厚みのある合成樹脂製品向けの人工物メトリクスの研究（赤外線の反射と吸収の利用）

Abstract

Copied molded synthetic resin products have been distributed in the market while manufacturer provide real products to customers. They not only violate manufacturer’s intellectual property right but also cause mental and monetary damages to customers. In this paper, we propose anti-counterfeiting and authenticity verification technique (called artifact metrics) for resin-made molded products. In our technique, each product has unique optical characteristic information formed by “liquid turbulence” which is caused when two types of liquid resin with different optical features are poured into a mold. Liquid turbulence makes random marble-like patterns (or characteristic information) all over the product. This information can be shot efficiently by using infrared light source and infrared camera. The appearance of the product is not affected by marble-like patterns as they can be covered by the paint which can transmit infrared light. In our experiment, we confirmed these results: (1) Covered marble-like patterns could not observed by naked eyes, (2) Characteristic information could be extracted from 50samples covered by black-colored infrared light transmission paint, and (3) extracted characteristic information by infrared camera differed from each sample.