Chroma value is changing with lighting conditions and can not be easily transformed into a certain color grade.
Color grade borderlines are also changed with hue.
C - Chroma, RC - relative contrast
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Office light, black background |
Dialite light |
Dialite light
Tilted 15° up |
| Before color optimization:
4,02 ct
Cr = 36° P = 43°
Office light: C = 20.24, RC = 0.64
Dialite light: C = 32.51, RC = 0.21
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| After color optimization:
5,21 ct
C = 48° P = 47.5°
Office light: C = 28.90,
RC = 0.54
Dialite light: C = 31.94, RC = 0.18 |
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Then an expert works with optimization results for each shape. It different lighting conditions one can compare stones before and after optimization:
- by photorealistic images
- by color metrics
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