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.. -*- coding: utf-8; mode: rst -*-
***************************************
Detailed Transfer Function Descriptions
***************************************
.. _xf-smpte-2084:
Transfer Function SMPTE 2084 (V4L2_XFER_FUNC_SMPTE2084)
=======================================================
The :ref:`smpte2084` standard defines the transfer function used by
High Dynamic Range content.
Constants:
m1 = (2610 / 4096) / 4
m2 = (2523 / 4096) * 128
c1 = 3424 / 4096
c2 = (2413 / 4096) * 32
c3 = (2392 / 4096) * 32
Transfer function:
L' = ((c1 + c2 * L\ :sup:`m1`) / (1 + c3 * L\ :sup:`m1`))\ :sup:`m2`
Inverse Transfer function:
L = (max(L':sup:`1/m2` - c1, 0) / (c2 - c3 *
L'\ :sup:`1/m2`))\ :sup:`1/m1`
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