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【OpenCV(3)】linux arm aarch 是 opencv 交叉编译与使用
1、直接找github 别人编译好的
测试很多，找到一个可用的。
https://github.com/dog-qiuqiu/libopencv
它用了超级模块！
OpenCV的world模块也称为超级模块（super-module），它结合了用户选择的所有其它模块。在编译OpenCV库时，有需要勾选BUILD_opencv_world模块，其作用是将所有模块的库文件合并成一个大的库文件，方便在链接时候的操作。这样就不用自主编译了。但是已经自主编译了一个，还是记录下吧。
2、自主编译
找了很多github的编译好的文件，都没法用。还是自己编译吧。
opencv的交叉编译工具链在…/opencv3.4.16/platforms/linux 路径下，linux文件夹下是一些.cmake文件，对应不同的移植对象，本人需要在NVIDIA的Xavier部署模型，所以选择aarch64-gnu.toolchain.cmake 工具链。在opencv3.4.16目录下，编写build.sh文件，然后执行
./build.sh --mlu-arch=SD5223C --cpu-arch=aarch64。 具体的buld.sh 这样写这个脚本只有2个地方需要修改：
- 如果你的交叉编译器的地址修改，第53行
TOOLCHAIN_ROOT="/tmp/aarch64--glibc--stable-2020.08-1"。 TARGET_C_COMPILER和TARGET_CXX_COMPILER地址，需要注意。其他地方都很好理解。如果不理解，请在评论区讨论。
TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-g++- 1
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#!/bin/bash ################################################################################ if [ $NEUWARE_HOME ] ;then echo "NEUWARE_HOME: ${NEUWARE_HOME} has been set." else export NEUWARE_HOME="/usr/local/neuware" echo "set NEUWARE_HOME: ${NEUWARE_HOME} by default." fi BUILD_DIR="build" rm -rf "$BUILD_DIR" mkdir -p "$BUILD_DIR" BUILD_MODE="release" MLU_ARCH="" TARGET_CPU_ARCH="x86_64-linux-gnu" TARGET_C_COMPILER="$(which gcc)" TARGET_CXX_COMPILER="$(which g++)" if [ $# != 0 ]; then while [ $# != 0 ]; do case "$1" in --cpu-arch=*) TMP_STRING=$1 TARGET_CPU_ARCH=${TMP_STRING#*=}; TARGET_CPU_ARCH=${TARGET_CPU_ARCH}-linux-gnu; shift ;; --mlu-arch=*) TMP_MLU_ARCH=${1} MLU_ARCH=${TMP_MLU_ARCH#*=} shift ;; -d | --debug) BUILD_MODE="debug" echo "-- Using debug mode." shift ;; -v | --verbose) BUILD_VERBOSE="VERBOSE=1" shift ;; esac done fi ## TOOLCHAIN_ROOT not exist, use default env if [ ! "${TOOLCHAIN_ROOT}" ]; then if [ "$TARGET_CPU_ARCH" == "aarch64-linux-gnu" ]; then if [ "$MLU_ARCH" == "SD5223" ]; then #TOOLCHAIN_ROOT="/tools/gcc/gcc-9/gcc-stable-9.3.0-2020.08-x86_64_aarch4-linux-gnu" TOOLCHAIN_ROOT="/tools/gcc/gcc-9/gcc-stable-9.3.0-2020.08-x86_64_aarch4-linux-gnu" else TOOLCHAIN_ROOT="/tmp/gcc-linaro-6.2.1-2016.11-x86_64_aarch64-linux-gnu" fi echo "Using default TOOLCHAIN_ROOT=${TOOLCHAIN_ROOT}" if [ -f ${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc ]; then TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-g++ else TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-g++ fi fi else echo "Using TOOLCHAIN_ROOT=${TOOLCHAIN_ROOT}" if [ "$TARGET_CPU_ARCH" == "aarch64-linux-gnu" ]; then if [ -f ${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc ]; then TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-g++ else TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-g++ fi fi fi if [[ -f /proc/cpuinfo ]]; then MJOBS=$(grep -c processor /proc/cpuinfo) else MJOBS=4 fi pushd ${BUILD_DIR} cmake -DCMAKE_BUILD_TYPE="${BUILD_MODE}" \ -DTOOLCHAIN_ROOT="${TOOLCHAIN_ROOT}" \ -DTARGET_CPU_ARCH="${TARGET_CPU_ARCH}" \ -DCMAKE_C_COMPILER="${TARGET_C_COMPILER}" \ -DCMAKE_CXX_COMPILER="${TARGET_CXX_COMPILER}" \ -DMLU_ARCH="${MLU_ARCH}" \ -DCMAKE_INSTALL_PREFIX=../aarch_64_install \ -DCMAKE_TOOLCHAIN_FILE=../platforms/linux/aarch64-gnu.toolchain.cmake \ .. make -j$MJOBS ${BUILD_VERBOSE} popd- 1
