An apparatus and method is provided for identifying a diffusely-reflecting material, such as a textile fabric. A light source transmits radiation onto the unknown material, and a detector receives radiation diffusely reflected by the unknown material, and generates signals indicative of diffuse-reflection...http://www.google.fr/patents/US5475201?utm_source=gb-gplus-shareBrevet US5475201 - Method for identifying a diffusely-reflecting material
Method for identifying a diffusely-reflecting material
