09linear, gamma, log

Figure 9.1. Comparison of RAW data, a log encoded image, and the frame in Rec709.
Figure 9.1. Comparison of RAW data, a log encoded image, and the frame in Rec709.

DYNAMIC RANGE

Brightness range, dynamic range, and luminance range are terms for the same concept: how much variation there is in the luminance levels of a scene and then how accurately the imaging system is able to reproduce those levels. Any scene we look at has a specific brightness range, which is a result of the combination of how much light is falling on the scene and how reflective the objects are. Also, some things in the scene don’t reflect light so much as they generate their own light: lamps, a fire, windows, the sky, etc. The ...

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