Windows的hdr发灰这个事情 有没有可能一部分原因是看习惯了过饱和的sdr画面？

Windows 11 has made strides in streamlining the HDR experience, finally allowing for casual workstations where HDR is always enabled throughout the desktop. This is made possible by emulating an SDR color space within the native HDR10 composition space so that both types of content can coexist.

However, the specifications for "SDR" can sometimes be ambiguous since there are multiple standards that depend on viewing parameters.

The rule of thumb is:

Gamma 2.4 — Rec.709 reference. Dark room viewing (5 lux). Home theater use.
Gamma 2.2 — Pseudo-standard in uncontrolled lighting (>50 lux). Computer use.
As of version 22H2, Windows 11 does not allow us to pick which tone curve to use for SDR — in fact it uses neither of the above. Instead, Windows 11 uses what's called the piecewise sRGB transfer function, originally intended for computer/web use. This curve is technically the tone response that gamma 2.2 approximates, but for various reasons it wasn't commonly used as an actual display EOTF. Gamma 2.2 took over as the pseudo-standard, and almost every computer monitor still uses it to this day.

Because it's so prolific, almost all web content and computer games are color graded using a gamma-2.2 outputting monitor, intentionally or not. For Microsoft to decide using piecewise sRGB as the virtual SDR curve was a mistake; it forcibly renders almost all apps and web content to look incorrect, some more than others.
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