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这个脚本还是很好用的，如果理解里面的知识点的话！！
make install- 1
编译结束后进入aarch_64_install文件夹，里面生成bin，include，lib，share四个文件夹。
参考
https://zhuanlan.zhihu.com/p/381760569
3使用
可以直接通过指定
export OPENCV_DIR=xxx指定依赖的opencv，默认需要的组织目录(aarch64架构下建议使用该种形式)：|-- ${OPENCV_DIR} | |-- include | | |-- opencv2 | |-- lib | | |-- libxxx- 1
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CMake
# cmake file for samples cmake_minimum_required(VERSION 2.8) project(SAMPLES) set(CMAKE_CXX_STANDARD 11) set(EXECUTABLE_OUTPUT_PATH "${CMAKE_CURRENT_SOURCE_DIR}/bin") set(TOOLCHAIN_ROOT ${TOOLCHAIN_ROOT}) set(TARGET_CPU_ARCH ${TARGET_CPU_ARCH}) if(${TARGET_CPU_ARCH} MATCHES "aarch64-linux-gnu") include_directories(${TOOLCHAIN_ROOT}/aarch64-linux-gnu/include/c++/6.2.1/) include_directories(${TOOLCHAIN_ROOT}/aarch64-linux-gnu/include/c++/6.2.1/aarch64-linux-gnu/) include_directories(${TOOLCHAIN_ROOT}/aarch64-linux-gnu/) endif() ################################################################################ # opencv lib ################################################################################ if(NOT HAVE_OPENCV) if("$ENV{OPENCV_DIR}" STREQUAL "") find_package(OpenCV REQUIRED) set(HAVE_OPENCV true) message("find_package(OpenCV REQUIRED) required.") else() message("find_package(OpenCV REQUIRED) No!") include_directories("$ENV{OPENCV_DIR}/include") link_directories("$ENV{OPENCV_DIR}/lib") set(OpenCV_LIBS opencv_core opencv_imgproc opencv_highgui opencv_imgcodecs) set(HAVE_OPENCV true) endif() endif() if(NOT HAVE_OPENCV) message(FATAL_ERROR "Cannot find opencv which is required.") else() #message(${OpenCV_INCLUDE_DIRS}) message("ok required.") endif() include_directories( ${OpenCV_INCLUDE_DIRS} ) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fPIC -Wall -Werror -pthread") message(STATUS "Project: ${PROJECT_SOURCE_DIR}" ) message(STATUS "Project SOURCE dir: ${SAMPLES_SOURCE_DIR}" ) message(STATUS "Project BINARY dir: ${PROJECT_BINARY_DIR}" ) function(gensample sample_file) set(sample_root_name ${CMAKE_CURRENT_SOURCE_DIR}/${sample_file}.cpp) add_executable(sample_${sample_file} ${sample_root_name} ) target_link_libraries(sample_${sample_file} ${OpenCV_LIBS}) endfunction() ################################################################################ # Build Samples ################################################################################ set(MLU_ARCH) if ("${MLU_ARCH}" MATCHES "SD5223") gensample(OpenCVTest) else() gensample(OpenCVTest) endif()- 1
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#include#include "opencv2/core.hpp" #include "opencv2/imgcodecs.hpp" #include "opencv2/imgproc.hpp" #include "opencv2/highgui/highgui.hpp" int main() { cv::Mat srcImage = cv::imread("1.jpg"); cv::Mat img; cv::cvtColor(srcImage, img, cv::COLOR_BGR2RGB); //cv::imwrite("resize_input.jpg", srcImage); cv::imwrite("resize_input.jpg", img); //cv::Mat img; cv::cvtColor(srcImage, img, cv::COLOR_BGR2RGB); cv::imshow("源图像",srcImage); cv::waitKey(0); return 0; } - 1
