MapColorFrameToDepthFrame (未处理的异常，访问冲突)

Question

我尝试使用MapColorFrameToDepthFrame函数将深度图像与彩色图像对齐，但该行代码出现问题(未处理的异常，访问冲突)：

pMapper->MapColorFrameToDepthFrame(
        NUI_IMAGE_TYPE_COLOR,
        NUI_IMAGE_RESOLUTION_640x480,
        NUI_IMAGE_RESOLUTION_640x480,
        640 * 480, 
        (NUI_DEPTH_IMAGE_PIXEL*)LockedRect.Pitch,
        640 * 480, 
        depthPoints);

下面是Nui_GotDepthAlert的代码：

bool CSkeletalViewerApp::Nui_GotDepthAlert( ){
NUI_IMAGE_FRAME imageFrame;
bool processedFrame = true;

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

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

m_depthTimeStamp = imageFrame.liTimeStamp;

INuiFrameTexture * pTexture = imageFrame.pFrameTexture;
NUI_LOCKED_RECT LockedRect;
pTexture->LockRect( 0, &LockedRect, NULL, 0 );
if ( 0 != LockedRect.Pitch )
{
    INuiCoordinateMapper* pMapper;
    NUI_DEPTH_IMAGE_POINT* depthPoints;

    depthPoints = new NUI_DEPTH_IMAGE_POINT[640 * 480];
    m_pNuiSensor->NuiGetCoordinateMapper(&pMapper);

    //NUI_DEPTH_IMAGE_PIXEL* pdepthpixel = (NUI_DEPTH_IMAGE_PIXEL*)LockedRect.Pitch;

    pMapper->MapColorFrameToDepthFrame(
        NUI_IMAGE_TYPE_COLOR,
        NUI_IMAGE_RESOLUTION_640x480,
        NUI_IMAGE_RESOLUTION_640x480,
        640 * 480, 
        (NUI_DEPTH_IMAGE_PIXEL*)LockedRect.Pitch,
        640 * 480, 
        depthPoints);

    //memcpy(m_depthD16, LockedRect.pBits, LockedRect.size);

    DWORD frameWidth, frameHeight;

    NuiImageResolutionToSize( imageFrame.eResolution, frameWidth, frameHeight );

    // draw the bits to the bitmap
    BYTE * rgbrun = m_depthRGBX;
    const USHORT * pBufferRun = (const USHORT *)LockedRect.pBits;

    depthData = (USHORT *)LockedRect.pBits;


    // end pixel is start + width*height - 1
    const USHORT * pBufferEnd = pBufferRun + (frameWidth * frameHeight);

    assert( frameWidth * frameHeight * g_BytesPerPixel <= ARRAYSIZE(m_depthRGBX) );
    USHORT depth;
    USHORT* depth1=(USHORT *)LockedRect.pBits;
    USHORT realDepth;
    while ( pBufferRun < pBufferEnd )//&& pDepth < depthEnd)
    {
        /**depthValues = pDepth->depth;
        depthValues++;*/

        //USHORT depth     = *pBufferRun;
        depth     = *pBufferRun;
        USHORT realDepth = NuiDepthPixelToDepth(depth);
        USHORT player    = NuiDepthPixelToPlayerIndex(depth);

        // transform 13-bit depth information into an 8-bit intensity appropriate
        // for display (we disregard information in most significant bit)
        BYTE intensity = static_cast<BYTE>(~(realDepth >> 4));

        // tint the intensity by dividing by per-player values
        *(rgbrun++) = intensity >> g_IntensityShiftByPlayerB[player];
        *(rgbrun++) = intensity >> g_IntensityShiftByPlayerG[player];
        *(rgbrun++) = intensity >> g_IntensityShiftByPlayerR[player];

        // no alpha information, skip the last byte
        ++rgbrun;

        ++pBufferRun;
    }



    m_pDrawDepth->Draw( m_depthRGBX, frameWidth * frameHeight * g_BytesPerPixel );


}
else
{
    processedFrame = false;
    OutputDebugString( L"Buffer length of received texture is bogus\r\n" );
}

pTexture->UnlockRect( 0 );

if(m_pDepthStreamHandle != NULL)
    m_pNuiSensor->NuiImageStreamReleaseFrame( m_pDepthStreamHandle, &imageFrame );  




return processedFrame;

}

有人能告诉我如何解决这个问题吗？

谢谢

Answer 1

那里,

我也遇到了一些类似的问题，在苦苦挣扎了很长时间之后，我终于找到了它的诀窍。

我在你的代码中发现的第一个问题是在MapColorFrameToDepthFrame函数中，第五个参数应该是LockedRect.pBits。

第二个问题是如何定义pTexture，

INuiFrameTexture* pTexture = imageFrame.pFrameTexture;

不会起作用。你必须使用

m_pNuiSensor->NuiImageFrameGetDepthImagePixelFrameTexture(m_hDepthStreamHandle, &imageFrame, &bNearMode, &pTexture)

请记住检查此函数是否成功。我已经深入挖掘，找出原因。

第三个问题是，你必须

delete[] depthPoints;

使用后释放到内存中，因为你对它使用了new运算符。

在这一切之后，我的代码终于可以工作了。希望能对你有所帮助。

谢谢。