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CAMERA CALIBRATION ACCURACY AT DIFFERENT UAV FLYING HEIGHTS
Camera calibration accuracy assessment object distances UAV flying heights
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2017/4/6
Unmanned Aerial Vehicles (UAVs) can be used to acquire highly accurate data in deformation survey, whereby low-cost digital cameras are commonly used in the UAV mapping. Thus, camera calibration is co...
IMPACT OF BUILDING HEIGHTS ON 3D URBAN DENSITY ESTIMATION FROM SPACEBORNE STEREO IMAGERY
Urban Density Building Density 3D Density Building Height Floor Area Ratio Stereo Imagery Impact
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2016/7/28
In urban planning and design applications, visualization of built up areas in three dimensions (3D) is critical for understanding building density, but the accurate building heights required for 3D de...
ASSESSMENT OF LIDAR-DERIVED TREE HEIGHTS ESTIMATED FROM DIFFERENT FLIGHT ALTITUDE DATA IN MOUNTAINOUS FORESTS WITH POOR LASER PENETRATION RATES
Forestry Remote Sensing LIDAR Laser scanning DEM/DTM
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2015/11/10
In this study, the effects of different flight altitudes on tree height estimates with a small-footprint scanning lidar were investigated and assessed in mountainous forests with poor laser penetratio...
CALIBRATION OF STATIONARY CAMERAS BY OBSERVING OBJECTS OF EQUAL HEIGHTS ON A GROUND PLANE
Camera Calibration Estimation
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2015/6/1
The image coordinates of the
corresponding foot and head points of these objects serve as observations. For the interior and exterior orientation of the
camera a minimal parametrization is introduce...
ESTIMATING INDIVIDUAL TREE HEIGHTS OF THE BOREAL FOREST USING AIRBORNE LASER ALTIMETRY AND DIGITAL VIDEOGRAPHY
Laser altimetry Tree Height Boreal Forest Videography
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2014/12/22
Estimation of tree heights for large territories is either expensive if done in the field or imprecise when accomplished through automated stereophotogrammetry. While scanning laser altimetry provides...
IMPLEMENTATION OF THE DISTRIBUTED PARALLEL PROGRAM FOR GEOID HEIGHTS COMPUTATION USING MPI AND OPENMP
Distributed parallel computing Geoid heights computation MPI OpenMP Diskless-based PC Cluster
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2014/4/28
Much research have been carried out using optimization algorithms for developing high-performance program, under the parallel computing environment with the evolution of the computer hardware technolo...