By means of two images of the same pair of parallel lines that are vertical and horizontal respectively, the scalefactor can be calculated.
该方法通过同一对平行边缘在垂直和水平方向的两幅图像，计算水平比例因子；
2
There is a linear relationship between differential reflectivity ZDR and the shape factor defined as the ratio of the horizontalscale to the vertical scale of a particle.