Installation instructions of openCV using version 3.2.0 with Code::Blocks

1. Using openCV 3.2.0
with CodeBlocks
David Hsu

2. Download the installers
• openCV 3.2.0 (opencv-3.2.0-vc14.exe)
http://opencv.org/downloads.html
• tdm-gcc (tdm64-gcc-5.1.0-2.exe)
http://tdm-gcc.tdragon.net/download
• CodeBlocks (codeblocks-16.01-setup.exe)
http://www.codeblocks.org/downloads/26
• CMake (cmake-3.7.1-win64-x64.msi)
https://cmake.org/download/

3. Get openCV
• http://opencv.org/downloads.html
• opencv-3.2.0-vc14.exe

4. Extract opencv320 under C:
• Extract to C:
• Extracting…

5. Create a new folder under
C:opencv
• New a folder “build_codeblocks” under C:opencv

6. Get tdm-gcc
• http://tdm-gcc.tdragon.net/download
• tdm64-gcc-5.1.0-2.exe

7. Install tdm-gcc
• Create a new TDM-GCC installation
• Create a MinGW-w64-based installation
• Next> ….

8. Get CodeBlocks
• http://www.codeblocks.org/downloads/26
• codeblocks-16.01-setup.exe (go without mingw)

9. Open CodeBlocks
• Settings -> Compiler-… :

10. In CodeBlocks
• Select “Toolchain executables”
• Check Compiler’s installation directory : C:TDM-GCC-64

11. If can’t find compiler executable
• Click “Reset defaults”
• Click OK for the Message of “Auto-detected to C:TDM-GCC-64”

12. Get CMake
• https://cmake.org/download/
• cmake-3.7.1-win64-x64.msi or cmake-3.7.1-win32-x86.msi

13. Install CMake
• Next …

14. Open CMake (cmake-gui)
• Browse Source to “C:/opencv/sources”
• Browse Build to “C:/opencv/build_codeblocks”
• Click “Configure”

15. Specify the generator
• Choose the generator : CodeBlocks-MinGW Makefiles
• Check “Use default native compilers”
• Click “Finish”

16. BUILD_opencv_world
• Once configuring done, scroll down and search for
BUILD_opencv_world. Make the option checked.
• Configure again

17. Generate
• Configuring done  Generate  Generating done

18. OpenCV.cbp
• Go to “C:opencvbuild_codeblocks” and open “OpenCV.cbp”

19. Build
• Build the OpenCV project

20. Build
• Build finished without any error (It may take a while)

21. Retarget the build to install
• Build  Select target  install

22. Build again
•

23. Build again
• Build without errors

24. Select opencv and opencv2
• Copy from “C:opencvbuild_codeblocksinstallinclude”
• Paste to “C:TDM-GCC-64x86_64-w64-mingw32include”

25. Select libopencv_world320.dll.a
• Copy from “C:opencvbuild_codeblocksinstallx64mingwlib”
• Paste to “C:TDM-GCC-64x86_64-w64-mingw32lib’’

26. Select all
• Copy from “C:opencvbuild_codeblocksinstallx64mingwbin”
• Paste to “C:TDM-GCC-64bin”

27. Create a new project in CodeBlocks
• File  new  Project…
• Choose “Console application”

28. Project – C++
• Choose “C++”

29. Project – name and save to…
• Name the project
• Determine the directory where the project will be saved to

30. Project – GNU GCC Compiler
• Check the compiler

31. Codes in main.cpp
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main()
{
Mat image1, image2;
image1 = imread("lena.bmp", CV_LOAD_IMAGE_COLOR); // Read the file
if (!image1.data) // Check for invalid input
{
cout << "Could not open or find the image" << std::endl;
return -1;
}
image2 = imread("lena.bmp", CV_LOAD_IMAGE_GRAYSCALE); // Read the file
if (!image2.data) // Check for invalid input
{
cout << "Could not open or find the image" << std::endl;
return -1;
}
cout<<"opencv test"<<endl;
namedWindow("Color Image", WINDOW_AUTOSIZE);// Create a window for display.
imshow("Color Image", image1); // Show our image inside it.
namedWindow("Gray Scale Image", WINDOW_AUTOSIZE);// Create a window for display.
imshow("Gray Scale Image", image2); // Show our image inside it.
waitKey(0); // Wait for a keystroke in the window
destroyAllWindows();
return 0;
}

32. main.cpp

33. Build options
• Right click the project and choose “Build options…”

34. Linker settings
• Linker settings
• Add

35. opencv_world320
• Add library : opencv_world320

36. opencv_world320
• Make sure opencv_world320 has been added to Link libraries

37. lena.bmp
• Put the resource file “lena.bmp” under the same directory of
main.cpp

38. Build and run
• Build and run the cvTest project

39. Image show

40. • Congrats and enjoy
programming with openCV