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Optimal illumination for local contrast enhancement based on the human visual system.

Authors
Type
Published Article
Journal
Journal of Biomedical Optics
1560-2281
Publisher
SPIE - International Society for Optical Engineering
Publication Date
Volume
20
Issue
1
Pages
15005–15005
Identifiers
DOI: 10.1117/1.JBO.20.1.015005
PMID: 25625773
Source
Medline

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.

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