圆拟合算法的实现（VC） 包括：最小二乘精确解、最小二乘近似解、高斯牛顿法迭代解-circle fitting algorithm to achieve (VC), including : LS Exact solution, least squares approximate solution, Gaussian Newton iterative solution

基于光流的各种梯度计算方法 用拟牛顿法求极小值点和最速下降梯度法matlab程序-Based on optical flow of all kinds of gradient calculation