CODEWITHSUNDEEP
opencvcmake
Jav_Rock
Jav_Rock

Reputation: 22245

Could not find module FindOpenCV.cmake ( Error in configuration process)

I wrote a CMakeLists.txt for a project in C++, which uses OpenCV libraries. When I try to create the project using cmake, I get the next configuration problem:

CMake Error at CMakeLists.txt:15 (find_package):
  Could not find module FindOpenCV.cmake or a configuration file for package
  OpenCV.

  Adjust CMAKE_MODULE_PATH to find FindOpenCV.cmake or set OpenCV_DIR to the
  directory containing a CMake configuration file for OpenCV.  The file will
  have one of the following names:

    OpenCVConfig.cmake
    opencv-config.cmake

The fact is that I have an environment variable for the path which I use in Visual Studio with no problems. If I don't include OpenCV, then I can configure and generate with no problem, but I need to solve the problem. I don't understand why cmake cannot find the OpenCV path or how to fix it.

I also used the recommendations mentioned in this link: FindOpenCV.cmake

Does anybody had this problem too?

Upvotes: 85

Views: 200570

Answers (14)

user6630590
user6630590

Reputation: 211

find / -name "OpenCVConfig.cmake"

export OpenCV_DIR=/path/found/above

Upvotes: 21

gaoxincun
gaoxincun

Reputation: 241

  1. apt-get install libopencv-dev
  2. export OpenCV_DIR=/usr/share/OpenCV
  3. the header of cpp file should contain:
#include <opencv2/opencv.hpp>
#include "opencv2/highgui/highgui.hpp"

#include <cstdio>
#include <iostream>

not original cv.h

Upvotes: 24

Drioueche Mohammed
Drioueche Mohammed

Reputation: 560

For me (on Ubuntu), I just run:

sudo apt-get install libopencv-dev

Upvotes: 2

PRStark
PRStark

Reputation: 1260

When you install the libraries in the c drive (windows). the CMakeLists.txt shoud be looking like below:

cmake_minimum_required(VERSION 3.0.0)
project(test_opencv VERSION 0.1.0)

include(CTest)
enable_testing()

find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(test_opencv main.cpp)

target_link_libraries(test_opencv ${OPENCV_LIBS})

set(CPACK_PROJECT_NAME ${PROJECT_NAME})
set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
include(CPack)

finding the package and include directories

when building the project in VS code. Run the visual studio code with admin rights as the OpenCV is installed inside C drive.

Upvotes: -2

alanxz
alanxz

Reputation: 2026

The error you're seeing is that CMake cannot find a FindOpenCV.cmake file, because cmake doesn't include one out of the box. Therefore you need to find one and put it where cmake can find it:

You can find a good start here. If you're feeling adventurous you can also write your own.

Then add it somewhere in your project and adjust CMAKE_MODULE_PATH so that cmake can find it.

e.g., if you have

CMakeLists.txt
cmake-modules/FindOpenCV.cmake

Then you should do a 

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake-modules)

In your CMakeLists.txt file before you do a find_package(OpenCV)

Upvotes: 42

Albert Yun
Albert Yun

Reputation: 11

I had the same error, I use windows. I add "C:\opencv\build" (opencv folder) to path at the control pannel. So, That's Ok!!

Upvotes: 1

YuZ
YuZ

Reputation: 445

I faced the same error. In my case this "OpenCVConfig.cmake" file is located in /usr/local/share/OpenCV. In CMakeLists.txt add the line

set(OpenCV_DIR /usr/local/share/OpenCV)

as suggested by the error message.

Upvotes: 6

Roy
Roy

Reputation: 127

I am using Windows and get the same error message. I find another problem which is relevant. I defined OpenCV_DIR in my path at the end of the line. However when I typed "path" in the command line, my OpenCV_DIR was not shown. I found because Windows probably has a limit on how long the path can be, it cut my OpenCV_DIR to be only part of what I defined. So I removed some other part of the path, now it works.

