Opencv 3.1求dense optical flow出错

Question

void computeOPF(Mat& img1, Mat& img2, Mat& flow)
{
static Ptr ca = DensePyrLKOpticalFlow::create(Size(7, 7),3,30,false);
cvtColor(img1, img1, CV_RGB2GRAY);
cvtColor(img2, img2, CV_RGB2GRAY);
ca->calc(img1, img2, flow);
imshow("lk", flow);
}
本人根据文档写出上面求浓厚光流的程序，就出现一下这个错误
错误 7 error LNK2019: 无法解析的外部符号 "public: static struct cv::Ptr __cdecl cv::cuda::DensePyrLKOpticalFlow::create(class cv::Size_,int,int,bool)" (?create@DensePyrLKOpticalFlow@cuda@cv@@SA?AU?$Ptr@VDensePyrLKOpticalFlow@cuda@cv@@@3@V?$Size_@H@3@HH_N@Z)，该符号在函数 "void __cdecl computeOPF(class cv::Mat &,class cv::Mat &,class cv::Mat &)" (?computeOPF@@YAXAEAVMat@cv@@00@Z) 中被引用 D:\opencv\test\StereoSfm\StereoSfm\stereosfm.obj StereoSfm
错误 8 error LNK1120: 1 个无法解析的外部命令 D:\opencv\test\StereoSfm\x64\Debug\StereoSfm.exe 1 1 StereoSfm
请问大神们怎么解决 ？