Rotational stereovision rotary axis determining method based on quadratic curve fitting

A rotational stereovision rotary axis determining method based on quadratic curve fitting includes steps: firstly, acquiring trace of points on an image; secondly, acquiring some discrete points on a projection image of a spatial circle formed by a certain rotating point and obtaining a corresponding quadratic curve by fitting the discrete points; thirdly, solving an image of a line at infinity; fourthly, defining the projection of a spatial circle formed by a certain spatial rotating point as a quadratic curve Ci, accordingly the corresponding center oi=Cil infinity, being the projection of a certain point on the rotary axis; and fifthly, resetting up the center point to obtain a spatial point on the rotary axis after the center point of the quadratic curve is obtained; and sixthly, obtaining the rotational stereovision rotary axis by fitting the points on the rotary axis. The rotational stereovision rotary axis determining method based on quadratic curve fitting is capable of simplifying calculation and improving precision and has high practicality.