Moving shadow detection by ellipsoidal method in intelligent transportation system
Liu Yong · Journal of Optoelectronics·laser · 2009
A moving shadow detection approach was proposed based on the change of RGB values of shaded pixels.The coordinate systems were defined based on normalized ratio of luminance,and shadow segmentation was treated as a clustering problem in the coordinate systems.Consequently,an ellipsoid was constructed according to scattering feature of shaded pixels.Possible shaded pixels were extracted by the computation whether they lie in above ellipsoid.Meanwhile,the relative values among the normalized luminance ratio of RGB colors were exploited to confirm shadow pixels.Comparison experiments show that the proposed algorithm can detect moving shadow effectively,whose performance is rather higher than that of the statistical nonparametric method(SNP) and deterministic nonmodel-based method(DNM).