Estimate Homography to do 2D to 3D integration (8): Extract known points in pairs automatically

I. eye-tracker calibration to get the extrinsic parameter

   - some images are inappropriate in this processing, need to re-generate.

   - result:

II. Pre-testing the videos recorded by eye-tracker

    - The brightness is lower than using the webcam, which make the color-based segmentation work incorrect.

    - The small size of color markers need to be increased so that the viewing distance from eye-tracker to the object is far enough... fit the needs in real life