fatal error: opencv2/gpu/gpu.hpp: No such file or directory

[VinACE]

(cv) vinsent_research@instance-group-1-3p16:~/dense_flow$ sudo make
Scanning dependencies of target denseFlow_gpu
[ 50%] Building CXX object CMakeFiles/denseFlow_gpu.dir/denseFlow_gpu.cpp.o
/home/vinsent_research/dense_flow/denseFlow_gpu.cpp:4:31: fatal error: opencv2/gpu/gpu.hpp: No such file or directory
compilation terminated.
CMakeFiles/denseFlow_gpu.dir/build.make:62: recipe for target 'CMakeFiles/denseFlow_gpu.dir/denseFlow_gpu.cpp.o' failed
make[2]: *** [CMakeFiles/denseFlow_gpu.dir/denseFlow_gpu.cpp.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/denseFlow_gpu.dir/all' failed
make[1]: *** [CMakeFiles/denseFlow_gpu.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

I have installed all the necessary packages by following
https://github.com/VinACE/Install-TensorFlow-OpenCV-GPU-Ubuntu-17.10
my opencv 3.4.1 install in ubutu 18

sudo cmake -D CMAKE_BUILD_TYPE=RELEASE
-D CMAKE_INSTALL_PREFIX=/usr/local
-D INSTALL_PYTHON_EXAMPLES=ON
-D INSTALL_C_EXAMPLES=OFF
-DPYTHON2_EXECUTABLE=/usr/bin/python2
-D OPENCV_EXTRA_MODULES_PATH=/opencv_contrib-3.4.1/modules
-D PYTHON_EXECUTABLE=/.virtualenvs/cv/bin/python
-D WITH_CUDA=ON
-D CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/g++-5
-D CMAKE_C_COMPILER:FILEPATH=/usr/bin/gcc-5
-D BUILD_EXAMPLES=ON ..

[wanglimin]

This code is for opencv2.4 and ubuntu 14.04.