And yes, OpenCV is available in these repositories. Ninja will automatically detect number of available processor cores and does not need -j option. The first installation method is the easiest you can imagine because it is by using the Ubuntu repositories. Make can run multiple compilation processes in parallel, -j option means 'run jobs simultaneously'. Install OpenCV and Dlib in Ubuntu 18.04 (for both c++ and python) the right way for production ready applications In this post, we will cover the following: 1.Installing OpenCV 3.4.3 on. Select the desired version and click 'Sources', which will download the zip file. Changes in the configuration like disabling a dependency, modifying build scripts or switching sources to another branch are not handled very well and can result in broken workspace. Download OpenCV: You can download OpenCV from the public Github repository of OpenCV or from their official website from here. If you experience problems with the build process, try to clean or recreate the build directory.

Refer to the OpenCV installation overview and OpenCV configuration options reference tutorials for details and full configuration options reference. I have followed the opencv installation instructions and I am able to make and compile the library, yet after installation, pkgconfig still cant find the library, and when I try to build programs, I get things like missing library errors. Note Configure process can download some files from the internet to satisfy library dependencies, connection failures can cause some of modules or functionalities to be turned off or behave differently. I have been trying to install opencv4.0.1 on ubuntu for a few weeks now.

Install opencv ubuntu