diff options
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diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst index 7c8f602045..4d2be6ad66 100644 --- a/DOCS/man/options.rst +++ b/DOCS/man/options.rst @@ -4645,13 +4645,27 @@ The following video options are currently all specific to ``--vo=opengl`` and display. Valid values are: clip - Hard-clip any out-of-range values. + Hard-clip any out-of-range values. Use this when you care about + perfect color accuracy for in-range values at the cost of completely + distorting out-of-range values. Not generally recommended. + mobius + Generalization of Reinhard to a Möbius transform with linear section. + Smoothly maps out-of-range values while retaining contrast and colors + for in-range material as much as possible. Use this when you care about + color accuracy more than detail preservation. This is somewhere in + between ``clip`` and ``reinhard``, depending on the value of + ``--tone-mapping-param``. (default) reinhard Reinhard tone mapping algorithm. Very simple continuous curve. - Preserves dynamic range and peak but uses nonlinear contrast. + Preserves overall image brightness but uses nonlinear contrast, which + results in flattening of details and degradation in color accuracy. hable - Similar to ``reinhard`` but preserves dark contrast better (slightly - sigmoidal). Developed by John Hable for use in video games. (default) + Similar to ``reinhard`` but preserves both dark and bright details + better (slightly sigmoidal), at the cost of slightly darkening + everything. Developed by John Hable for use in video games. Use this + when you care about detail preservation more than color/brightness + accuracy. This is roughly equivalent to + ``--hdr-tone-mapping=reinhard --tone-mapping-param=0.24``. gamma Fits a logarithmic transfer between the tone curves. linear @@ -4662,6 +4676,12 @@ The following video options are currently all specific to ``--vo=opengl`` and Set tone mapping parameters. Ignored if the tone mapping algorithm is not tunable. This affects the following tone mapping algorithms: + mobius + Specifies the transition point from linear to mobius transform. Every + value below this point is guaranteed to be mapped 1:1. The higher the + value, the more accurate the result will be, at the cost of losing + bright details. Defaults to 0.3, which due to the steep initial slope + still preserves in-range colors fairly accurately. reinhard Specifies the local contrast coefficient at the display peak. Defaults to 0.5, which means that in-gamut values will be about half as bright |