Premium
14.3: Reserved Highlight Region for HDR and Megacontrast Display Algorithms
Author(s) -
Daly Scott,
Meylan Laurence,
Kerofsky Louis
Publication year - 2010
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3500381
Subject(s) - brightness , luminance , specular reflection , computer science , high dynamic range , computer graphics (images) , range (aeronautics) , computer vision , artificial intelligence , dynamic range , algorithm , optics , engineering , physics , aerospace engineering
We discuss an algorithm that works with the concept of a reserved highlight region. It primarily addresses the problem of displaying legacy images calibrated for StandardDynamic Range displays onto displays having higher dynamic range, such as Megacontrast displays having standard brightness and bitdepth, as well as HighDynamic Range displays having increased brightness and bitdepth. The technique reserves headroom of the display range past maximum diffuse white for specular highlights and selfluminous objects. The paper discusses how to detect the specular highlights and light sources, how to construct a tonescale with reserved headroom, and different experiments conducted to learn how much of the dynamic range should be allocated for this upper luminance.