Wide Color Gamut SET EXPO 2016 31 AUGUST 2016 Eliésio Silva Júnior Reseller Account Manager E/
[email protected] T/ +55 11 3530-8940 M/ +55 21 9 7242-4211 tek.com Anatomy Human Vision CIE Chart Color Gamuts Wide Color Gamut Gamma and High Dynamic Range 2 Basic Anatomy - Human vision system PHYSICAL PART/ELEMENTS • Eye, Lens and Retina ▪ Rods ▫ Sensitive to Blue-green light ▫ Used for vision under dark-dim conditions. ▪ Cones ▫ 3 Types of Cones Sensitive to either long wavelengths of light (red light) medium wavelengths of light (green light) short wavelengths of light (blue light) ◦ Optic nerve http://webvision.med.utah.edu/index.html 3 Color Model – CIE color spaces NTSC (1953) BT709/sRGB BT2020 ~SMPTE C D65 white BT2020 NTSC (1953) Black BT709/sRGB (70% NTSC) White ~SMPTE C D65 white CIE-1931 chart CIE-1976 chart (More perceptually uniform than CIE-1931) • CIE 1931 XYZ color space ◦ Still foundation of most color models • Trichromatic stimulus (color value) • Lightness decreases towards not shown third dimmension • Saturation increases towards edges 4 ITU 601-7 & 709-5 Chromaticity ITU-R BT 601-7 601-7 525 CIE x CIE y Red 0.630 0.340 Green 0.310 0.595 Blue 0.155 0.070 White 0.3127 0.3290 ITU-R BT 709-5 709-5/601 625 CIE x CIE y Red 0.640 0.330 Green 0.300 0.600 Blue 0.150 0.060 White 0.3127 0.3290 31 AUGUST 2016 5 Wider Color - Chromaticity ITU-R BT 2020 CIE x CIE y Red 0.708 0.292 Green 0.170 0.797 Blue 0.131 0.046 White 0.31272 0.32903 ITU-R BT 709-5 709-5 CIE x CIE y Red 0.640 0.330 Green 0.300 0.600 Blue 0.150 0.060 White 0.3127 0.3290