错误：“ calcOpticalFlowPyrLK”不是“ cv”的成员-OpenCV 2.4.2

Question

我在OpenCV 2.4.2上遇到此错误。

我正在使用以下代码行：

 cv::calcOpticalFlowPyrLK(prev, next, prev_pts, next_pts, status, error);

并在编译时显示此错误：

testopticalflow.cpp:75:4: error: ‘calcOpticalFlowPyrLK’ is not a member of ‘cv’

如果我使用pkg-config，这就是结果

pkg-config opencv --libs
/usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_ts.so /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so  

抱歉，对于Linux环境，我还是一个新手，所以我不知道哪里出了问题。

Answer 1

对不起，愚蠢的错误。 我忘了将此添加为标题：

#include <opencv2/video/tracking.hpp>