Abstract: In order to find out the evolvement regularity of surface cracks in soil due to drying shrinkage, an analysis system of crack’s parameters was developed by using MATLAB. Through binarization, crack restoration, noise reduction and skeleton extraction, the morphological parameters of cracks, such as crack rate, length, width, width grading and fractal dimension, were computed by further recognition methods. Through this system, the non-destructive, continuous and dynamic recognition of cracks, as well as the rapid and accurate quantitative analysis of morphological parameters were achieved. Moreover, this system offered a reliable basis for the analysis of dynamic evolvement of cracks. It can be used in slope stability analysis, environmental pollution-control and many other areas.

Key words: crack, morphological parameter, binarization, image recognition, crack width grading