SpectrumTransferFunctionExpr

Field

Type

Description

source

SpectrumExpression

target_transfer

SpectrumTransferFunction

name

string

scene_referred

bool

Controls BT.709 transfer function variant: false (default) = BT.1886 display-referred (gamma 2.4), matching ffmpeg/zscale. Correct for content destined for modern flat-panel displays. true = piecewise BT.709 OETF (scene-referred, with linear toe). Correct for camera encoding / scene-linear grading workflows. Only affects BT.709 and BT.2020 transfer functions.