[MFC][OpenCV] DC to IplImage

중간중간 여러가지로 많이 막혔다 -_-;
OpenCV 를 처음 접하면서 장점, 단점 많이 느끼면서 짠 소스.

역시 정보는 공유하자는 취지에서 OpenCV 초보지만 그래도 당당히 올린다.

- DC의 용량이 16MB 한계인 점도 처음 알았음 -_-;
- CreateCompatibleBitmap 보단 CreateDIBSection 을 사용하는게 좋다.

 

IplImage* DCtoIplImage(CDC* pDC) { pDC->GetWindow()->GetClientRect(rect); int cx = rect.right - rect.left; int cy = rect.bottom - rect.top; if(cx <= 0 || cy <= 0) return NULL; HDC hMemDC; hMemDC = CreateCompatibleDC(pDC->m_hDC); BITMAPINFO bmi; BITMAPINFOHEADER* bmih = &(bmi.bmiHeader); LPVOID pBits; HBITMAP hBitmap; ZeroMemory(bmih, sizeof(BITMAPINFOHEADER)); bmih->biSize = sizeof(BITMAPINFOHEADER); bmih->biBitCount = 24; bmih->biWidth = cx; bmih->biHeight = cy; bmih->biPlanes = 1; hBitmap = CreateDIBSection(pDC->m_hDC, &bmi, DIB_RGB_COLORS, (LPVOID*)&pBits, NULL, 0); SelectObject(hMemDC, hBitmap); BitBlt(hMemDC, 0, 0, cx, cy, pDC->m_hDC, rect.left, rect.top, SRCCOPY); DeleteDC(hMemDC); hMemDC = NULL; bool bMustRelease = false; const int nDepth = IPL_DEPTH_8U; const int nChannels = 3; if(hMemDC == NULL) { hMemDC = ::GetDC(NULL); bMustRelease = true; } IplImage* img = NULL; if(GetDIBits(hMemDC, hBitmap, 0, 0, NULL, &bmi, DIB_RGB_COLORS)) { int nHeight = (bmih->biHeight > 0) ? bmih->biHeight : -bmih->biHeight; img = cvCreateImage(cvSize(bmih->biWidth, nHeight), nDepth, nChannels); img->origin = (bmih->biHeight > 0); bmih->biBitCount = (WORD)(img->nChannels * 8); bmih->biCompression = BI_RGB; GetDIBits(hMemDC, hBitmap, 0, nHeight, img->imageData, &bmi, DIB_RGB_COLORS); } if(bMustRelease) ::ReleaseDC(NULL, hMemDC); DeleteObject(hBitmap); return img; }