Fuzzy analysis of subtraction image during evolvements of short cracks

Short crack can be dispersed while subvoxel model is introduced, function of text modeling is extended in CT (computed tomography) simulation system based on dos interface, modeling of short crack is realized. Short cracks were simulated and pixels were merged, evolvements of low resolution CT images were analyzed, abnormity induced by propagation of cracks was detected. With the aid of fuzzy membership degree of image, characteristic degree of short crack included in a pixel was proposed, and fuzzy analysis was carried out based on merged images. Under the same conditions, the characteristic degree of short crack included in a pixel is related to modalities of short cracks, and unrelated to material.