04-spline_fitter.py 文件源码

def cntr(self):
        '''returns a rough estimate of the circumference'''
        if self._cntr is None:
            new_pts = si.splev(np.linspace(0, 1, 1000), self.tck, ext=2)
            self._cntr = np.mean(new_pts, 1)
        return self._cntr