Earticle

In this paper, we propose an automatic scratch inspection method to detect small scratches from eyeglasses using fuzzy logic. Inspecting scratches of eyeglasses largely depends on the native eye exam of field opticians that may lead providing possibly harmful eyeglasses to customers at optician's shop. Usually those small scratches are often occurred in the process of transportation rather than that of production thus field opticians have burden of preventing selling defected lenses. Our method computes the possibility of ill-effect by scratch on glasses with membership degree of the scratch size and that of distance between the center and the scratch from candidate scratched areas extracted in the pre- processing phase. Two-phase preprocessing mechanism as this paper offers improves the sensitivity and accuracy of detecting scratches from previous study. Our method is applied to CHEMI MID HL HM sight- corrective dioptric lenses in experiment and it is verified that the proposed method is sufficiently effective by real optician's evaluation.