about image processing & multifractal calculation & value and S.D. of multifractal parameters
Three supplementary files are included: A. Morphological processing flow of binary fracture images.docx, B. Calculation of intermediate variables by using MATLAB.docx, and C. Value and S.D. of multifractal parameters. The file A describes the image processing flow from optical fracture images to binary fracture images. The file B contains the calculation method of intermediate variables of multifractal analysis by MATLAB. The value and standard deviation of Dq, a, and f(a) of all the tested samples are summarized in the file C.