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Volume 9 Issue 2
Jun.  2007
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PAN Feng, REN Jin. Quantitative Appraisal for Colour of Ruby[J]. Journal of Gems & Gemmology, 2007, 9(2): 25-28.
Citation: PAN Feng, REN Jin. Quantitative Appraisal for Colour of Ruby[J]. Journal of Gems & Gemmology, 2007, 9(2): 25-28.
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Quantitative Appraisal for Colour of Ruby

  • 1. Beijing Institute of Clothing Technology, Beijing 100029, China;

  • 2. China University of Geosciences, Beijing 100083, China

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  • Received Date: April 05, 2007
    Graphical Abstract
    • Abstract
  • On the basis of the colorimetry and Photoshop image software, the appraisal for the colours of ruby samples is studied by a quantitative method in the paper.The photographs of samples from light red to dark red and standard colours of ruby samples in GemSet are input into the computer by using a digital camera or UMAX scanner,which are analysed through the parameter values of hue (H), saturation (S) and brightness (B) in Photoshop software. The values are used to grade colour, saturaion, brightness and an integrative criterion for quantitative appraisal of colour of ruby is established. The results show that the method is feasible and practical.
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    • References (7)
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