利用最小二乘法将物体的轮廓拟合成椭圆形，返回椭圆的中心坐标，长短半轴的长度，取向，并画出拟合后的椭圆-Using least square method to fit the object outline of synthetic elliptic, return to the center of the ellipse coordinates, the length of the length of the half shaft, orientation, and draw the oval