shadow-removal

I'm using OpenCV2.2 to implement moving objects detection with the method of Background Subtraction. And I use the Gaussian Mixture Model(GMM) method to model the background reference image. I directly get the foreground pixels(or foreground mask) by using the class cv::BackgroundSubtractorMOG provided in OpenCV2.2. It's convenient but the foreground mask returned by cv::BackgroundSubtractorMOG is not as good as I expected. In addition, it seems that cv::BackgroundSubtractorMOG performs poorer than the method of GMM wrote in C language provided in OpenCV1.0. The following is my code in OpenCV2

As title said, any solutions on how to remove the shadow in image via openCV? Thanks and appreciate any helps! For those who are looking for publication along with the source code of described algorithm, you might be interested by this paper: "Single-Image Shadow Detection and Removal using Paired Regions" by Ruiqi Guo, Qieyun Dai and Derek Hoiem. They describe a method which works quite well and may be a very good start to implement your shadow-removing algorithm using OpenCV. I found the source code here , but for posterity and to prevent possibly dead links in the future (I have met many),