vs2015 下 win32 - opencv打开摄像头

include:

G:\CProgram\OpenCV\软件\opencv\build\include

lib:

G:\CProgram\OpenCV\软件\opencv\build\x86\vc12\lib

opencv_calib3d249.lib
opencv_calib3d249d.lib
opencv_contrib249.lib
opencv_contrib249d.lib
opencv_core249.lib
opencv_core249d.lib
opencv_features2d249.lib
opencv_features2d249d.lib
opencv_flann249.lib
opencv_flann249d.lib
opencv_gpu249.lib
opencv_gpu249d.lib
opencv_highgui249.lib
opencv_highgui249d.lib
opencv_imgproc249.lib
opencv_imgproc249d.lib
opencv_legacy249.lib
opencv_legacy249d.lib
opencv_ml249.lib
opencv_ml249d.lib
opencv_nonfree249.lib
opencv_nonfree249d.lib
opencv_objdetect249.lib
opencv_objdetect249d.lib
opencv_ocl249.lib
opencv_ocl249d.lib
opencv_photo249.lib
opencv_photo249d.lib
opencv_stitching249.lib
opencv_stitching249d.lib
opencv_superres249.lib
opencv_superres249d.lib
opencv_ts249.lib
opencv_ts249d.lib
opencv_video249.lib
opencv_video249d.lib
opencv_videostab249.lib
opencv_videostab249d.lib

 

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#include "opencv2/opencv.hpp"
using namespace cv;


int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
    _In_opt_ HINSTANCE hPrevInstance,
    _In_ LPWSTR    lpCmdLine,
    _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: 在此放置代码。

    VideoCapture cap(0); // open the default camera
    if (!cap.isOpened()) // check if we succeeded
        return -1;

    Mat edges;
    String s_title("edges");

    namedWindow(s_title, 1);
    for (;;)
    {
        Mat frame;
        cap >> frame;    // get a new frame from camera
        cvtColor(frame, edges, CV_BGR2GRAY);
        GaussianBlur(edges, edges, Size(7, 7), 1.5, 1.5);
        Canny(edges, edges, 0, 30, 3);
        imshow(s_title, edges);
        if (waitKey(30) >= 0) {
            break;
        }
    }


    // 初始化全局字符串
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_CONSOLEAPP01, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    // 执行应用程序初始化:
    if (!InitInstance(hInstance, nCmdShow))
    {
        return FALSE;
    }

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_CONSOLEAPP01));

    MSG msg;

    // 主消息循环:
    while (GetMessage(&msg, nullptr, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int)msg.wParam;
}