Upvotes: 1

penner
penner

Reputation: 2737

I had this exact same problem. I fixed it by adding the following line to my FindOpenCV.cmake file. Put it anywhere at the top before the rest of the code.

set (OpenCV_DIR /home/cmake/opencv/compiled) #change the path to match your complied directory of opencv

Basically you are telling FindOpenCV.cmake where to find opencv files assuming the other compilation can find the FindOpenCV.cmake

Upvotes: 17

user4728427
user4728427

Reputation: 31

if you are on windows, you can add opencv path to OpenCV_DIR yourself. (OpenCV_DIR is in the red region)

the path is like "D:/opencv244/build".

you can find file "OpenCVConfig.cmake" under the path.

Upvotes: 3

feelfree
feelfree

Reputation: 11753

Another possibility is to denote where you can find OpenCV_DIR in the CMakeLists.txt file. For example, the following cmake scripts work for me:

cmake_minimum_required(VERSION 2.8)

project(performance_test)

set(OpenCV_STATIC ON)
set(OpenCV_CUDA OFF)
set(OpenCV_DIR "${CMAKE_SOURCE_DIR}/../install")

find_package(OpenCV REQUIRED)

include_directories(${OpenCV_INCLUDE_DIRS})

link_directories(${OpenCV_LIB_DIR})

file(GLOB my_source_files ./src/*)

add_executable( performance_test ${my_source_files})

target_link_libraries(performance_test ${OpenCV_LIBS})

Just to remind that you should set OpenCV_STATIC and OpenCV_CUDA as well before you invoke OpenCVConfig.cmake. In my case the built library is static library that does not use CUDA.

Upvotes: 3

aguadopd
aguadopd

Reputation: 581

Followed @hugh-pearse 's and @leszek-hanusz 's answers, with a little tweak. I had installed opencv from ubuntu 12.10 repository (libopencv-)* and had the same problem. Couldn't solve it with export OpenCV_DIR=/usr/share/OpenCV/ (since my OpenCVConfig.cmake whas there). It was solved when I also changed some lines on the OpenCVConfig.cmake file:

# ======================================================
# Include directories to add to the user project:
# ======================================================

# Provide the include directories to the caller

#SET(OpenCV_INCLUDE_DIRS "${OpenCV_INSTALL_PATH}/include/opencv;${OpenCV_INSTALL_PATH}/include")

SET(OpenCV_INCLUDE_DIRS "/usr/include/opencv;/usr/include/opencv2")
INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})

# ======================================================
# Link directories to add to the user project:
# ======================================================

# Provide the libs directory anyway, it may be needed in some cases.

#SET(OpenCV_LIB_DIR "${OpenCV_INSTALL_PATH}/lib")

SET(OpenCV_LIB_DIR "/usr/lib")

LINK_DIRECTORIES(${OpenCV_LIB_DIR})

And that worked on my Ubuntu 12.10. Remember to add the target_link_libraries(yourprojectname ${OpenCV_LIBS}) in your CMakeLists.txt.

Upvotes: -1

Hugh Pearse
Hugh Pearse

Reputation: 729

On my Fedora machine, when I typed "make" I got an error saying it could not find "cv.h". I fixed this by modifying my "OpenCVConfig.cmake" file.

Before:

SET(OpenCV_INCLUDE_DIRS "${OpenCV_INSTALL_PATH}/include/opencv;${OpenCV_INSTALL_PATH}/include")

SET(OpenCV_LIB_DIR "${OpenCV_INSTALL_PATH}/lib64")

After:

SET(OpenCV_INCLUDE_DIRS "/usr/include/opencv;/usr/include/opencv2")

SET(OpenCV_LIB_DIR "/usr/lib64")

Upvotes: 1

leszek.hanusz
leszek.hanusz

Reputation: 5317

If you are on Linux, you just need to fill the OpenCV_DIR variable with the path of opencv (containing the OpenCVConfig.cmake file)

export OpenCV_DIR=<path_of_opencv>

Upvotes: 31

Related Questions