OpenCV 2.3.1 installation, VS 2010, MEX
C:OpenCV2.3buildincludeopencv
C:OpenCV2.3buildincludeopencv2
C:OpenCV2.3include

#include <opencv/cv.h>

#include <opencv2/opencv.hpp>

#include "opencv2/core/core_c.h"
#include "opencv2/core/core.hpp"
#include "opencv2/flann/miniflann.hpp"
#include "opencv2/imgproc/imgproc_c.h"
...