Journal ArticleDOI
Filtering airborne laser scanning data with morphological methods
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TLDR
The experimental test results show that this method performs well for most sites, except those with missing data due to the lack of overlap between swaths, and shows encouraging results for laser data with low pulse density.Abstract:
Filtering methods based on morphological operations have been developed in some previous studies. The biggest challenge for these methods is how to keep the terrain features unchanged while using large window sizes for the morphological opening. Zhang et al. (2003) tried to achieve this goal, but their method required the assumption that the slope is constant. This paper presents a new method to achieve this goal without such restrictions, and methods for filling missing data and removing outliers are proposed. The experimental test results using the ISPRS Commission III/WG3 dataset show that this method performs well for most sites, except those with missing data due to the lack of overlap between swaths. This method also shows encouraging results for laser data with low pulse density.read more
Citations
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Journal ArticleDOI
An Easy-to-Use Airborne LiDAR Data Filtering Method Based on Cloth Simulation
TL;DR: This paper presents a new filtering method which only needs a few easy-to-set integer and Boolean parameters and may help the users without much experience to use LiDAR data and related technology in their own applications more easily.
Journal ArticleDOI
Airborne LiDAR for DEM generation: some critical issues
TL;DR: This paper reviews the recent advances of airborne LiDAR systems and the use ofLiDAR data for DEM generation, with special focus on LiD AR data filters, interpolation methods, DEM resolution, and LiDar data reduction.
Journal ArticleDOI
Ground Filtering Algorithms for Airborne LiDAR Data: A Review of Critical Issues
TL;DR: This review highlights three feature types for which current ground filtering algorithms are suboptimal, and which can be improved upon in future studies: surfaces with rough terrain or discontinuous slope, dense forest areas that laser beams cannot penetrate, and regions with low vegetation that is often ignored by ground filters.
Journal ArticleDOI
Isolating individual trees in a savanna woodland using small footprint lidar data
TL;DR: In this paper, a new method of detecting individual treetops from lidar data and applying marker-controlled watershed segmentation into isolating individual trees in savanna woodland is presented.
Journal ArticleDOI
Revised method for forest canopy height estimation from Geoscience Laser Altimeter System waveforms
TL;DR: In this article, the authors used a combination of waveform height indices and slope indices from a digital elevation model (DEM) to estimate forest canopy height on a sloped terrain.
References
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Book
Morphological Image Analysis: Principles and Applications
TL;DR: This self-contained volume will be valuable to all engineers, scientists, and practitioners interested in the analysis and processing of digital images.
Journal ArticleDOI
Determination of terrain models in wooded areas with airborne laser scanner data
K. Kraus,Norbert Pfeifer +1 more
TL;DR: In this article, the characteristics of laser scanning are compared to photogrammetry with reference to a big pilot project and the results are in accordance with the expectations, however, the geomorphologic quality of the contours, computed from a terrain model derived from laser scanning, needs to be improved.
Journal ArticleDOI
Experimental comparison of filter algorithms for bare-Earth extraction from airborne laser scanning point clouds
G. Sithole,George Vosselman +1 more
TL;DR: In general, filters that estimate local surfaces are found to perform best and should be directed towards the usage of additional data sources, segment-based classification, and self-diagnosis of filter algorithms.
Journal ArticleDOI
A progressive morphological filter for removing nonground measurements from airborne LIDAR data
TL;DR: A progressive morphological filter was developed to detect nonground LIDAR measurements and shows that the filter can remove most of the nong round points effectively.
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Experimental comparison of filter algorithms for bare-Earth extraction from airborne laser scanning point clouds
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