Recently, I am thinking about a problem regarding image projection. I have a larger picture as bellow.
I want to find the transformation matrix, x'=Hx. When the above image pass the transformation matrix H, I will get another smaller picture as bellow.
I have tried to use SIFT to find four major points and use these points to implement DLT algorithm. However, after executing SIFT, I find that there are many matching error as bellow. The distRatio is 0.5
I have thought for almost two weeks. Is there any different ideas which can be use to solve this problem. Thank you very much.