MyJournals Home  

RSS FeedsSensors, Vol. 19, Pages 4546: Outdoor Scene Understanding Based on Multi-Scale PBA Image Features and Point Cloud Features (Sensors)

 
 

19 october 2019 11:00:36

 
Sensors, Vol. 19, Pages 4546: Outdoor Scene Understanding Based on Multi-Scale PBA Image Features and Point Cloud Features (Sensors)
 


Outdoor scene understanding based on the results of point cloud classification plays an important role in mobile robots and autonomous vehicles equipped with a light detection and ranging (LiDAR) system. In this paper, a novel model named Panoramic Bearing Angle (PBA) images is proposed which is generated from 3D point clouds. In a PBA model, laser point clouds are projected onto the spherical surface to establish the correspondence relationship between the laser ranging point and the image pixels, and then we use the relative location relationship of the laser point in the 3D space to calculate the gray value of the corresponding pixel. To extract robust features from 3D laser point clouds, both image pyramid model and point cloud pyramid model are utilized to extract multiple-scale features from PBA images and original point clouds, respectively. A Random Forest classifier is used to accomplish feature screening on extracted high-dimensional features to obtain the initial classification results. Moreover, reclassification is carried out to correct the misclassification points by remapping the classification results into the PBA images and using superpixel segmentation, which makes full use of the contextual information between laser points. Within each superpixel block, the reclassification is carried out again based on the results of the initial classification results, so as to correct some misclassification points and improve the classification accuracy. Two datasets published by ETH Zurich and MINES ParisTech are used to test the classification performance, and the results show the precision and recall rate of the proposed algorithms.


 
210 viewsCategory: Chemistry, Physics
 
Sensors, Vol. 19, Pages 4547: An Innovative Technique for Identification of Missing Persons in Natural Disaster Based on Drone-Femtocell Systems (Sensors)
Sensors, Vol. 19, Pages 4545: Fast and Robust Monocular Visua-Inertial Odometry Using Points and Lines (Sensors)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Physics


Copyright © 2008 - 2024 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten