Diamond color measurement instrument based on image processing
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-09-14 |
| Journal | Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE |
| Authors | Hiroshi Takahashi, Srimanta Mandal, Mohammad Mahdi Alizadeh Toosi, Junjie Zeng, WenāJwu Wang |
| Institutions | Gemological Institute of America |
Abstract
Section titled āAbstractāGemological 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.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 1983 - Gemmological instruments: their use and principles of operation
- 2010 - PITFALLS IN AUTOMATIC DIAMOND COLOUR GRADING
- 2013 - OPTICAL DEFECTS IN DIAMOND: A QUICK REFERNCE CHART