选取几幅同类目标物体的二维图像，并标注轮廓点，不断迭代，寻找标准形状，利用最小二乘法寻找每个样本形状到这个标准形状的变化，校正去噪。(Select several two-dimensional images of similar objects, mark the contour points, iterate continuously, find the standard shape, use the least square method to find the change of eac