Abstract
Pedestrian detection is an important issue in the field of intelligent transportation systems. As a pedestrian is not an apparent object at nighttime, it brings about critical difficulties in effectively detecting a pedestrian for a driving assistant vision system. While using an infrared projector to enhance the illumination contrast, objects in a nighttime environment might reflect the infrared projected by the emitted spotlight. In some cases, however, the clothes on a pedestrian might absorb most of the infrared, thus causing the pedestrian to be partially invisible. To deal with this problem, a nighttime part-based pedestrian detection method is proposed. It divides a pedestrian into parts for a moving vehicle with a camera and a near-infrared lighting projector. Due to a high computation load, selecting effective parts becomes imperative. By analyzing the spatial relationship between every pair of parts, the confidence of the detected parts can be enhanced even when some parts are occluded. At the last stage of this system, the pedestrian detection result is refined by a block-based segmentation method. The system is verified by experiments, and the appealing results are demonstrated.
Original language | English |
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Article number | 7039272 |
Pages (from-to) | 1929-1940 |
Number of pages | 12 |
Journal | IEEE Transactions on Intelligent Transportation Systems |
Volume | 16 |
Issue number | 4 |
DOIs | |
State | Published - 01 08 2015 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2000-2011 IEEE.
Keywords
- Geometric information
- histogram of oriented gradient (HOG)
- near infrared (NIR)
- nighttime
- part based
- pedestrian detection
- spatial relationship