我正在尝试构建此代码：https ://github.com/yjxiong/dense_flow/tree/opencv-3.1
我正在使用 Ubuntu 16.04 并安装了 OpenCV 3.4。
在系统上找不到 xfeatures2d.hpp。
我在互联网上查看了许多不同的问题，但找不到解决方案。
错误如下：
/dense_flow/build$ cmake .. && make -j
-- Boost version: 1.65.1
-- Found the following Boost libraries:
-- python
-- Configuring done
-- Generating done
-- Build files have been written to: /home/yyk/ACTION/mmaction/third_party/dense_flow/build
Scanning dependencies of target denseflow
[ 7%] Building CXX object CMakeFiles/denseflow.dir/src/dense_warp_flow_gpu.cpp.o
[ 14%] Building CXX object CMakeFiles/denseflow.dir/src/dense_flow_gpu.cpp.o
/home/yyk/ACTION/mmaction/third_party/dense_flow/src/dense_warp_flow_gpu.cpp:12:10: fatal error: opencv2/xfeatures2d.hpp: No such file or directory
#include "opencv2/xfeatures2d.hpp"
^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
/home/yyk/ACTION/mmaction/third_party/dense_flow/src/dense_flow_gpu.cpp:5:10: fatal error: opencv2/xfeatures2d.hpp: No such file or directory
#include "opencv2/xfeatures2d.hpp"
^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
CMakeFiles/denseflow.dir/build.make:134: recipe for target 'CMakeFiles/denseflow.dir/src/dense_warp_flow_gpu.cpp.o' failed
make[2]: *** [CMakeFiles/denseflow.dir/src/dense_warp_flow_gpu.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CMakeFiles/denseflow.dir/build.make:110: recipe for target 'CMakeFiles/denseflow.dir/src/dense_flow_gpu.cpp.o' failed
make[2]: *** [CMakeFiles/denseflow.dir/src/dense_flow_gpu.cpp.o] Error 1
CMakeFiles/Makefile2:215: recipe for target 'CMakeFiles/denseflow.dir/all' failed
make[1]: *** [CMakeFiles/denseflow.dir/all] Error 2
Makefile:83: recipe for target 'all' faile
任何帮助都很棒！