Journal
SENSORS
Volume 19, Issue 24, Pages -Publisher
MDPI
DOI: 10.3390/s19245450
Keywords
pedestrian detection; feature correlation analysis; laser scanner; track classification; probability data association filter
Funding
- National Key R&D Program of China [2018YFB1600500]
- National Natural Science Foundation of China [51905007, 51775053, 61603004]
- Great Wall Scholar Program [CITTCD20190304]
- Ability Construction of Science, Beijing Key Lab Construction Fund [PXM2017-014212-000033]
- NCUT start-up fund
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Pedestrian detection is a critical perception task for autonomous driving and intelligent vehicle, and it is challenging due to the potential variation of appearance and pose of human beings as well as the partial occlusion. In this paper, we present a novel pedestrian detection method via four-layer laser scanner. The proposed approach deals with the occlusion problem by fusing the segment classification results with past knowledge integration from tracking process. First, raw point cloud is segmented into the clusters of independent objects. Then, three types of features are proposed to capture the comprehensive cues, and 18 effective features are extracted with the combination of the univariate feature selection algorithm and feature correlation analysis process. Next, based on the segment classification at individual frame, the track classification is conducted further for consecutive frames using particle filter and probability data association filter. Experimental results demonstrate that both back-propagation neural network and Adaboost classifiers based on 18 selected features have their own advantages at the segment classification stage in terms of pedestrian detection performance and computation time, and the track classification procedure can improve the detection performance particularly for partially occluded pedestrians in comparison with the single segment classification procedure.
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