Abstract
Objects of which color we recognize gold/silver can only be measured as yellow/gray by using a colorimeter. We focused on why we can distinguish gold/silver color as a different category from yellow/gray. We also focused on why we can distinguish silver color as a different category from a simple mirror. We have performed following experiments : evaluation of dependence of gold/silver color recognition to lighting conditions, evaluation of recognition transition from mirror to silver/gold when applying various disturbance or distortion on a flat mirror surface. Our experimental results suggested that frosted or deformed surface reflection of ambience was necessary for gold/silver color recognition.
