October 2018
Beginner
734 pages
22h 15m
English
Content preview from Fundamentals of Computer Graphics, 4th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 21
Tone Reproduction
Erik Reinhard
As discussed in Chapter 20, the human visual system adapts to a wide range of viewing conditions. Under normal viewing, we may discern a range of around 4 to 5 log units of illumination, i.e., the ratio between brightest and darkest areas where we can see detail may be as large as 100,000 : 1. Through adaptation processes, we may adapt to an even larger range of illumination. We call images that are matched to the capabilities of the human visual system high dynamic range.
Visual simulations routinely produce images with a high dynamic range (Ward Larson & Shakespeare, 1998). Recent developments in image-capturing techniques allow multiple exposures to be aligned and recombined into a single high dynamic ...
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