WinCv

Who needs this?

Any OpenCV user who wants to display images conviniently in MS Windows.

Downloads

WinCv.h, WinCv.cpp.

Usage/Comment

Example (MFC with document support)

===== MyExampleDoc.h =====

...
#include <cv.h>
#include <highgui.h>
#include <WinCv.h>
...
class CMyExampleDoc : public CDocument
{
...
public:
	void DisplayFrame();

protected:
	CvCapture *m_pCapture;
	WinCv m_WinCv;
	bool m_InitView;
	IplImage *m_pCurrentImage;
	void DisplayImage(IplImage *pImage);
...
}

===== MyExampleDoc.cpp =====

#include <cv.h>
#include <highgui.h>
#include "WinCv.h"

...

CMyExampleDoc::CMyExampleDoc()
{
	...
	m_pCurrentImage = NULL;
	m_InitView = false;
}

BOOL CMyExampleDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
	m_pCapture = cvCreateFileCapture(lpszPathName);
	if (!m_pCapture) return FALSE;
	IplImage *p_image = cvQueryFrame(m_pCapture);
	if (!p_image) return FALSE;

	m_InitView = false; 
	DisplayImage(p_image);
}

// Public member. Called by View->OnDraw (see below)
void CMyExampleDoc::DisplayFrame()
{
	if (!m_InitView)
	{
	POSITION posV = GetFirstViewPosition();
	CMyExampleView *view = (CMyExampleView *) GetNextView(posV);
	m_WinCv.InitializeWindow(view->m_hWnd, view->GetParentFrame()->m_hWnd);
	m_WinCv.InitializeImage(ppCurrentImage);
	m_InitView = true;
	}

	m_WinCv.DisplayImage(m_pCurrentImage);
}

// Private member. Call this whenever you want to update the image.
void CMyExampleDoc::DisplayImage(IplImage *pImage)
{
	if (m_pCurrentImage) cvReleaseImage(&m_pCurrentImage);
	m_pCurrentImage = cvCloneImage(pImage);
	m_WinCv.DisplayImage(m_pCurrentImage);
}

===== MyExampleView.cpp =====

...

void CMyExampleView::OnDraw(CDC* pDC)
{
	CVideoConverterDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	pDoc->DisplayFrame();
}

...

Q&A : How about MFC with Dialog or an additional view?

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Sorry but I'm not responsible for any problems that may be caused by these downloads.

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