Dear jiapei,
I am doing research about face expression recognition, based on ur VOSM. I have some problems.
http://www.visionopen.com/resources/computer-vision/statistical-models/ Why could not I download trained data from this page? I got the problem saying "Apologies, but the page you requested could not be found. Perhaps searching will help.".
And I have tried to train data using FRANCK images. But if the number of images exceeds 600, an error about "insufficient memory" will show up. Maybe computer with larger memory will help? I will appreciate if the trained data could be provided.
Besides, I built VOSM successfully in VS2010 WIN7, but it failed when in MAX OS. The problem is weird:

/Users/frank/Desktop/vosm-0.3.2/modules/utils/src/VO_ScanFilesInDir.cpp:119: error: invalid conversion from ‘bool (*)(const std::string&)’ to ‘void*’
/Users/frank/Desktop/vosm-0.3.2/modules/utils/src/VO_ScanFilesInDir.cpp:119: error: initializing argument 2 of ‘boost::filesystem3::path::path(const Source&, typename boost::enable_if<boost::filesystem3::path_traits::is_pathable<typename boost::decay<T>::type>, void>::type*) [with Source = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]’

So do u know anything about building VOSM in MAC OS?
Thank u very much!
Franky