Estimate Homography to do 2D to 3D integration (3)

I. Implementation of homography in 2D space:

   - The 1st row shows the 3 images using in this implementation.

   - The 2nd row shows results after thresholding process to find points related to each color region

   - The '+' marker in the 2nd row point out the position of central points for each color region (... will use these points to find the matrix of homography at first, then using the matrices to do points mapping from one image to another )

      - The matrix of transformation of red area is like this:

      - The results of mapping (...do affine transformation) from 'Original' to 'Vertical flip'