【树莓派4B测评】+搭建OPENCV环境

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【树莓派4B测评】+搭建OPENCV环境 [复制链接]

OpenCV是一个基于BSD许可（开源）发行的跨平台计算机视觉和机器学习软件库，可以运行在Linux、Windows、Android和Mac OS操作系统上。它轻量级而且高效——由一系列 C 函数和少量 C++ 类构成，同时提供了Python、Ruby、MATLAB等语言的接口，实现了图像处理和计算机视觉方面的很多通用算法。

今天在树莓派上搭建OPENCV环境：

1.安装numpy

sudo pip3 instal

2. 安装OpenCV所需的依赖

sudo apt-get install build-essential git cmake pkg-config -y
sudo apt-get install libjpeg8-dev -y
sudo apt-get install libtiff5-dev -y
sudo apt-get install libjasper-dev -y
sudo apt-get install libpng12-dev -y

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev -y

sudo apt-get install libgtk2.0-dev -y
sudo apt-get install libatlas-base-dev gfortran -y

3.下载OpenCV

可以github上下载，也可以下载压缩包；

本次安装的OpenCV版本为OpenCV 4.4.0，官方链接地址

需要下载包括OpenCV与OpenCV_Contrib两个仓库

OpenCV_4.4.0仓库：Github地址

4.配置cmake；Cmake是一款跨平台的编译工具，经过配置，可输出适配于树莓派平台的Makefile

在opencv-4.4.0目录下新建一个build文件夹

然后进入文件夹

然后camke

cd/opencv-4.4.0
mkdir build
cd build
cmake .

5.没有出错，直接make

注意：make编译时间比较长，一般编译时间在5小时左右。

6.安装

sudo make insall

7.测试安装；

首先进入源码的示例文件夹中：opencv-4.4.0/samples/cpp/example_cmake

然后cmake 和make

pi@raspberrypi:~/Public/opencv-4.4.0/samples/cpp/example_cmake $ sudo cmake .
-- The C compiler identification is GNU 8.3.0
-- The CXX compiler identification is GNU 8.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found OpenCV: /usr/local (found version "4.4.0") 
-- OpenCV library status:
--     config: /usr/local/lib/cmake/opencv4
--     version: 4.4.0
--     libraries: opencv_calib3d;opencv_core;opencv_dnn;opencv_features2d;opencv_flann;opencv_gapi;opencv_highgui;opencv_imgcodecs;opencv_imgproc;opencv_ml;opencv_objdetect;opencv_photo;opencv_stitching;opencv_video;opencv_videoio
--     include path: /usr/local/include/opencv4
-- Configuring done
-- Generating done
-- Build files have been written to: /home/pi/Public/opencv-4.4.0/samples/cpp/example_cmake
pi@raspberrypi:~/Public/opencv-4.4.0/samples/cpp/example_cmake $ sudo make
Scanning dependencies of target opencv_example
[ 50%] Building CXX object CMakeFiles/opencv_example.dir/example.cpp.o
[100%] Linking CXX executable opencv_example
[100%] Built target opencv_example
pi@raspberrypi:~/Public/opencv-4.4.0/samples/cpp/example_cmake $ sudo ./opencv_example

最后执行后弹出摄像头的界面，说明安装没有问题，如下图：