title: Optical filter for highlighting spectral features part I: design and development of the filter for discrimination of human skin with and without an application of cosmetic foundation.
abstract: Light reflected from an object's surface contains much information about its physical and chemical properties. Changes in the physical properties of an object are barely detectable in spectra. Conventional trichromatic systems, on the other hand, cannot detect most spectral features because spectral information is compressively represented as trichromatic signals forming a three-dimensional subspace. We propose a method for designing a filter that optically modulates a camera's spectral sensitivity to find an alternative subspace highlighting an object's spectral features more effectively than the original trichromatic space. We designed and developed a filter that detects cosmetic foundations on human face. Results confirmed that the filter can visualize and nondestructively inspect the foundation distribution.
authors: Department of Computer Science and Engineering, Toyohashi University of Technology, Toyohashi, Aichi, Japan. nishino06@vpac.cs.tut.ac.jp
authors: Ken
authors: K
authors: Nishino
authors: Mutsuko
authors: M
authors: Nakamura
authors: Masayuki
authors: M
authors: Matsumoto
authors: Osamu
authors: O
authors: Tanno
authors: Shigeki
authors: S
authors: Nakauchi
mesh_terms: D003116:Color; D003124:Colorimetry / Q000379:methods*; D003358:Cosmetics / Q000032:analysis*; D046169:Dermoscopy / Q000379:methods*; D005145:Face; D005374:Filtration / Q000379:methods*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D010781:Photography / Q000379:methods*; D012680:Sensitivity and Specificity; D012867:Skin / Q000737:chemistry*
chemical_list: D003358:Cosmetics