code: public static CameraPinholeBrown loadPinholeRadial(String fileName ) {
  		FileStorage fs = new FileStorage(
  				new File(fileName).getAbsolutePath(), FileStorage.READ);
  
  		IntPointer width = new IntPointer(1);
  		IntPointer height = new IntPointer(1);
  
  		read(fs.get("image_width"),width,-1);
  		read(fs.get("image_height"),height,-1);
  		Mat K = new Mat();
  		read(fs.get("camera_matrix"),K);
  		Mat distortion = new Mat();
  		read(fs.get("distortion_coefficients"),distortion);
  
  		CameraPinholeBrown boof = new CameraPinholeBrown();
  		boof.width = width.get();
  		boof.height = height.get();
  
  		DoubleRawIndexer indexerK = K.createIndexer();
  		boof.fx = indexerK.get(0,0);
  		boof.skew = indexerK.get(0,1);
  		boof.fy = indexerK.get(1,1);
  		boof.cx = indexerK.get(0,2);
  		boof.cy = indexerK.get(1,2);
  
  		DoubleRawIndexer indexerD = distortion.createIndexer();
  
  		if( distortion.rows() >= 5 )
  			boof.setRadial(indexerD.get(0,0),indexerD.get(1,0),indexerD.get(4,0));
  		else if( distortion.rows() >= 2 )
  			boof.setRadial(indexerD.get(0,0),indexerD.get(1,0));
  		if( distortion.rows() >= 5 )
  			boof.fsetTangental(indexerD.get(2,0),indexerD.get(3,0));
  
  		return boof;
  	}
docs: Loads a pinhole camera model with radian and tangential distortion in OpenCV format
  
  @param fileName path to file
  @return CameraPinholeRadial