<div id="readability-page-1" class="page"><div>
<p>4분할로 웹캠 또는 동영상을 보여주는 OpenCV C++ 예제 코드입니다.</p>



<p>2021. 12. 4 – 최초작성</p>







<p>초기화면 또는 0을 누른 경우에는 4개의 영상을 4분할로 보여주며 1 ~ 4 사이 숫자 누르면 영상 1개씩 전체화면으로 보여줍니다.</p>



<p>테스트에 사용한 영상을 캡처한 결과입니다.&nbsp; 요청 있을시 이미지를 삭제하도록 하겠습니다.</p>



<figure><img data-lazy-fallback="1" data-attachment-id="6210" data-permalink="https://webnautes.blog/6209/%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c/" data-orig-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?fit=1280%2C790&amp;ssl=1" data-orig-size="1280,790" data-comments-opened="1" data-image-meta="{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}" data-image-title="다운로드" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?fit=300%2C185&amp;ssl=1" data-large-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?fit=1024%2C632&amp;ssl=1" decoding="async" fetchpriority="high" width="1024" height="632" src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C.png?resize=1024%2C632&amp;ssl=1" alt="" sizes="(max-width: 1024px) 100vw, 1024px" data-recalc-dims="1" data-old-src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?resize=1024%2C632&amp;is-pending-load=1#038;ssl=1" data-lazy-srcset="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?resize=1024%2C632&amp;ssl=1 1024w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?resize=300%2C185&amp;ssl=1 300w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?resize=768%2C474&amp;ssl=1 768w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?resize=1200%2C741&amp;ssl=1 1200w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드.png?w=1280&amp;ssl=1 1280w"></figure>



<figure><img data-lazy-fallback="1" data-attachment-id="6212" data-permalink="https://webnautes.blog/6209/%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-1/" data-orig-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?fit=1280%2C790&amp;ssl=1" data-orig-size="1280,790" data-comments-opened="1" data-image-meta="{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}" data-image-title="다운로드-1" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?fit=300%2C185&amp;ssl=1" data-large-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?fit=1024%2C632&amp;ssl=1" decoding="async" width="1024" height="632" src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C-1.png?resize=1024%2C632&amp;ssl=1" alt="" sizes="(max-width: 1024px) 100vw, 1024px" data-recalc-dims="1" data-old-src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?resize=1024%2C632&amp;is-pending-load=1#038;ssl=1" data-lazy-srcset="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?resize=1024%2C632&amp;ssl=1 1024w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?resize=300%2C185&amp;ssl=1 300w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?resize=768%2C474&amp;ssl=1 768w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?resize=1200%2C741&amp;ssl=1 1200w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-1.png?w=1280&amp;ssl=1 1280w"></figure>



<figure><img data-lazy-fallback="1" data-attachment-id="6213" data-permalink="https://webnautes.blog/6209/%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-2/" data-orig-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?fit=1280%2C790&amp;ssl=1" data-orig-size="1280,790" data-comments-opened="1" data-image-meta="{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}" data-image-title="다운로드-2" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?fit=300%2C185&amp;ssl=1" data-large-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?fit=1024%2C632&amp;ssl=1" decoding="async" width="1024" height="632" src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C-2.png?resize=1024%2C632&amp;ssl=1" alt="" sizes="(max-width: 1024px) 100vw, 1024px" data-recalc-dims="1" data-old-src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?resize=1024%2C632&amp;is-pending-load=1#038;ssl=1" data-lazy-srcset="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?resize=1024%2C632&amp;ssl=1 1024w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?resize=300%2C185&amp;ssl=1 300w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?resize=768%2C474&amp;ssl=1 768w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?resize=1200%2C741&amp;ssl=1 1200w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-2.png?w=1280&amp;ssl=1 1280w"></figure>



<figure><img data-lazy-fallback="1" data-attachment-id="6214" data-permalink="https://webnautes.blog/6209/%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-3/" data-orig-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?fit=1280%2C790&amp;ssl=1" data-orig-size="1280,790" data-comments-opened="1" data-image-meta="{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}" data-image-title="다운로드-3" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?fit=300%2C185&amp;ssl=1" data-large-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?fit=1024%2C632&amp;ssl=1" decoding="async" loading="lazy" width="1024" height="632" src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C-3.png?resize=1024%2C632&amp;ssl=1" alt="" sizes="(max-width: 1024px) 100vw, 1024px" data-recalc-dims="1" data-old-src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?resize=1024%2C632&amp;is-pending-load=1#038;ssl=1" data-lazy-srcset="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?resize=1024%2C632&amp;ssl=1 1024w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?resize=300%2C185&amp;ssl=1 300w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?resize=768%2C474&amp;ssl=1 768w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?resize=1200%2C741&amp;ssl=1 1200w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-3.png?w=1280&amp;ssl=1 1280w"></figure>



