title: Optimal illumination for local contrast enhancement based on the human visual system.
abstract: The observed color of an object is influenced by the spectral distribution of an illuminant impinging upon it. Here we explored a method to obtain optimal illumination spectra for local contrast enhancement based on human vision. First, multispectral imaging was used to measure the spectral reflectance of the sample and color segmentation was used to extract its color features. Then we obtained the target-specific optimal illumination by maximizing the color differences of mutual colors in our sample tissue. To verify the effectiveness of this method, simulated images under the optimized illumination were compared to illumination with the standard illuminant D65 and a cool white light-emitting diode (5500 K). Results showed that the sample under the optimized illumination had a better perceptual color contrast.
authors.affiliation: Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, 38 Zheda Road, Hang Zhou 310027, ChinabEindhoven University of Technology, Human Technology Interaction Group, School of Industrial Engineering.
authors.forename: Huihui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Eindhoven University of Technology, Human Technology Interaction Group, School of Industrial Engineering and Innovation Sciences, Den Dolech 2, Eindhoven 5600 MB, the Netherlands.
authors.forename: Raymond H
authors.initials: RH
authors.lastname: Cuijpers
authors.affiliation: Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, 38 Zheda Road, Hang Zhou 310027, ChinacUniversity of Leeds, School of Design, Woodhouse Lane, Leeds LS2 9JT, United Kingdom.
authors.forename: Ming Ronnier
authors.initials: MR
authors.lastname: Luo
authors.affiliation: Eindhoven University of Technology, Human Technology Interaction Group, School of Industrial Engineering and Innovation Sciences, Den Dolech 2, Eindhoven 5600 MB, the Netherlands.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Heynderickx
authors.affiliation: Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, 38 Zheda Road, Hang Zhou 310027, China.
authors.forename: Zhenrong
authors.initials: Z
authors.lastname: Zheng
mesh_terms: D000818:Animals; D003116:Color; D006321:Heart / Q000033:anatomy & histology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008029:Lighting / Q000379:methods*; D015203:Reproducibility of Results; D013057:Spectrum Analysis / Q000379:methods*; D013552:Swine