c++ - opencv:对 `cv::cuda::DescriptorMatcher::createBFMatcher(int)' 的 undefined reference

Question

我正在尝试编译 opencv-3.1.0/samples/gpu/surf_keypoint_matcher.cpp 通过:

g++ -I/usr/local/include/opencv -I/usr/local/include/opencv2 -L/usr/local/lib/-g -o 二进制 surf_keypoint_matcher.cpp -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_stitching -lopencv_imgcodecs -lopencv_xfeatures2d

但是我收到了这个错误:

/tmp/ccQW7t3Z.o: In function `main':
/home/luca/Downloads/opencv-3.1.0/samples/gpu/surf_keypoint_matcher.cpp:65: undefined reference to `cv::cuda::DescriptorMatcher::createBFMatcher(int)'
collect2: error: ld returned 1 exit status

为什么？

Answer 1

您的错误信息:

/home/luca/Downloads/opencv-3.1.0/samples/gpu/surf_keypoint_matcher.cpp:65: undefined reference to `cv::cuda::DescriptorMatcher::createBFMatcher(int)'
collect2: error: ld returned 1 exit status

表明您有一个 undefined reference cv::cuda::DescriptorMatcher::createBFMatcher

这位于 cuda 库中，因此您需要包含适当的 header 并链接到以下库，因为 opencv_cudafeatures2d 取决于它们:

• opencv_cudafilters
• opencv_cudawarping
• opencv_features2d
• opencv_cudaarithmn
• opencv_flann
• opencv_核心

对于我正在使用的 opencv 3.1.0 版来说确实如此