<figure><img data-lazy-fallback="1" data-attachment-id="6215" data-permalink="https://webnautes.blog/6209/%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-4/" data-orig-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?fit=1280%2C790&amp;ssl=1" data-orig-size="1280,790" data-comments-opened="1" data-image-meta="{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}" data-image-title="다운로드-4" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?fit=300%2C185&amp;ssl=1" data-large-file="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?fit=1024%2C632&amp;ssl=1" decoding="async" loading="lazy" width="1024" height="632" src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C-4.png?resize=1024%2C632&amp;ssl=1" alt="" sizes="(max-width: 1024px) 100vw, 1024px" data-recalc-dims="1" data-old-src="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?resize=1024%2C632&amp;is-pending-load=1#038;ssl=1" data-lazy-srcset="https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?resize=1024%2C632&amp;ssl=1 1024w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?resize=300%2C185&amp;ssl=1 300w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?resize=768%2C474&amp;ssl=1 768w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?resize=1200%2C741&amp;ssl=1 1200w, https://i0.wp.com/webnautes.blog/wp-content/uploads/2023/09/다운로드-4.png?w=1280&amp;ssl=1 1280w"></figure>







<p>전체 소스 코드입니다.</p>



<pre><code>#include "opencv2/opencv.hpp"
#include "iostream"

using namespace std;
using namespace cv;

int main() 
{
    VideoCapture camera1("1.mp4");

    if (!camera1.isOpened()) 
    {
        cout &lt;&lt; "ERROR: Could not open camera1" &lt;&lt; endl;
        exit(1);
    }

    VideoCapture camera2("2.mp4");

    if (!camera2.isOpened()) 
    {
        cout &lt;&lt; "ERROR: Could not open camera2" &lt;&lt; endl;
        exit(1);
    }

    VideoCapture camera3("3.mp4");

    if (!camera3.isOpened()) 
    {
        cout &lt;&lt; "ERROR: Could not open camera3" &lt;&lt; endl;
        exit(1);
    }

        VideoCapture camera4("4.mp4");

    if (!camera4.isOpened()) 
    {
        cout &lt;&lt; "ERROR: Could not open camera4" &lt;&lt; endl;
        exit(1);
    }


    int mode = 0;
    while(1)
    {
        Mat frame1, frame2, frame3, frame4;
        
        camera1 &gt;&gt; frame1;
        if (frame1.empty()) {
            cout &lt;&lt; "ERROR! blank frame1 grabbed\n";
            break;
        }
        
        camera2 &gt;&gt; frame2;
        if (frame2.empty()) {
            cout &lt;&lt; "ERROR! blank frame2 grabbed\n";
            break;
        }

        camera3 &gt;&gt; frame3;
        if (frame3.empty()) {
            cout &lt;&lt; "ERROR! blank frame3 grabbed\n";
            break;
        }

        camera4 &gt;&gt; frame4;
        if (frame4.empty()) {
            cout &lt;&lt; "ERROR! blank frame4 grabbed\n";
            break;
        }


        switch(mode)
        {
            case 1:

                putText( frame1, "Camera 1", Point(20, 70), FONT_HERSHEY_TRIPLEX, 2, Scalar(0, 255, 0) );                
                imshow("Webcam", frame1);
            break;

            case 2:

                putText( frame2, "Camera 2", Point(20, 70), FONT_HERSHEY_TRIPLEX, 2, Scalar(0, 255, 0) );                
                imshow("Webcam", frame2);
            break;

            case 3:

                putText( frame3, "Camera 3", Point(20, 70), FONT_HERSHEY_TRIPLEX, 2, Scalar(0, 255, 0) );                
                imshow("Webcam", frame3);
            break;

            case 4:

                putText( frame4, "Camera 4", Point(20, 70), FONT_HERSHEY_TRIPLEX, 2, Scalar(0, 255, 0) );                
                imshow("Webcam", frame4);
            break;

            default:
                Mat imgh1;
                Mat imgh2;
                Mat img_result;


                hconcat(frame1, frame2, imgh1);
                hconcat(frame3, frame4, imgh2);
                vconcat(imgh1, imgh2, img_result);

                putText( img_result, "ALL", Point(20, 70), FONT_HERSHEY_TRIPLEX, 2, Scalar(0, 255, 0) );

                imshow("Webcam", img_result);
            break;
        }


        int key = waitKey(1);

        if ( key - '0' &gt;= 0 &amp;&amp; key - '0' &lt; 5 )
            mode = key - '0';
        
        if (key == 27)
            break;
    }
    return 0;
}</code></pre>





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멈춤보단 천천히라도

webnautes

4분할로 웹캠 또는 동영상을 보여주는 OpenCV C++ 예제 코드입니다. 2021. 12. 4 – 최초작성 초기화면 또는 0을 누른 경우에는 4개의 영상을 4분할로 보여주며 1 ~ 4 사이 숫자 누르면 영상 1개씩 전체화면으로 보여줍니다. 테스트에 사용한 영상을 캡처한 결과입니다.  요청 있을시 이미지를 삭제하도록 하겠습니다. 전체 소스 코드입니다.
The post 4분할로 웹캠 또는 동영상을 보여주는 OpenCV C++ 예제 first appeared on 멈춤보단 천천히라도.

4분할로 웹캠 또는 동영상을 보여주는 OpenCV C++ 예제

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