How can you have a scene linear reflectance greater than 100%?

Started 3 months ago | Questions thread
spider-mario
spider-mario Contributing Member • Posts: 958
Re: How can you have a scene linear reflectance greater than 100%?
4

J A C S wrote:

It might have something to do with diffuse vs. directed (specular) reflections.

Indeed. Those reference levels are for 18% and 100% diffuse reflections (from Lambertian surfaces). With such surfaces, as the name “diffuse” suggests, not all the light that lands on a given point from a given source is reflected in the direction of the camera. With specular reflections, it can be. See section 1.3 of BT.2390-9 for some discussion on this. This image from the first link is also a great illustration.

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