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Because of to the advantages of high sensitivity, nondestructive evaluation, and whole-field analysis, the interferographic technique is superior to other nondestructive evaluation (NDE) techniques. In this article, precut cracks 25 mm and 40 mm long that did not cut through the tire and that extended in different directions inside the tire were made. The interference fringes caused by the tire cracks under different pressures were obtained. By applying the proposed intensive characteristic model to the tires with internal defects, the position, length, and direction of the cracks can be evaluated. Results showed that the errors of experimental data are in good agreement; all were less than 7.6%.