This repo contains examples of computer vision methods mostly with OpenCV in C++, curated from
- OpenCV examples
https://docs.opencv.org/4.x/d9/df8/tutorial_root.htmland - the book
Visual SLAM: From Theory to Practice, by X. Gao et al.
Work environment: Ubuntu 22.0
- install OpenCV
sudo apt install libopencv-dev
- check installation
dpkg -l libopencv-dev
Install minimal prerequisites
sudo apt update && sudo apt install -y cmake g++ wget unzip libcanberra-gtk-module
Download and unpack sources
wget -O opencv.zip https://github.com/opencv/opencv/archive/4.x.zip
wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.x.zip
unzip opencv.zip
unzip opencv_contrib.zip
Create build directory and switch into it
mkdir -p build && cd build
Configure (with contrib path and non-free modules enabled)
cmake -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules/optflow\;../opencv_contrib/modules/sfm\;../opencv_contrib/modules/plot\;../opencv_contrib/modules/shape\;../opencv_contrib/modules/stereo\;../opencv_contrib/modules/viz\;../opencv_contrib/modules/ximgproc\;../opencv_contrib/modules/xobjdetect\;../opencv_contrib/modules/xfeatures2d\;../opencv_contrib/modules/xphoto -D OPENCV_ENABLE_NONFREE=ON ../opencv
Build
cmake --build . -j 5
Install
sudo make install
Clone Pangolin along with it's submodules
git clone --recursive https://github.com/stevenlovegrove/Pangolin.git
cd Pangolin
Install Homebrew
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
Run these two commands in your terminal to add Homebrew to your PATH:
(echo; echo 'eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"') >> /home/varora/.bashrc
eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
Install recommended packages for Pangolin
./scripts/install_prerequisites.sh -m brew recommended
Install Ninja
sudo apt install ninja-build
Configure and build (with Ninja for faster builds)
cmake -B build -GNinja
cmake --build build
Install Eigen
sudo apt−get install libeigen3−dev