DaVinci Resolve 17 Gamut Intermediate, Apuntes de Fotografía

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Wide Gamut Intermediate

DaVinci

Resolve

November 2020

Leading the Creative Video Revolution

English

Contents

• DaVinci Wide Gamut Intermediate
• Revision History
• Summary
• DaVinci Wide Gamut
• DaVinci WG Primaries and White Point
• DaVinci Intermediate (OETF)
• Parameters
• Forward OETF
• Inverse OETF
• Mapping Values
• Plots

DaVinci WG Primaries and White Point

DaVinci Wide Gamut is defined by the following CIE 1931 xy chromaticity coordinates:

x y red 0.8000^ 0. green 0.1618 0. blue 0.0790 -0. white 0.3127 0.

The matrices below convert linear DaVinci Wide Gamut RGB data to/from CIE 1931 XYZ:

DaVinci WG RGB -> XYZ matrix 0.70062239 0.14877482 0. 0.27411851 0.87363190 -0. -0.09896291 -0.13789533 1.

XYZ -> DaVinci WG RGB matrix 1.51667204 -0.28147805 -0. -0.46491710 1.25142378 0. 0.06484905 0.10913934 0.

DaVinci Intermediate (OETF)

DaVinci Intermediate encodes linear light (ie. 18% grey is represented by 0.18) and is

defined by the parameters below.

Parameters

Parameter Value DI_A 0. DI_B 7. DI_C 0. DI_M 10. DI_LIN_CUT 0. DI_LOG_CUT 0.

Linear light values below DI_LIN_CUT are encoded linearly with a gradient of DI_M.

For a linear light value (L) and encoded value (V), and given the above parameters,

DaVinci Intermediate is encoded / decoded using the following equations.

Forward OETF

V = (log2(L + DI_A) + DI_B)DI_C for L > DI_LIN_CUT V = LDI_M for L < = DI_LIN_CUT

Inverse OETF

L = pow(2.0, (V / DI_C) - DI_B)-DI_A for V> DI_LOG_CUT L = V/DI_M for V < = DI_LOG_CUT

Mapping Values

DaVinci Intermediate encodes > 9.1 stops above 18% grey.

Middle (18%) grey is mapped to 0.336043.

Input Nits Input Value DaVinci Intermediate Value -1.0 -0.01 -0. 0.0 0.0 0. 18.0 0.18 0. 100.0 1.0 0. 1000.0 10.0 0. 4000.0 40.0 0. 10000.0 100.0 1.

Plots