how to find the homography matrix that maps a 2D image point to a 3D world point on a known plane

lets say homography matrix be h and my points are:p[0] = x:40 y:115 p[1] = x:41 y:120 p[2] = x:43 y:232 p[3] = x:44 y:212 if anyone need more details or explanation plzz tell but i thnk dis time i have provided details I want that homography matrix

[praveen rai]

@john d'erico y did u close my ques what is wrong in my ques i just want d code if someone know i dont know how to proceed i have explained in ques what i want