A New Method Based on Mid -Point of Common Vertical Line to Rebuild 3D Spatial Point

In the system of computer vision, we can take two cameras to synchronously capture two digital images of scenery from different angle, and then rebuild 3D shape and position of spatial scenery by computer. It is furthest basic to rebuild 3D spatial point P with method based on stereo vision. Theoretically we can compute 3D world coordinate of spatial point P by the method according intersection of two spatial lines emitted from the same point P, but in practical application, they don´t intersect because of checking error of corresponding points p₁ and p₂ of spatial point P in two images. This paper puts forward a new method which takes mid-point of common vertical line of two spatial lines not intersecting as the solution of spatial point P, moreover it validates this solution is classic in the meaning of making mean square error least. This new method is simple than method of least squares, furthermore it can satisfies mean square error least