不同光源及显色背景下红-黄色翡翠的质量分级. (Chinese)
In: Journal of Fuzhou University, Jg. 48 (2020-08-01), Heft 4, S. 539-544
academicJournal
Zugriff:
Based on ClE 1976 L* a* b* uniform color space, this program measured the L*, a*, b* values of red-yellow jadeite-jade samples under the standard. light sources D 65 , CWF, and A. And further, we calculated out the chroma value C*. Combining the data with statistical analysis, we proved that for red-yellow jadeite-jade, A standard light source is the best lighting source, while D 65 standard light source can be used as the best evaluation light source. We chose the N7 color card as the best color background, which owns the same gray level as the surface of the Standard illumination box. The results show that, under D05 standard. light source, red-yellow jadeite-jade on N7 color card can he divided into seven grades through K -means clustering analysis. [ABSTRACT FROM AUTHOR]
从色度学角度出发, 基于 CIE 1976 L* a* b* 均匀色空间, 在 D65 光源、CWF 光源和 A 光源照射下对红-黄色翡翠样本的 L*、a*、b* 值进行测量, 计算出彩度值 C*.并结合统计分析证明 A 光源为红-黄色翡翠的最佳照明光源, D 65 标准照明光源可作为红-黄色翡翠的最佳评价光源.选取与标准光源箱表面灰度相同的孟塞尔中性背景 N7 色卡为最佳显色背景.实验结果表明, 在 D 65 光源与 N7 色卡背景下, 通过 K-means 聚类分析, 最终可将翡翠红-黄色分为七级. [ABSTRACT FROM AUTHOR]
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Titel: |
不同光源及显色背景下红-黄色翡翠的质量分级. (Chinese)
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Autor/in / Beteiligte Person: | 商嫣然 ; 郭颖 ; 刘航瑜 ; 赵哲毅 ; 周朵特 |
Zeitschrift: | Journal of Fuzhou University, Jg. 48 (2020-08-01), Heft 4, S. 539-544 |
Veröffentlichung: | 2020 |
Medientyp: | academicJournal |
ISSN: | 1000-2243 (print) |
DOI: | 10.7631/issn.1000-2243.20149 |
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