Estimate Homography to do 2D to 3D integration (13): Extract known points in pairs automatically

I. Maintain my code, and solve the problem that I can't randomly read video frames from a video:

   - Save the video into a Matfile


II. Collecting testing videos

    - Zoom, Tilt, Viewpoint_change are ok
    - Real Case Demo isn't not fine, because of unstable result of capturing color markers as known points