opencv와 wxwidgets을 연동하여 웹캠에서 캡처한 영상을 화면에 출력하기

웹캠으로 부터 입력된 영상을 wxwidgets의 panel에 출력해주는 프로그램을 참고에 있는 소스코드를 참고하여 구현했습니다.

 

컴파일을 하려면..

$ g++ -o main main.cpp ` wx-config --cflags --libs` `pkg-config opencv --libs --cflags`

#include <wx/wx.h>
#include <wx/sizer.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
 
 
#define TIMER_ID 1000
 
 
using namespace cv;
using namespace std;
 
class wxImagePanel : public wxPanel
{
    wxBitmap image;
    wxTimer timer;
    VideoCapture capture;
 
    DECLARE_EVENT_TABLE()
 
public:
    wxImagePanel(wxFrame* parent);
 
    void paintEvent(wxPaintEvent & evt);
    void paintNow();
    void OnTimer( wxTimerEvent& event ); 
    void render(wxDC& dc);
 
};
 
 
BEGIN_EVENT_TABLE(wxImagePanel, wxPanel)
    // catch paint events
    EVT_PAINT(wxImagePanel::paintEvent)
 
    EVT_TIMER(TIMER_ID, wxImagePanel::OnTimer)
END_EVENT_TABLE()
 
 
 
wxImagePanel::wxImagePanel(wxFrame* parent) :
wxPanel(parent),timer(this, TIMER_ID)
{
    capture = VideoCapture(0);
    timer.Start(1000/30);//30 fps
}
 
 
/*
* Called by the system of by wxWidgets when the panel needs
* to be redrawn. You can also trigger this call by
* calling Refresh()/Update().
*/
 
void wxImagePanel::paintEvent(wxPaintEvent & evt)
{
     // depending on your system you may need to look at double-buffered dcs
    wxPaintDC dc(this);
    render(dc);
}
 
 
 
void wxImagePanel::OnTimer(wxTimerEvent& event)
{
    Mat frame;
 
    capture >> frame;
 
    if (frame.channels() == 3)
         cv::cvtColor(frame, frame, CV_BGR2RGB);
 
    wxImage tmp = wxImage(frame.cols, frame.rows, frame.data, TRUE);
    image = wxBitmap(tmp);
 
    paintNow();
}
 
 
 
/*
* Alternatively, you can use a clientDC to paint on the panel
* at any time. Using this generally does not free you from
* catching paint events, since it is possible that e.g. the window
* manager throws away your drawing when the window comes to the
* background, and expects you will redraw it when the window comes
* back (by sending a paint event).
*/
void wxImagePanel::paintNow()
{
    // depending on your system you may need to look at double-buffered dcs
    wxClientDC dc(this);
    render(dc);
}
 
/*
* Here we do the actual rendering. I put it in a separate
* method so that it can work no matter what type of DC
* (e.g. wxPaintDC or wxClientDC) is used.
*/
void wxImagePanel::render(wxDC&  dc)
{
    dc.DrawBitmap(image, 0, 0, false);
}
 
 
 
class MyApp : public wxApp
{
 
    wxFrame *frame;
    wxImagePanel * drawPane;
public:
    bool OnInit()
    {
        // make sure to call this first
        wxInitAllImageHandlers();
 
        wxBoxSizer* sizer = new wxBoxSizer(wxHORIZONTAL);
        frame = new wxFrame(NULL, wxID_ANY, wxT("wxBitmap"), wxPoint(50, 50), wxSize(800, 600));
 
        drawPane = new wxImagePanel(frame);
        sizer->Add(drawPane, 1, wxEXPAND);
 
        frame->SetSizer(sizer);
 
        frame->Show();
        return true;
    }
 
};
 
IMPLEMENT_APP(MyApp)
 

참고

http://kimoscode.blogspot.kr/2010/02/opencv-20-%EC%97%90%EC%84%9C-%EC%9B%B9%EC%BA%A0-%EC%98%81%EC%83%81-%EC%BA%A1%EC%B2%98%ED%95%98%EA%B8%B0.html

http://nzkyss.blogspot.kr/2014/07/wxwidgetsopencv.html