画函数图像,有正弦函数，二次函数，高次函数，并带有求面积， 求解-print

LW细化算法是在ZS细化算法的基础上的改进 该算法避免了ZS算法过度腐蚀的缺点-LW thinning algorithm is improved on the basis of ZS thinning algorithm based on the algorithm avoids the disadvantages of excessive corrosion ZS algorithm