Barten Ramp

輝度差弁別閾は、ある輝度の光に対して、それと輝度の違いを感じられる最小の輝度差のことである。
例えば、Barten Rampによれば、10000nitのとき、0.39%の輝度差、つまり39nitの差を区別することができる。
この輝度差弁別閾に現れる人間の輝度知覚特性の非線形性は、SMPTE ST 2084のPQカーブ設定の基礎となった。
以下はBT.2246-7 FIGURE 33のパラメータに基づく、0.001nitから10000nitまでの輝度対輝度差弁別閾の一覧である。
Barten Ramp.csv
 "Luminance(cd/m^2)","BT.2246-7 FIGURE 33 Barten Ramp Minimum Contrast Step(percent)"
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