当我尝试运行示例 find_obj.cpp 或任何 OpenCV SURF 程序时，我在执行代码时在命令提示符中收到以下错误.项目构建时没有错误和警告.我使用的是 VS2011 beta、OpenCV 2.4 和 windows7.

错误信息:

OpenCV Error: The function/feature is not implemented < OpenCV was built without SURF support> in unknown function,file ......srcopencvmoduleslegacysrcfeatures2d.cpp,line 77

我尝试使用 Cmake 再次构建 OpenCV 2.4，然后在调试模式下使用 VS2011，然后在 IDE 中添加 lib 路径，但仍然没有结果.

我该如何解决?

    #include <opencv2/objdetect/objdetect.hpp>
    #include <opencv2/features2d/features2d.hpp>
    #include <opencv2/core/core.hpp>
    #include <opencv2/highgui/highgui.hpp>
    #include <opencv2/legacy/legacy.hpp>
    #include <opencv2/legacy/compat.hpp>
    #include <opencv2/flann/flann.hpp>
    #include <opencv2/calib3d/calib3d.hpp>
    #include <opencv2/nonfree/features2d.hpp>
    #include <opencv2/nonfree/nonfree.hpp>

using namespace std;
using namespace cv;
int main()
{
    cv::initModule_nonfree();//THIS LINE IS IMPORTANT   

   IplImage *image1 = cvLoadImage("C:\SURF\1.jpg"); 
    IplImage *image2 = cvLoadImage("C:\SURF\2.jpg");

    CvMemStorage* memoryBlock = cvCreateMemStorage();
    CvSeq* image1KeyPoints;
    CvSeq* image1Descriptors;
    CvSeq* image2KeyPoints;
    CvSeq* image2Descriptors;

    // Only values with a hessian greater than 500 are considered for keypoints
   CvSURFParams params = cvSURFParams(500,1);
   cvExtractSURF(image1,&image1KeyPoints,&image1Descriptors,memoryBlock,params);
   cvExtractSURF(image2,&image2KeyPoints,&image2Descriptors,params);

   return 0;
}