vscode在配置opencv后终端报错“fatal error: opencv2\calib3d.hpp: No such file or directory”，大家能不能看看怎么解决啊

按照网上的一篇文章配置opencv的环境，文章链接是https://my.oschina.net/u/4313733/blog/4585043
opencv都编译了（但是编译过程有报一些warning，但好像还是可以进行）
于是到了VScode配置的部分，按教程是配置launch,tasks,c_cpp_properties三个json文件，可能就是其中我的路径写的不对，但我也不知道怎么改，希望大神们可以帮我看看
这是我写的代码：

#include <opencv2\calib3d.hpp>
#include <opencv2\highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main()
{
    Mat img=imread("man.jpg");
    imshow("image",img);
    waitKey();
    return 0;
}

但是编译似乎不成功：

提示我：fatal error: opencv2\calib3d.hpp: No such file or directory
而我的三个json文件代码如下：
launch.json:

{
                "name": "opencv4.5.4 debuge",
                "type": "cppdbg",
                "request": "launch",
                "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
                "args": [],
                "stopAtEntry": true,
                "cwd": "${workspaceFolder}",
                "environment": [],
                "externalConsole": true,
                "MIMode": "gdb",
                "miDebuggerPath": "D:\\VSCode\\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\\mingw64\\bin\\gdb.exe",
                "setupCommands": [
                    {
                        "description": "为 gdb 启用整齐打印",
                        "text": "-enable-pretty-printing",
                        "ignoreFailures": false
                    }
                ],
                "preLaunchTask": "opencv4.5.4 compile task"
            },

tasks.json:

{
            "type": "shell",
            "label": "opencv4.5.4 compile task",
            "command": "D:\\VSCode\\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
            "args": [
                "-g",
                "${file}",
                "-o",
                "${fileDirname}\\${fileBasenameNoExtension}.exe",
                "D:\\opencv\\build\\x64\\mingw\\bin\\libopencv_world454.dll",
                "-I",
                "D:\\opencv\\build\\include",
                "-I",
                "D:\\opencv\\build\\include\\opencv2",
                "-I",
                "",
            ],
            "options": {
                "cwd": "D:\\VSCode\\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\\mingw64\\bin"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }

c_cpp_properties.json:

{
    "configurations": [
          {
    "name": "MinGW64",
    "intelliSenseMode": "gcc-x64",
    "compilerPath": "D:\\VSCode\\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
    "includePath": [
    "${workspaceFolder}",
    "D:\\opencv\\build\\include",
    "D:\\opencv\\build\\include\\opencv2"
              ],
    "cppStandard": "c++17"
          }
      ],
    "version": 4
   }

其中D:\VSCode\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\mingw64\bin\g++.exe是我g++编译器的位置，位置应该是没有问题的，我写一般的c++程序都没有问题
而我在用Cmake-gui的时候源文件路径和MakeFiles保存路径选择如图：

而路径"D:\opencv\build\include\opencv2"下可以找到需要的c++头文件：

所以不知道json文件要怎么改
求大神指点

opencv安装了吗？
这个报错的hpp文件找一下，有没有，在哪个目录

tasks.json文件里"D:\opencv\build\x64\mingw\bin\libopencv_world454.dll"的上一行少了一个"-I"。