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So I understand third technology is the future...?Date: 5/25/2009 4:27:26 AM
Author: Serg
re:So I think we are pretty much in understanding at present that human intervention is needed when grading the color [and clarity] of Diamonds...
Diagem,
We near the point where human and machine accuracies for grading color are similar. ( Fluorescence is problem for both approach, because clear rules for grading is absent)
Evolution line for color grading : ''Bi-line or Tri-line colorimeters'', ''transmission absorption spectrum'', ''Absorption spectrum and exact 3d models''.
First two technology based on Statistic and can not account color pattern in diamond, accuaracy depends from positions sample and difference between theoretical or real 3d models had been used for Statistic data base and 3D model object what you want grade .
Third color grading technology less depends from Statistic databased but need much more complex model to model human vision.
Third technology could be ready for industry use in few years.
To tackle fluorescence problem you just need agreed rules? Like for example translating and combining intensity and color of fluo. to spectral absorption?
What about shapes, square vs. elongated?
Brn-grey hues will be based on human vision model?
Is third technology based on face-up only or is body color part of the equation?