The Radiance RGBE Format

A main advantage of the Radiance Synthetic Imaging System is the high dynamic range provided by its RGBE image file format. It allows for storing real-world luminance and illuminance values across 77 orders of magnitude with 1% accuracy.

Images can contain either scalar data (which lacks the high dynamic range), or luminance/illuminance values. It is important to distinguish between those two formats because scalar images are not appropriate for analysis as they lack the real-world high dynamic range values.


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