Tutorial: Create OpenCV Project

Prepare Project Workspace

Create the lecture workspace as C:\Users\yourID\source\repos\DLIP

• e.g. C:\Users\ykkim\source\repos\DLIP

Then, create sub-directories as :

• C:\Users\yourID\source\repos\DLIP\Tutorial

• C:\Users\yourID\source\repos\DLIP\Include

Save Property Sheet

Copy or move the OpenCV setup property sheets you have created in the Include folder.

• C:\Users\yourID\source\repos\DLIP\Include

Property Sheets

• opencv-4.9.0_debug_x64.props

• opencv-4.9.0_release_x64.props

If you don't have property sheets, then follow the instruction:

OpenCV Install and Setup

Create a New Project in VS

Create a new C++ project in Visual Studio Community

• 새 프로젝트 만들기 > 빈 프로젝트(C++)

Project Name and Location

• Project Name: DLIP_OpenCV_Simple_Demo

• Project Folder: ~\DLIP\Tutorial\

Setup of Project Property

Include the already created OpenCV property sheets

(Debug x64)

• VS 메뉴바: 보기>다른 창>속성 관리자 선택

• 속성 관리자 탭: 프로젝트명 > Debugx64 RightClick.

• 기존 속성 시트 추가 선택 후 저장된 " opencv-4.9.0_debug_x64.props " 추가

  • It should be located in "~\DLIP\Include\"

(Release x64)

• 속성 관리자 탭: 프로젝트명 > Releasex64 RightClick.

• 기존 속성 시트 추가 선택 후 저장된 " opencv-4.9.0_release_x64.props " 추가

Create Demo Program

Create a new C+ source file

• File Name: DLIP_OpenCV_Simple_Demo.cpp

• 솔루션탐색기 탭: [프로젝트] > 소스 파일 > 추가 > 새항목 > C++파일(cpp) 선택

구성 관리자를 Debug x64로 설정

Run the following demo program. You can run the program by pressing (CTRL+F5)

Demo 1: Image File Read

• 이미지 파일 다운로드: Click here

이미지 파일과 소스코드가 동일 폴더에 있어야 함!!

#include <opencv.hpp>
#include <iostream>

using namespace cv;
using namespace std;

//* @function main
int main()
{
Mat src;

src = imread("testImage.jpg", 1);/// Load an image

if (src.empty())/// Load image check
{
cout << "File Read Failed : src is empty" << endl;
waitKey(0);
}

/// Create a window to display results
namedWindow("DemoWIndow", WINDOW_AUTOSIZE); //WINDOW_AUTOSIZE(1) :Fixed Window, 0: Unfixed window

if (!src.empty())imshow("DemoWIndow", src); // Show image

waitKey(0);//Pause the program
return 0;
}

Expected Output

---

Demo 2: Video Cam capture

#include "opencv.hpp"
#include <iostream>

using namespace cv;
using namespace std;

int main(int argc, char* argv[])
{
    VideoCapture cap(0); // open the video camera no. 0

    if (!cap.isOpened())  // if not success, exit program
    {
        cout << "Cannot open the video cam" << endl;
        return -1;
    }
   namedWindow("MyVideo",WINDOW_AUTOSIZE); //create a window called "MyVideo"

    while (1)
    {
        Mat frame;
        bool bSuccess = cap.read(frame); // read a new frame from video
         if (!bSuccess) //if not success, break loop
        {
             cout << "Cannot read a frame from video stream" << endl;
             break;
        }
        imshow("MyVideo", frame); //show the frame in "MyVideo" window

        if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
       {
            cout << "esc key is pressed by user" << endl;
            break; 
       }
    }
    return 0;
}

Expected Output