Shadow detection for moving humans using gradient-based background subtraction

authored by: Muhammad Shoaib, Ralf Dragon, Jörn Ostermann
Abstract: Cast shadows cause serious problems in the functionality of vision-based applications, such as video surveillance, traffic monitoring and various other applications. Accurate detection and removal of cast shadows is a challenging task. Common shadow detection techniques normally use color information, which is not a reliable base in every scenario. This paper presents a novel scheme for real time detection of cast shadows using contour like structures of objects, which are obtained by gradient-based background subtraction. The scheme does not use any color information. Two basic rules are followed for shadow detection. The first rule is that shadows do not change the texture of the background. The second rule is a cast shadow lies outside the boundary of an object and has a relatively small common boundary with the object. Experimental results show the performance of the proposed scheme. Objective evaluation shows that the algorithm classifies 90 percent of the pixels of the objects and their shadow correctly.
Organisation(s): Institute of Information Processing
Type: Conference contribution
Pages: 773-776
No. of pages: 4
Publication date: 05.2009
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Software, Signal Processing, Electrical and Electronic Engineering
Electronic version(s): https://doi.org/10.1109/ICASSP.2009.4959698 (Access: Unknown)

BibTeX

@inproceedings{b7913a08f4b945cca29ba4e56cb3ad3d,
title = "Shadow detection for moving humans using gradient-based background subtraction",
abstract = "Cast shadows cause serious problems in the functionality of vision-based applications, such as video surveillance, traffic monitoring and various other applications. Accurate detection and removal of cast shadows is a challenging task. Common shadow detection techniques normally use color information, which is not a reliable base in every scenario. This paper presents a novel scheme for real time detection of cast shadows using contour like structures of objects, which are obtained by gradient-based background subtraction. The scheme does not use any color information. Two basic rules are followed for shadow detection. The first rule is that shadows do not change the texture of the background. The second rule is a cast shadow lies outside the boundary of an object and has a relatively small common boundary with the object. Experimental results show the performance of the proposed scheme. Objective evaluation shows that the algorithm classifies 90 percent of the pixels of the objects and their shadow correctly.",
keywords = "Background subtraction, Shadows, Video surveillance",
author = "Muhammad Shoaib and Ralf Dragon and J{\"o}rn Ostermann",
year = "2009",
month = may,
doi = "10.1109/ICASSP.2009.4959698",
language = "English",
isbn = "9781424423545",
series = "ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings",
publisher = "IEEE",
pages = "773--776",
booktitle = "2009 IEEE International Conference on Acoustics, Speech, and Signal Processing",
note = "2009 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2009 ; Conference date: 19-04-2009 Through 24-04-2009",
}