스마트폰을 활용한 반투명 재질의 광학적 특성 측정장치 개발

Translucent materials like human skin, milk and soap have the property which make incident light scattered. In order to measure the property of translucent material, dark room, light source, CCD sensor and data processing unit are required. These have large volume and complicated process. In this research, to reduce measurement volume we use smartphone flash light as a light source which is well calibrated. We set the additional lens in front of smartphone flash to concentrate light utilized as point light. And then we measure the point light on the target object varying exposure time to make HDRI(High Dynamic Range Image). HDRI is used to estimate target object`s reflectance property as applying Di-pole model. Finally We render object in computer display by applying reflectance property.