PQ
Perceptual Quantizer (PQ), also known as SMPTE ST 2084 transfer function, used for High Dynamic Range (HDR) displays.
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Definition
- Type: Field
- Namespace: UnityEngine
- Assembly: UnityEngine.CoreModule
PQ = 2
Remarks
The Perceptual Quantizer (PQ) transfer function is a newer version of a traditional gamma curve used in Standard Dynamic Range (SDR) displays.
Unlike the gamma curve, which is a simple power-law function, the PQ curve is designed to better align with the non-linear way the human eye perceives luminance.
The function is designed for High Dynamic Range (HDR) displays, enabling a more accurate and perceptually uniform representation of brightness across a wide range of luminance levels, up to 10,000 nits.
For more information, refer to SMPTE reference document for ST 2084 and Dolby's Reference Level Guidelines For PQ (BT.2100).