示例#1
0
	// The initialisation function
	__declspec(dllexport) void alvar_init(int width, int height)
	{
		w = width;
		h = height;

		// Calibration. See manual and ALVAR internal samples how to calibrate your camera
		// Calibration will make the marker detecting and marker pose calculation more accurate.
		if (! camera.SetCalib("Calibrations/default_calib.xml", w, h)) {
			camera.SetRes(w, h);
		}
		
		// Set projection matrix as ALVAR recommends (based on the camera calibration)
		double p[16];
		camera.GetOpenglProjectionMatrix(p, w, h);

		//Initialize the multimarker system
		for(int i = 0; i < MARKER_COUNT; ++i)
			markerIdVector.push_back(i);

		// We make the initialization for MultiMarkerBundle using a fixed marker field (can be printed from MultiMarker.ppt)
		markerDetector.SetMarkerSize(CORNER_MARKER_SIZE);
		markerDetector.SetMarkerSizeForId(0, CENTRE_MARKER_SIZE);
		
		multiMarker = new alvar::MultiMarker(markerIdVector);
		
		alvar::Pose pose;
		pose.Reset();

		// Add the 5 markers
		multiMarker->PointCloudAdd(0, CENTRE_MARKER_SIZE, pose);
		
		pose.SetTranslation(-10, 6, 0);
		multiMarker->PointCloudAdd(1, CORNER_MARKER_SIZE, pose);
		
		pose.SetTranslation(10, 6, 0);
		multiMarker->PointCloudAdd(2, CORNER_MARKER_SIZE, pose);
		
		pose.SetTranslation(-10, -6, 0);
		multiMarker->PointCloudAdd(3, CORNER_MARKER_SIZE, pose);
		
		pose.SetTranslation(+10, -6, 0);
		multiMarker->PointCloudAdd(4, CORNER_MARKER_SIZE, pose);

		trackerStat.Reset();
	}
/** 
 * @function init
 * @brief Initialize required parameters
 */
bool init( int _devIndex, 
	   int _camIndex,
	   alvar::Capture **_cap ) {
  
  std::cout << "Reading /dev/video"<<_devIndex<<" and camera "<<_camIndex<< std::endl;  
  gCalibFilename = CAM_CALIB_NAME[_camIndex];

  /** Load calibration file */
  std::cout<<"** Loading calibration file: "<< gCalibFilename << std::endl;
  if ( gCam.SetCalib( gCalibFilename.c_str(), 
		      gWidth, gHeight) ) {
    std::cout<<"\t Loaded camera calibration file successfully"<<std::endl;
  } else {
    gCam.SetRes( gWidth, gHeight );
    std::cout<<"\t Failed to load camera calibration file"<<std::endl;
  }
  
  /** Set camera matrix into the viewer */
  double p[16];
  gCam.GetOpenglProjectionMatrix( p,
				  gWidth,
				  gHeight );
  
  GlutViewer::SetGlProjectionMatrix(p);
  for (int i=0; i<32; i++) {
    d[i].SetScale( gMarker_size);
  }
  std::cout << "\t * Set Viewer with camera matrix"<<std::endl;
  

  /** Create capture object from camera */
  
  /*-- Enumerate possible capture plugins --*/
  alvar::CaptureFactory::CapturePluginVector plugins = alvar::CaptureFactory::instance()->enumeratePlugins();
  if (plugins.size() < 1) {
    std::cout << "\t Could not find any capture plugins." << std::endl;
    return 0;
  }
  
  /*-- Display capture plugins --*/
  std::cout << "Available Plugins: ";
  outputEnumeratedPlugins(plugins);
  std::cout << std::endl;
  
  /*-- Enumerate possible capture devices --*/
  alvar::CaptureFactory::CaptureDeviceVector devices = alvar::CaptureFactory::instance()->enumerateDevices();
  if (devices.size() < 1) {
    std::cout << "\t [X] Could not find any capture devices." << std::endl;
    return 0;
  }
  
  /*-- Check if _devIndex can be used --*/
  int selectedDevice;
  if( _devIndex > devices.size() ) {
    std::cout << "Device index /dev/video"<<_devIndex<<" bigger than the size of devices vector." << std::endl;
    return false;
  } 
  
  selectedDevice = _devIndex;
  
  
  /**- Display capture devices (DEBUG) --*/
  std::cout << "Enumerated Capture Devices:" << std::endl;
  outputEnumeratedDevices(devices, selectedDevice);
  std::cout << std::endl;
  
