Estimate Homography to do 2D to 3D integration (4): Extract known points in pairs automatically

I. Preliminary results in using Particle Filter to locate color markers automatically:

   - including zoom, tilt, rotation, viewpoint_change

II. Use the automatic method in my current framework... do see how it works in the process of "2D to 3D"

    - Find the process is not accurate and stable enough because of the following reasons:
      1. not accurate locate the central of the circular color markers
      2. Webcam moves to fast