[IGSTK-Users] Video frame spatial object

[Fabian Torres]

Hi.

I´m trying to use the videoframespatialobject class, with an epiphan
dvi2usb card (http://www.epiphan.com/products/frame-grabbers/dvi2usb-3-0/)

I biuld a class that has igstk::videoimager as parent to configure my card,
I´m able to extract frames and save them in jpg, bmp and so on.

The problem come when I try to display the frame grabber video using
 igstkVideoimager and igstkVideoImagerTool.

I´m gettin images in grayscale of 8 bits, so I configure my
VideoFrameObjectType like this

typedef igstk::VideoFrameSpatialObject<unsigned char, 1>
VideoFrameObjectType;

 VideoFrameObjectType::Pointer m_VideoFrame = VideoFrameObjectType::New();
  m_VideoFrame->SetWidth(640);
  m_VideoFrame->SetHeight(480);
  m_VideoFrame->SetPixelSizeX(1);
  m_VideoFrame->SetPixelSizeY(1);
  m_VideoFrame->SetNumberOfScalarComponents(1);
  m_VideoFrame->Initialize();

and my videoimager and videoimagertool like this

 typedef igstk::VideoFrameRepresentation<VideoFrameObjectType>
VideoFrameRepresentationType;

  VideoFrameRepresentationType::Pointer m_VideoFrameRepresentation =
VideoFrameRepresentationType::New();

m_VideoFrameRepresentation->RequestSetVideoFrameSpatialObject(m_VideoFrame);

  m_GUI->View->RequestAddObject(m_VideoFrameRepresentation);

  igstk::EpiphanVideoImager::Pointer videoImager =
igstk::EpiphanVideoImager::New();
  videoImager->RequestSetFrequency(VideoImager_DEFAULT_REFRESH_RATE);
  videoImager->RequestOpen();

  igstk::VideoImagerTool::Pointer videoImagerTool;
  igstk::EpiphanVideoImagerTool::Pointer videoImagerEpiphanTool =
igstk::EpiphanVideoImagerTool::New();

  unsigned int dims[3];
  dims[0] = 640;
  dims[1] = 480;
  dims[2] = 1;

  videoImagerEpiphanTool->SetFrameDimensions(dims);
  videoImagerEpiphanTool->SetPixelDepth(8);
  videoImagerEpiphanTool->RequestSetVideoImagerToolName("Frame grabber");
  videoImagerEpiphanTool->RequestConfigure();


I´m able to see the image in an igstk scene, the prblem is I se a binary
image (black and white) instead of a gray scale image, I do not know what
is the problem.
In my igstk::EpihanVideoImager class there is a part that copy the grabbed
frame data to the igstk::VideoFrame, could I make a mistake here?

typedef igstk::Frame   FrameType;
 FrameType* frame = new FrameType();
      frame = this->GetVideoImagerToolFrame(

imagerToolContainer[deviceItr->first]);

      unsigned int frameDims[3];
      imagerToolContainer[deviceItr->first]->GetFrameDimensions(frameDims);

      EpiphanVideoImager::m_FrameBufferLock->Lock();

  if( frameBuffer != NULL)
      {
    int numberOfBytesToSkip;
    numberOfBytesToSkip = 0;

    unsigned char* byteImageDataPtr=reinterpret_cast<unsigned
char*>(frameBuffer->pixbuf);
        memcpy(frame->GetImagePtr(),
byteImageDataPtr,
                frameDims[0]*frameDims[1]*frameDims[2]);

}
      }


I hope someone could help me. Thanks

-- 
Fabián Torres Robles
Maestria en Ciencias en Ingeniería Electrónica
Ingeniería en Sistemas Electrónicos
tel. 58081280, 0445534661338
e-mail fabian.trobles at gmail.com, dae.wong at gmail.com
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