  /*-- Create capture object from camera --*/
   *_cap = CaptureFactory::instance()->createCapture( devices[selectedDevice] );

  return true;
}
示例#3
0
// main
int main(int argc, char** argv)
{
	osg::ArgumentParser arguments(&argc, argv);

	// Let's use the convenience system from ALVAR for capturing.
	// We initialize Highgui through the CaptureFactory (see manual for other options like AVI)
	alvar::CaptureFactory *factory = alvar::CaptureFactory::instance();
    alvar::CaptureFactory::CaptureDeviceVector devices = factory->enumerateDevices("highgui");

    // Check to ensure that a device was found
    if (devices.size() > 0) {
        capture = factory->createCapture(devices.front());
    }

	// Capture is central feature, so if we fail, we get out of here.
	if (capture && capture->start()) {
	   
		// Let's capture one frame to get video resolution
		IplImage *tempImg = capture->captureImage();
		videoXRes = tempImg->width;
		videoYRes = tempImg->height;

		// Calibration. See manual and ALVAR internal samples how to calibrate your camera
		// Calibration will make the marker detecting and marker pose calculation more accurate.
		if (! camera.SetCalib("calib.xml", videoXRes, videoYRes)) {
			camera.SetRes(videoXRes, videoYRes);
		}

		//Create the osg::Image for the video
		videoImage = new osg::Image;

		//Create the osg::Image for the texture (marker hiding)
		texImage = new osg::Image;
		
		//IplImage for the texture generation.
		markerHiderImage=cvCreateImage(cvSize(64, 64), 8, 4);

		// construct the viewer
		viewer = new osgViewer::Viewer(arguments);
		// Let's use window size of the video (approximate).
		viewer->setUpViewInWindow (200, 200, videoXRes, videoYRes);
		// Viewport is the same
		viewer->getCamera()->setViewport(0,0,videoXRes,videoYRes);
		viewer->setLightingMode(osg::View::HEADLIGHT);

		// Attach our own event handler to the system so we can catch the resizing events
		viewer->addEventHandler(new CSimpleWndSizeHandler(videoXRes,videoYRes ));
		
		// Set projection matrix as ALVAR recommends (based on the camera calibration)
		double p[16];
		camera.GetOpenglProjectionMatrix(p,videoXRes,videoYRes);
		viewer->getCamera()->setProjectionMatrix(osg::Matrix(p));

		// Create main root for everything
		arRoot = new osg::Group;
		arRoot->setName("ALVAR stuff (c) VTT");
		
		// Init the video background class and add it to the graph
        videoBG.Init(videoXRes,videoYRes,(tempImg->origin?true:false));
		arRoot->addChild(videoBG.GetOSGGroup());

		// Create model switch and add it the to graph
		modelSwitch = new osg::Switch;
		arRoot->addChild(modelSwitch.get());

		// Create model transformation for the markers and add them under the switch
		mtForMarkerFive = new osg::MatrixTransform;
		mtForMarkerTen = new osg::MatrixTransform;
		modelSwitch->addChild(mtForMarkerFive.get());
		modelSwitch->addChild(mtForMarkerTen.get());

		// add the texture under the marker transformation node
		mtForMarkerFive->addChild(texOnMarker.GetDrawable());

		// All models off
		modelSwitch->setAllChildrenOff();

		// load the data (models).
		modelForMarkerFive = osgDB::readNodeFile("grid.osg");
		modelForMarkerTen = osgDB::readNodeFile("axes.osg");
	    
		// If loading ok, add models under the matrixtransformation nodes.
		if(modelForMarkerFive)
			mtForMarkerFive->addChild(modelForMarkerFive.get());

		if(modelForMarkerTen)
			mtForMarkerTen->addChild(modelForMarkerTen.get());
	    
		// Tell the ALVAR the markers' size (same to all)
		// You can also specify different size for each individual markers
		markerDetector.SetMarkerSize(MARKER_SIZE);

		// Set scene data 
		viewer->setSceneData(arRoot.get());

		// And start the main loop
		while(!viewer->done()){
			//Call the rendering function over and over again.
			renderer();
		}
	} 
	// Time to close the system
	if(capture){
		capture->stop();
		delete capture;
	}

	if(markerHiderImage)
		cvReleaseImage(&markerHiderImage);
	
	return 0; // bye bye. Happy coding!
}