Then Γ i s approaching round is got with the method of regression and the results are very perfect.

To avoid these defects,using elliptic fitting technique,a non-contact real-time measurement system based on grid strain was established.

Application of Arc Fitting in NC Machining of Noncircular Profile Curve;

In order to enhance tooth form precision of hobbing and shaving cutter, arc fitting method has been applied to tooth form manufacturing of involute worm in the investigation of gear hobbing and shaving cutter with big modular, hard face, and high precision.

Optimal ellipse fitting method based on least-square principle;

Face tracking algorithm based on mean shift and ellipse fitting;

Application of ellipse fitting method to calibration of magnetic compass deviation

To improve the precision of cylinder fitting,aiming at the trait of ancient building emulation,a robust cylinder fitting method was put forward,which at first got initial cylinder parameter values by Gauss image,then fit cylinder by nonlinear least squares for parameterized distance function.

To improve the precision of cylinder fitting ,aiming at the trait of ancient building emulation, a robust cylinder fitting method is put forward, which at first gets initial cylinder parameter values by Gauss Image, then fits cylinder by Nonlinear Least Squares for parameterized distance function.