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Maik Zickermann
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add OpenCV build script
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‎jetson_nano/build_opencv/.gitignore‎

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configure.log
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build.log
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test.log

‎jetson_nano/build_opencv/LICENSE‎

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Copyright 2019 Michael de Gans
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

‎jetson_nano/build_opencv/README.md‎

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# OpenCV build script for Tegra
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https://github.com/mdegans/nano_build_opencv
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This script builds OpenCV from source on Tegra (Nano, NX, AGX, etc.).
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Related thread on Nvidia developer forum
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[here](https://devtalk.nvidia.com/default/topic/1051133/jetson-nano/opencv-build-script/).
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[How it Works](https://wiki.debian.org/QemuUserEmulation)
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## Usage:
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```shell
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./build_opencv.sh
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```
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## Specifying an OpenCV version (git branch)
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```shell
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./build_opencv.sh 4.4.0
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```
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Where `4.4.0` is any version of openCV from 2.2 to 4.4.0
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(any valid OpenCV git branch or tag will also attempt to work, however the very old versions have not been tested to build and may require spript modifications.).
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**JetPack 4.4 NOTE:** the minimum version that will build correctly on JetPack 4.4 GA is 4.4.0. Prior versions of JetPack may need the CUDNN version adjusted (the `-D CUDNN_VERSION='8.0'` line can simply be removed).

‎jetson_nano/build_opencv/build_opencv.sh‎

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#!/usr/bin/env bash
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# 2019 Michael de Gans
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set -e
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# change default constants here:
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readonly PREFIX=/usr/local # install prefix, (can be ~/.local for a user install)
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readonly DEFAULT_VERSION=4.4.0 # controls the default version (gets reset by the first argument)
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readonly CPUS=$(nproc) # controls the number of jobs
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# better board detection. if it has 6 or more cpus, it probably has a ton of ram too
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if [[ $CPUS -gt 5 ]]; then
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# something with a ton of ram
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JOBS=$CPUS
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else
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JOBS=1 # you can set this to 4 if you have a swap file
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# otherwise a Nano will choke towards the end of the build
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fi
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cleanup () {
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# https://stackoverflow.com/questions/226703/how-do-i-prompt-for-yes-no-cancel-input-in-a-linux-shell-script
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while true ; do
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echo "Do you wish to remove temporary build files in /tmp/build_opencv ? "
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if ! [[ "$1" -eq "--test-warning" ]] ; then
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echo "(Doing so may make running tests on the build later impossible)"
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fi
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read -p "Y/N " yn
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case ${yn} in
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[Yy]* ) rm -rf /tmp/build_opencv ; break;;
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[Nn]* ) exit ;;
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* ) echo "Please answer yes or no." ;;
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esac
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done
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}
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setup () {
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cd /tmp
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if [[ -d "build_opencv" ]] ; then
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echo "It appears an existing build exists in /tmp/build_opencv"
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cleanup
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fi
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mkdir build_opencv
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cd build_opencv
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}
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git_source () {
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echo "Getting version '$1' of OpenCV"
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git clone --depth 1 --branch "$1" https://github.com/opencv/opencv.git
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git clone --depth 1 --branch "$1" https://github.com/opencv/opencv_contrib.git
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}
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install_dependencies () {
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# open-cv has a lot of dependencies, but most can be found in the default
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# package repository or should already be installed (eg. CUDA).
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echo "Installing build dependencies."
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sudo apt-get update
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sudo apt-get dist-upgrade -y --autoremove
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sudo apt-get install -y \
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build-essential \
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cmake \
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git \
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gfortran \
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libatlas-base-dev \
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libavcodec-dev \
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libavformat-dev \
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libavresample-dev \
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libcanberra-gtk3-module \
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libdc1394-22-dev \
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libeigen3-dev \
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libglew-dev \
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libgstreamer-plugins-base1.0-dev \
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libgstreamer-plugins-good1.0-dev \
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libgstreamer1.0-dev \
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libgtk-3-dev \
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libjpeg-dev \
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libjpeg8-dev \
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libjpeg-turbo8-dev \
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liblapack-dev \
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liblapacke-dev \
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libopenblas-dev \
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libpng-dev \
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libpostproc-dev \
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libswscale-dev \
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libtbb-dev \
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libtbb2 \
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libtesseract-dev \
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libtiff-dev \
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libv4l-dev \
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libxine2-dev \
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libxvidcore-dev \
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libx264-dev \
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pkg-config \
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python-dev \
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python-numpy \
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python3-dev \
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python3-numpy \
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python3-matplotlib \
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qv4l2 \
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v4l-utils \
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v4l2ucp \
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zlib1g-dev
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}
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configure () {
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local CMAKEFLAGS="
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-D BUILD_EXAMPLES=OFF
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-D BUILD_opencv_python2=ON
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-D BUILD_opencv_python3=ON
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-D CMAKE_BUILD_TYPE=RELEASE
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-D CMAKE_INSTALL_PREFIX=${PREFIX}
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-D CUDA_ARCH_BIN=5.3,6.2,7.2
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-D CUDA_ARCH_PTX=
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-D CUDA_FAST_MATH=ON
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-D CUDNN_VERSION='8.0'
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-D EIGEN_INCLUDE_PATH=/usr/include/eigen3
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-D ENABLE_NEON=ON
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-D OPENCV_DNN_CUDA=ON
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-D OPENCV_ENABLE_NONFREE=ON
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-D OPENCV_EXTRA_MODULES_PATH=/tmp/build_opencv/opencv_contrib/modules
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-D OPENCV_GENERATE_PKGCONFIG=ON
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-D WITH_CUBLAS=ON
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-D WITH_CUDA=ON
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-D WITH_CUDNN=ON
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-D WITH_GSTREAMER=ON
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-D WITH_LIBV4L=ON
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-D WITH_OPENGL=ON"
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if [[ "$1" != "test" ]] ; then
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CMAKEFLAGS="
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${CMAKEFLAGS}
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-D BUILD_PERF_TESTS=OFF
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-D BUILD_TESTS=OFF"
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fi
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echo "cmake flags: ${CMAKEFLAGS}"
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cd opencv
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mkdir build
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cd build
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cmake ${CMAKEFLAGS} .. 2>&1 | tee -a configure.log
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}
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main () {
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local VER=${DEFAULT_VERSION}
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# parse arguments
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if [[ "$#" -gt 0 ]] ; then
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VER="$1" # override the version
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fi
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if [[ "$#" -gt 1 ]] && [[ "$2" == "test" ]] ; then
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DO_TEST=1
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fi
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# prepare for the build:
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setup
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install_dependencies
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git_source ${VER}
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if [[ ${DO_TEST} ]] ; then
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configure test
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else
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configure
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fi
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# start the build
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make -j${JOBS} 2>&1 | tee -a build.log
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if [[ ${DO_TEST} ]] ; then
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make test 2>&1 | tee -a test.log
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fi
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# avoid a sudo make install (and root owned files in ~) if $PREFIX is writable
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if [[ -w ${PREFIX} ]] ; then
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make install 2>&1 | tee -a install.log
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else
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sudo make install 2>&1 | tee -a install.log
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fi
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cleanup --test-warning
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}
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main "$@"

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