OpenCV installation, QT, VS configuration project settings

opencv下载、安装

OpenCV官网下载exe,双击即可解压（其实是个压缩包）

Then install it yourselfVC15的bin路径添加到环境变量（VC2017及之后是VC15版本,之前版本是VC14）

// 两者的区别是：d:代表debug版本,非d则是release版本
opencv_world451.lib
opencv_world451d.lib

VS项目配置

VS设置：
注意：vs设置中,文件路径是右斜杠 \（winHow the system file manager is identified）,But the programming file uses a left slash /
参考视频教程:B站教程

(文件相对路径,以.slnThe project management file is the current directory,.\代表当前目录,..\代表上级目录,..\..\Represents the upper-level directory) （相对路径：相对路径里面的“相对”实际上指的是以工程文件XXX.vcproj为起点进行计算的路径,所以用 . to name the root directory of a relative path,如.\include That is, it refers to a subdirectory of the current project directoryincludelook for header files.）

Basic stuff to install：

• 知识：VC++目录和C/C++的区别:
• VC++ Directories（VC++目录）的变量是一个Windows环境变量,和操作系统----控制面板----高级系统设置----The environment variables added in the environment variables are the same,Paths under this directory are only in VS中有效.
• C/C++The settings in are used to set command line parameters,只针对当前工程.
• VSInside the relative path of the project“相对”实际上指的是以工程文件XXX.vcproj为起点进行计算的路径,所以用 . to name the root directory of a relative path,如.\include That is, it refers to a subdirectory of the current project directoryincludelook for header files.

**0：创建工程模板
目录结构：

• binfile as the running directory of the project,且包含了opencvSome dynamic link libraries, etc.
• include文件夹包含了opencv的include头文件.
• lib文件夹放opencv的静态链接库
  

1：配置输出目录
以slnThe location of the project is used as a reference location,The output directory suffix should be added\右斜杠;


2：调试目录,The same as the output directory.Which directory is placed underdllResource files such as dynamic libraries and images

3：附件包含目录,即opencv的源文件、头文件

4：附加库目录：

5：输入库,其中331d的d代表debug版本

6：为了测试方便,The console can be opened

7：QT头文件路径

Basic run template

#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
using namespace cv;
int main(int argc, char *argv[])
{
    
    Mat image = imread("1.png"); //The image needs to be placeddebug或者release文件夹下,That is, the running directory of the program
    namedWindow("img");
    moveWindow("img", 512, 0);  //图像显示窗口的位置移动
    imshow("img", image);
    waitKey(0);
    destroyAllWindows();
    return 0;
}