An Efficient and Robust Moving Shadow Removal Algorithm and Its Applications in ITS

Chin-Teng Lin, Chien-Ting Yang, Yu-Wen Shou, Tzu Kuei Shen

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We propose an efficient algorithm for removing shadows of moving vehicles caused by non-uniform distributions of light reflections in the daytime. This paper presents a brand-new and complete structure in feature combination as well as analysis for orientating and labeling moving shadows so as to extract the defined objects in foregrounds more easily in each snapshot of the original files of videos which are acquired in the real traffic situations. Moreover, we make use of Gaussian Mixture Model (GMM) for background removal and detection of moving shadows in our tested images, and define two indices for characterizing non-shadowed regions where one indicates the characteristics of lines and the other index can be characterized by the information in gray scales of images which helps us to build a newly defined set of darkening ratios (modified darkening factors) based on Gaussian models. To prove the effectiveness of our moving shadow algorithm, we carry it out with a practical application of traffic flow detection in ITS (Intelligent Transportation System)-vehicle counting. Our algorithm shows the faster processing speed, 13.84 ms/frame, and can improve the accuracy rate in 4% similar to 10% for our three tested videos in the experimental results of vehicle counting.
Original languageEnglish
Article number945130
JournalEurasip Journal on Advances in Signal Processing
DOIs
StatePublished - 2010

Keywords

  • CAST SHADOWS

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