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Proceedings Paper

Diamond color measurement instrument based on image processing
Author(s): H. Takahashi; S. Mandal; M. Toosi; J. Zeng; W. Wang
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Paper Abstract

Gemological Institute of America (GIA) has developed a diamond color measurement instrument that can provide accurate and reproducible color measurement results. The instrument uses uniform illumination by a daylight-approximating light source; observations from a high-resolution color-camera with nearly zero-distortion bi-telecentric lens, and image processing to calculate color parameters of diamonds. Experiments show the instrument can provide reproducible color measurement results and also identify subtle color differences in diamonds with high sensitivity. The experimental setup of the prototype instrument and the image processing method for calculating diamond color parameters are presented in this report.

Paper Details

Date Published: 14 September 2016
PDF: 6 pages
Proc. SPIE 9970, Optics and Photonics for Information Processing X, 997015 (14 September 2016); doi: 10.1117/12.2235801
Show Author Affiliations
H. Takahashi, Gemological Institute of America (United States)
S. Mandal, Gemological Institute of America (United States)
M. Toosi, Gemological Institute of America (United States)
J. Zeng, Gemological Institute of America (United States)
W. Wang, Gemological Institute of America (United States)


Published in SPIE Proceedings Vol. 9970:
Optics and Photonics for Information Processing X
Khan M. Iftekharuddin; Abdul A. S. Awwal; Mireya García Vázquez; Andrés Márquez; Mohammad A. Matin, Editor(s)

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