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Could not find a package configuration file provided by "opencv2"

asked 2016-05-27 06:00:49 -0600

spkulgod gravatar image

updated 2016-05-27 12:16:34 -0600

I was following the Converting between ROS images and OpenCV images (Python) tutorial and i came across the following problem while running catkin_make. I am new to ros and i am still finding my way around it. I have installed opencv and have tried out the solutions suggested in other threads, but none of them seem to work. This is the error i get while executing catkin_make.

  CMake Error at /opt/ros/indigo/share/catkin/cmake/catkinConfig.cmake:83 (find_package):
  Could not find a package configuration file provided by "opencv2" with any
  of the following names:


  Add the installation prefix of "opencv2" to CMAKE_PREFIX_PATH or set
  "opencv2_DIR" to a directory containing one of the above files.  If
  "opencv2" provides a separate development package or SDK, be sure it has
  been installed.

my CMakeLists file has the following content

cmake_minimum_required(VERSION 2.8.3)
find_package(catkin REQUIRED COMPONENTS
target_link_libraries(opencv_test ${OpenCV_LIBRARIES})
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Could you share the CMakeLists?

ROSkinect gravatar imageROSkinect ( 2016-05-27 09:42:36 -0600 )edit

Please add a link to any tutorials you are following and / or pages you are referring to. It's hard to figure out what you are doing otherwise.

gvdhoorn gravatar imagegvdhoorn ( 2016-05-27 14:07:44 -0600 )edit

This is the link for the tutorial

spkulgod gravatar imagespkulgod ( 2016-05-27 21:12:03 -0600 )edit

That page only tells you to update your manifest, which is not CMakeLists.txt, but package.xml.

gvdhoorn gravatar imagegvdhoorn ( 2016-05-28 01:35:26 -0600 )edit

yeah but the vision_opencv page asks me to edit the CMakeLists.txt the link for the isvision_opencv

spkulgod gravatar imagespkulgod ( 2016-05-28 11:59:02 -0600 )edit

Again: that is for C++ only. Python programs/scripts/nodes are never linked against C++ libraries, nor do you setup an include path for them (or at least, not in the way that CMake snippet is doing).

gvdhoorn gravatar imagegvdhoorn ( 2016-05-28 12:31:04 -0600 )edit

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answered 2016-05-27 12:37:38 -0600

gvdhoorn gravatar image
find_package(catkin REQUIRED COMPONENTS

opencv2 is not a package, which is why CMake fails when it tries to find the config file.

Remove it from the catkin components. Just the find_package(OpenCV ..) should be enough.

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i tried doing that and i get a different error as shown below

CMake Error at opencv_test/CMakeLists.txt:121 (target_link_libraries):
  Cannot specify link libraries for target "opencv_test" which is not built
  by this project.

-- Configuring incomplete, errors occurred!
spkulgod gravatar imagespkulgod ( 2016-05-27 14:01:01 -0600 )edit

This is probably because i have added opencv2 as a dependency while creating the package as told in the tutorial. Should i change it to opencv?

spkulgod gravatar imagespkulgod ( 2016-05-27 14:03:06 -0600 )edit

Which makes sense, since you don't have any executable target named opencv_test anywhere in your CMakeLists.txt.

gvdhoorn gravatar imagegvdhoorn ( 2016-05-27 14:04:06 -0600 )edit

Converting between ROS images and OpenCV images (Python)

Is this in Python? If so, then none of this is needed. Python nodes are not compiled, and you have to do completely different things for them. See the catkin docs.

gvdhoorn gravatar imagegvdhoorn ( 2016-05-27 14:06:50 -0600 )edit

thank you, i will try that out and get back.

spkulgod gravatar imagespkulgod ( 2016-05-28 11:59:42 -0600 )edit

Thank you for the help, it seems to be working.

spkulgod gravatar imagespkulgod ( 2016-05-30 02:33:00 -0600 )edit

spkulgod, How can you do that ? Teach me, pls

ToanJunifer gravatar imageToanJunifer ( 2018-09-18 04:08:50 -0600 )edit

I trying to change follow the guide but it's not working. And then i access on catkin docs,then i click on install Cmake file dont know what is was: `catkin_package(CFG_EXTRAS your_macros.cmake your_modules.cmake)

ToanJunifer gravatar imageToanJunifer ( 2018-09-18 04:12:29 -0600 )edit

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Asked: 2016-05-27 06:00:49 -0600

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Last updated: May 27 '16