Thanks Martin, and I'm happy you found the script useful.
Yes as you guessed, the standard deviation mainly depends on the type of image you anslyse. That is, the more homogeneous the texture in the image is, the more homogeneous the Fractal dimension becomes, and thus the lower the standard deviation; and vice versa. To check, try to apply the script to images with different textures (e.g. rough and fine) and compare your results.
Thanks for useful script.
But the estimate of fractal dimension has large standard deviation in many case when I used this script. Is it a proprerty of box-method or it depends on source image?
Thank for respond.