OpenCV goodies

• Set new window position:

• cvMoveWindow("image", 10, 50);

• write/read xml/yml using FileStorage:
• Read:

  FileStorage storage("test.xml", FileStorage::READ);
  storage["depth_1"] >> img;
  storage.release();

• write:

  FileStorage storage("test.yml", FileStorage::WRITE);
  storage << "img" << img;
  storage.release(); 

• release previous image content:

• cvReleaseImage(&images[i]);

• matrix type conversion:

• cv::Mat A = loadMat("mymat.xml");
  A.convertTo(A, CV_32FC1); // or CV_64FC1