameters setting o...
MUTUAL COMPARATIVE FILTERING FOR CHANGE DETECTION IN VIDEOS WITH UNSTABLE ILLUMINATION CONDITIONS
Change detection moving object detection illumination changes mutual comparative filters
2016/7/27
In this paper we propose a new approach for change detection and moving objects detection in videos with unstable, abrupt illumination changes. This approach is based on mutual comparative filters and...
UNDERWATER 3D MODELING: IMAGE ENHANCEMENT AND POINT CLOUD FILTERING
Underwater Photogrammetry 3D Modeling Image Enhancement
2016/7/8
This paper examines the results of image enhancement and point cloud filtering on the visual and geometric quality of 3D models for the representation of underwater features. Specifically it evaluates...
CROWDSOURCING BIG TRACE DATA FILTERING: A PARTITION-AND-FILTER MODEL
Crowdsourcing traces Trace partitioning GPS trace filtering
2016/7/8
GPS traces collected via crowdsourcing way are low-cost and informative and being as a kind of new big data source for urban geographic information extraction. However, the precision of crowdsourcing ...
TUNNEL POINT CLOUD FILTERING METHOD BASED ON ELLIPTIC CYLINDRICAL MODEL
Elliptic Cylindrical Model Point Cloud Filtering Tunnel Central Axis Non-points Regional Segmentation
2016/7/5
The large number of bolts and screws that attached to the subway shield ring plates, along with the great amount of accessories of metal stents and electrical equipments mounted on the tunnel walls, m...
PERFORMANCE EVALUATION OF DIFFERENT GROUND FILTERING ALGORITHMS FOR UAV-BASED POINT CLOUDS
Point Cloud Ground Filtering Unmanned Aerial Vehicle Aerial Photo Digital Elevation Model Adaptive TIN
2016/7/4
Digital Elevation Model (DEM) generation is one of the leading application areas in geomatics. Since a DEM represents the bare earth surface, the very first step of generating a DEM is to separate the...
Applying two dimensional Kalman Filtering for Digital Terrain Modelling
Applying two dimensional Kalman Filtering Digital Terrain Modelling
2016/5/23
Digital Elevation Models (DEMs) have been increasingly used to model the terrain surfaces to provide the 'physical bases' for environmental studies. However, DEM is subject to systematic errors, rando...
FILTERING OF TLS POINT CLOUDS FOR THE GENERATION OF DTM IN SALT-MARSH AREAS.
Terrestrial Laser Scanner DTM data clustering salt-marsh ecogeomorphic dynamics
2016/2/29
Marshes are ubiquitous landforms in estuaries and lagoons, where important hydrological, morphological and ecological processes
take place. These areas attenuate sea action on the coast and act as s...
INTEGRATION OF FULL-WAVEFORM INFORMATION INTO THE AIRBORNE LASER SCANNING DATA FILTERING PROCESS
DTM Filtering Full-waveform Laser scanning Lidar
2016/2/29
Terrain classification of current discrete airborne laser scanning data requires filtering algorithms based on the spatial relationship
between neighbouring three-dimensional points. However, diffic...
LIDAR FILTERING ALGORITHMS FOR URBAN FLOOD APPLICATION: REVIEW ON CURRENT ALGORITHMS AND FILTERS TEST
LiDAR Filtering Algorithm Digital terrain model (DTM) Urban flood modelling Classification Urban Flood
2016/2/29
Digital terrain model (DTM) is one of the important input parameters in urban flood application. This is because it influences the
flow direction, flow velocity, flood extend and flood depth. LiDAR ...
Protect both Integrity and Confidentiality in Outsourcing Collaborative Filtering Computations
Collaborative filtering Outsourcing Integrity
2016/2/24
In the cloud computing era, in order to avoid the computational burdens, many recommendation service providers tend to outsource their collaborative filtering computations to third-party cloud servers...
Inverse Calibration of LiDAR Filtering Parameters: UCODE_2005/GRASS Integration
LiDAR Filtering Calibration Accuracy GRASS UCODE
2016/1/25
The paper presents a procedure developed to calibrate the value of parameters used in algorithms that perform LiDAR’s data
filtering.