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Hi there everybody,

I am currently trying to build a package on my Jetson TK1. The package already works on my laptop. Everything works up to the linking stage of the catkin_make. The errors look like : Linking CXX executable /home/ubuntu/catkin_ws/devel/lib/turtlebot_/face_follower face_follower.cpp(.text+0x2fc): undefined reference to 'cv::CascadeClassifier::load(cv::String const&)'

For reference, here's my CMakeLists.txt:

cmake_minimum_required(VERSION 2.8.3)
set(CMAKE_CXX_FLAGS "-std=c++11")
# PROJECT NAME 
project(turtlebot_)

CATKIN PREFIX FOR LIBFREENECT AND OPENCV DIRECTORIES


set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} /usr/local/lib)
set(OpenCV_DIR /usr/share/OpenCV)


ENABLE THREADING AND OPENGL (FOR LATER USE (EX: DISPLAY WITHOUT IMSHOW()))


set(THREADS_USE_PTHREADS_WIN32 true)
find_package(Threads)
find_package(OpenGL)
find_package(GLUT)


ROS RELATED PACKAGES


find_package(catkin REQUIRED COMPONENTS
  cv_bridge
  geometry_msgs
  image_transport
  kobuki_msgs
  nodelet
  pluginlib
  roscpp
  rospy
  rviz
  sensor_msgs
  std_msgs
  tf
  urdf
  xacro
  yocs_controllers
  OpenCV
  message_filters
)


if(CMAKE_VERSION VERSION_LESS "2.8.11")


Add OpenCV headers location to your include paths


include_directories(${OpenCV_INCLUDE_DIRS})
endif()


NON-ROS RELATED PACKAGES


find_package(libfreenect REQUIRED)


REQUIRED TO USE ROS.H


catkin_package()
include_directories(
  include ${catkin_INCLUDE_DIRS} ${freenect_INCLUDE_DIRS})


LIBFREENECT/THREADING/OPENGL DIRECTORIES (SEE EXAMPLES IN LIBFREENECT/EXAMPLES/CMAKELISTS.TXT)


include_directories("/usr/include/libusb-1.0/")
include_directories(../wrappers/c_sync/)
include_directories(${THREADS_PTHREADS_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} ${GLUT_INCLUDE_DIR})


ADDING NODES AND LINKING REQUIRED LIBRARIES


add_executable(face_follower src/face_follower.cpp)
target_link_libraries(face_follower ${OpenCV_LIBS} ${catkin_LIBRARIES} freenect freenect_sync ${CMAKE_THREAD_LIBS_INIT} ${MATH_LIB})


LIKE ALWAYS


add_dependencies(face_follower face_follower_generate_messages_cpp)

I looked into /usr/local/lib and it seems that the OpenCV files are located inside a folder named arm-linux-gnueabihf. I copied them ouside of that folder with their pkgconfig file too but it didn't solve the problem.

Any thoughts?

Originally posted by ferasb on ROS Answers with karma: 16 on 2018-01-06

Post score: 0

1 Answers1

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I managed to solve my problem. I had mistakenly installed OpenCV by myself but since ROS Indigo already has it, some problems were ocurring. I had another error about libfreenect.so.0.6 and I solved it by writting in my terminal (or .bashrc for that matter) the following line: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH=/usr/local/lib.

Now, the thing is that regular OpenCV, or at least the one that comes with Indigo, isn't using GPU acceleration. Face detection is atrociously slow. Will have to find a solution to that...

Originally posted by ferasb with karma: 16 on 2018-01-06

This answer was ACCEPTED on the original site

Post score: 0