多项式法实现图像的纠正，首先根据公共点，按最小二乘法求出a、b的值，然后根据多项式法对图像进行纠正。-Polynomial method to realize image correction, first of all, according to the common point, according to the least squares method to find the value of a, b, and then based on the polynomial method for correcting the image.