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 o...