Abstract
The result of a global illumination computation is the radiance seen through each pixel of the screen. Additionally, the depth of the visible points can also be fetched from the depth buffer. The radiance at a given wavelength is a floating point value, and at least three wavelengths are needed to render a color image. Radiance values may differ by many orders of magnitude, i.e. they have high dynamic range (HDR). However, the frame buffer containing the displayed image may store unsigned bytes, that can represent low dynamic range images (LDR). The conversion of HDR image values to displayable LDR values is called tone mapping [115].
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© 2008 Springer Nature Switzerland AG
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Szirmay-Kalos, L., Szécsi, L., Sbert, M. (2008). Postprocessing Effects. In: GPU-Based Techniques for Global Illumination Effects. Synthesis Lectures on Computer Graphics and Animation. Springer, Cham. https://doi.org/10.1007/978-3-031-79525-1_11
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DOI: https://doi.org/10.1007/978-3-031-79525-1_11
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-79524-4
Online ISBN: 978-3-031-79525-1
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