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sh脚本
#!/bin/bash ################################################################################ export OPENCV_DIR=/mnt/ef2301-sdk-0.10.0/board/develop_workspace/inference/OpenCV3.0.0-master/arm-obj_rel if [ $NEUWARE_HOME ] ;then echo "NEUWARE_HOME: ${NEUWARE_HOME} has been set." else export NEUWARE_HOME="/usr/local/neuware" echo "set NEUWARE_HOME: ${NEUWARE_HOME} by default." fi BUILD_DIR="build" rm -rf "$BUILD_DIR" mkdir -p "$BUILD_DIR" BUILD_MODE="release" MLU_ARCH="" TARGET_CPU_ARCH="x86_64-linux-gnu" TARGET_C_COMPILER="$(which gcc)" TARGET_CXX_COMPILER="$(which g++)" if [ $# != 0 ]; then while [ $# != 0 ]; do case "$1" in --cpu-arch=*) TMP_STRING=$1 TARGET_CPU_ARCH=${TMP_STRING#*=}; TARGET_CPU_ARCH=${TARGET_CPU_ARCH}-linux-gnu; shift ;; --mlu-arch=*) TMP_MLU_ARCH=${1} MLU_ARCH=${TMP_MLU_ARCH#*=} shift ;; -d | --debug) BUILD_MODE="debug" echo "-- Using debug mode." shift ;; -v | --verbose) BUILD_VERBOSE="VERBOSE=1" shift ;; esac done fi ## TOOLCHAIN_ROOT not exist, use default env if [ ! "${TOOLCHAIN_ROOT}" ]; then if [ "$TARGET_CPU_ARCH" == "aarch64-linux-gnu" ]; then if [ "$MLU_ARCH" == "SD5223" ]; then #TOOLCHAIN_ROOT="/tools/gcc/gcc-9/gcc-stable-9.3.0-2020.08-x86_64_aarch4-linux-gnu" TOOLCHAIN_ROOT="/tools/gcc/gcc-9/gcc-stable-9.3.0-2020.08-x86_64_aarch4-linux-gnu" else TOOLCHAIN_ROOT="/tmp/gcc-linaro-6.2.1-2016.11-x86_64_aarch64-linux-gnu" fi echo "Using default TOOLCHAIN_ROOT=${TOOLCHAIN_ROOT}" if [ -f ${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc ]; then TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-g++ else TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-g++ fi fi else echo "Using TOOLCHAIN_ROOT=${TOOLCHAIN_ROOT}" if [ "$TARGET_CPU_ARCH" == "aarch64-linux-gnu" ]; then if [ -f ${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc ]; then TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/${TARGET_CPU_ARCH}-g++ else TARGET_C_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-gcc TARGET_CXX_COMPILER=${TOOLCHAIN_ROOT}/bin/aarch64-linux-g++ fi fi fi if [[ -f /proc/cpuinfo ]]; then MJOBS=$(grep -c processor /proc/cpuinfo) else MJOBS=4 fi pushd ${BUILD_DIR} cmake -DCMAKE_BUILD_TYPE="${BUILD_MODE}" \ -DTOOLCHAIN_ROOT="${TOOLCHAIN_ROOT}" \ -DTARGET_CPU_ARCH="${TARGET_CPU_ARCH}" \ -DCMAKE_C_COMPILER="${TARGET_C_COMPILER}" \ -DCMAKE_CXX_COMPILER="${TARGET_CXX_COMPILER}" \ -DMLU_ARCH="${MLU_ARCH}" \ .. make -j$MJOBS ${BUILD_VERBOSE} popd- 1
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检查
利用file draw_image检查可执行文件格式是否支持arrch64
draw_image: ELF 64-bit LSB shared object, ARM aarch64, version 1 (GNU/Linux), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=42f4ae7c66a0875bc0d49e4195ff35aa08f15cbe, not stripped- 1
出现如上结果说明可执行文件支持ARM arrch64。
移植ARM端执行
将 aarch_64_install文件夹下的include和lib里的文件分别拷贝到ARM板的/usr/include 和/usr/lib下 然后打开终端执行可执行文件即可。
参考
https://blog.csdn.net/linxizi0622/article/details/128702048
- 如果你的交叉编译器的地址修改，第53行
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- 原文地址：https://blog.csdn.net/djfjkj52/article/details/134288261
