The diameter parallel to the image-plane is taken as characteristic diameter,by which the depth information for the target plane can be got from elliptic figures on the image-plane easily,so the solution of the inverse-perspective-transformation can be made simple and accurate.

Application of gas drainage technology with large diameter horizontal borehole to Qianqiu Coal Mine;

Study on the manufacturing and dressing of large diameter diamond wheel for centreless grinding;

Numerical control programming research of the large diameter and steep-lead multiple-trapeziform screw thread;