Normally you won't get errors while compiling, so you don't need to debug. If you need to customize OpenCV, then you have to recompile it. Using the Python library (with pip install.) will get you a precompiled library too. This is valid for OpenCV library, no matter if you built it yourself or downloaded it.
#OPENCV CMAKE PDF#
Just make sure that the include folders and the library ( opencv_worldXXX.lib) are added to your Visual Studio project, and the OpenCV DLL file ( opencv_worldXXX.dll) is accessible by the executable. email protected C Tutorial PDF Version Quick Guide Resources Job Search Discussion C is a simple, modern, general-purpose, object-oriented programming language developed by Microsoft within its This being the case you will use the following command to configure and compile: 4 and OpenMPI 1 MPI Backend.
#OPENCV CMAKE WINDOWS#
Unfortunately I agree that external libraries in Visual Studio and compiling big projects is a real PITA.Äownloading the OpenCV library for windows from the site will give you a library that's ready to be employed. The compilation is handled by the Visual Studio compiler called cl. And create a directory inside of 'build' and name it 'mingw' incase you want to build using a different compiler later on. Create a directory in the opencv folder and name it 'build'. video codecs) and the available hardware in your machine (e.g. Open the CMake GUI and select C:\opencv as the source directory (CMakeLists.txt should be present in C:\opencv). It generates the project files ( SLN for Visual Studio or Makefile for make/gcc) according to your needs (you can select the modules you need), the installed libraries (e.g.
#OPENCV CMAKE HOW TO#
I want to be able to debug the errors from the compiling phase and for that I need to know why the special treatment for the c++ library compared to the python one? Why do I need to compile opencv and why does it need to be done with cmake? Does pip install opencv-contrib-python also compile opencv behind the scene? Is that systematic for all libraries? I followed this tutorial but it teaches how to install opencv per project, so is that it? Does compiling allow you to add opencv globally?ĬMake is not for compiling OpenCV, it's just a configuration utility. Python opencv is just a bunch of shell commands away, but the c++ library is a nightmare especially that it involves working with visual studio which, on its own, is pain to get to work properly.
At first, I just wanted to follow the instructions to install opencv on windows and move on since I thought the task itself is pretty straightforward, but then I got hit with some serious looking error messages when I tried to "compile" c++ opencv (step 6.1 in this tutorial). I just got an internship and I was tasked to generate dll files from c++ class and function definitions that call to the opencv library.