程序使用差分盒计数算法将输入图像转换为分形维数（fd）图像，即每个像素都有自己的fd。然后用户可以在生成的fd图像中选择任何感兴趣的区域来估计相应的平均值、标准差和缺陷。(The program transforms an input image using the differential box counting algorithm to a fractal dimension (FD) image, i.e. each pixel has its own FD. Then the user can select any region of interest in the generated FD image to estimate the corresponding mean, standard deviation and lacunarity.)