將OpenCV添加到VC++ Kinect SDK示例的奇怪代碼行爲

Question

我是C++的新手，並嘗試將OpenCV添加到Microsoft的Kinect示例中。我可以通過修改此功能來爲ColorBasics-D2D樣本做到這一點

void CColorBasics::ProcessColor() 
{ 
HRESULT hr; 
NUI_IMAGE_FRAME imageFrame; 

// Attempt to get the color frame 
hr = m_pNuiSensor->NuiImageStreamGetNextFrame(m_pColorStreamHandle, 0, &imageFrame); 
if (FAILED(hr)) 
{ 
    return; 
} 

INuiFrameTexture * pTexture = imageFrame.pFrameTexture; 

NUI_LOCKED_RECT LockedRect; 

// Lock the frame data so the Kinect knows not to modify it while we're reading it 
pTexture->LockRect(0, &LockedRect, NULL, 0); 


// Make sure we've received valid data 
if (LockedRect.Pitch != 0) 
{ 
    BYTE * pBuffer = (BYTE*) LockedRect.pBits; 

    cvSetData(img,(BYTE*) pBuffer, img->widthStep); 
    Mat &m = Mat(img); 
    Mat &hsv = Mat(); 
    vector<Mat> mv = vector<Mat>(3,Mat(cvSize(640,480),CV_8UC1)); 
    cvtColor(m,hsv,CV_BGR2HSV); 
    cvtColor(hsv,m,CV_HSV2BGR);//*/ 
    IplImage iplimg(m); 
    cvNamedWindow("rgb",1); 
    cvShowImage("rgb",&iplimg); 
    // Draw the data with Direct2D 
    m_pDrawColor->Draw(static_cast<BYTE *>(LockedRect.pBits), LockedRect.size); 

    // If the user pressed the screenshot button, save a screenshot 
    if (m_bSaveScreenshot) 
    { 
     WCHAR statusMessage[cStatusMessageMaxLen]; 

     // Retrieve the path to My Photos 
     WCHAR screenshotPath[MAX_PATH]; 
     GetScreenshotFileName(screenshotPath, _countof(screenshotPath)); 

     // Write out the bitmap to disk 
     hr = SaveBitmapToFile(static_cast<BYTE *>(LockedRect.pBits), cColorWidth, cColorHeight, 32, screenshotPath); 

     if (SUCCEEDED(hr)) 
     { 
      // Set the status bar to show where the screenshot was saved 
      StringCchPrintf(statusMessage, cStatusMessageMaxLen, L"Screenshot saved to %s", screenshotPath); 
     } 
     else 
     { 
      StringCchPrintf(statusMessage, cStatusMessageMaxLen, L"Failed to write screenshot to %s", screenshotPath); 
     } 

     SetStatusMessage(statusMessage); 

     // toggle off so we don't save a screenshot again next frame 
     m_bSaveScreenshot = false; 
    } 
} 

// We're done with the texture so unlock it 
pTexture->UnlockRect(0); 

// Release the frame 
m_pNuiSensor->NuiImageStreamReleaseFrame(m_pColorStreamHandle, &imageFrame); 
} 

這工作正常。但是，當我想將這樣的內容添加到SkeletalViewer示例中時，它只是顯示一個空窗口。

/// <summary> 
/// Handle new color data 
/// </summary> 
/// <returns>true if a frame was processed, false otherwise</returns> 
bool CSkeletalViewerApp::Nui_GotColorAlert() 
{ 
NUI_IMAGE_FRAME imageFrame; 
bool processedFrame = true; 

HRESULT hr = m_pNuiSensor->NuiImageStreamGetNextFrame(m_pVideoStreamHandle, 0, &imageFrame); 

if (FAILED(hr)) 
{ 
    return false; 
} 

INuiFrameTexture * pTexture = imageFrame.pFrameTexture; 
NUI_LOCKED_RECT LockedRect; 
pTexture->LockRect(0, &LockedRect, NULL, 0); 
if (LockedRect.Pitch != 0) 
{ 
    BYTE * pBuffer = (BYTE*) LockedRect.pBits; 

    cvSetData(img,(BYTE*) pBuffer, img->widthStep); 
    Mat m(img); 
    IplImage iplimg(m); 
    cvNamedWindow("rgb",1); 
    cvShowImage("rgb",&iplimg); 
    m_pDrawColor->Draw(static_cast<BYTE *>(LockedRect.pBits), LockedRect.size); 
} 
else 
{ 
    OutputDebugString(L"Buffer length of received texture is bogus\r\n"); 
    processedFrame = false; 
} 

pTexture->UnlockRect(0); 

m_pNuiSensor->NuiImageStreamReleaseFrame(m_pVideoStreamHandle, &imageFrame); 

return processedFrame; 
} 

我不知道爲什麼相同的代碼在這個例子中不起作用。我正在使用Visual Studio 2010和OpenCV 2.4.2。

謝謝

Answer 1

想通了。將其更改爲此

if (LockedRect.Pitch != 0) 
{ 
    BYTE * pBuffer = static_cast<BYTE *>(LockedRect.pBits); 

    cvSetData(img,(BYTE*) pBuffer, img->widthStep); 
    Mat m(img); 
    IplImage iplimg(m); 
    cvNamedWindow("rgb",1); 
    cvShowImage("rgb",&iplimg); 
    waitKey(1); 
    m_pDrawColor->Draw(static_cast<BYTE *>(LockedRect.pBits), LockedRect.size); 
}