| Issue |
MATEC Web Conf.
Volume 82, 2016
2016 International Conference on Design, Mechanical and Material Engineering (D2ME 2016)
|
|
|---|---|---|
| Article Number | 03002 | |
| Number of page(s) | 6 | |
| Section | Chapter 3: Design Engineering | |
| DOI | https://doi.org/10.1051/matecconf/20168203002 | |
| Published online | 31 October 2016 | |
The Research on Color Grading of Green Jade Images Based on HSL Chromaticity Analysis
Gemmological Institute, China University of Geosciences, Wuhan, 430074, China
a Corresponding author: lilili29@sina.com
This study aims to establish a simple and convenient method suitable for the market to grade the jade colors. Based on the HSL color model and with the assistance of the HSL analysis on green jade images acquired by camera flashlights, this study obtains the following six kinds of jade colors: melon green, emerald green, yellow green, bean green, light bean green, and light green, based on which the law governing the values and the value range can be determined, and the respective HSL value ranges ,together with their threshold values, for the seven green jades can be finally found, thus laying an important foundation for further researches on computer-based quick grading. It is also hoped that this method will be widely applied and promoted in the marketplace and realizes our ultimate goal of setting guidelines to commercial jade prices.
Key words: Green jade / color evaluation / image analysis method / HSL value
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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