Preservation of edges: the mechanism for improvements in HDR imaging

John J. McCann; Alessandro Rizzi

doi:10.1117/12.810249

10 February 2009 Preservation of edges: the mechanism for improvements in HDR imaging

John J. McCann, Alessandro Rizzi

Proceedings Volume 7240, Human Vision and Electronic Imaging XIV; 72400U (2009) https://doi.org/10.1117/12.810249
Event: IS&T/SPIE Electronic Imaging, 2009, San Jose, California, United States

Abstract

There are a number of modern myths about High Dynamic Range (HDR) imaging. There have been claims that multiple-exposure techniques can accurately record scene luminances over a dynamic range of more than a million to one. There are assertions that human appearance tracks the same range. The most common myth is that HDR imaging accurately records and reproduces actual scene radiances. Regardless, there is no doubt that HDR imaging is superior to conventional imaging. We need to understand the basis of HDR image quality improvements. This paper shows that multiple exposure techniques can preserve spatial information, although they cannot record accurate scene luminances. Synthesizing HDR renditions from relative spatial records accounts for improved images.

Citation Download Citation

John J. McCann and Alessandro Rizzi "Preservation of edges: the mechanism for improvements in HDR imaging", Proc. SPIE 7240, Human Vision and Electronic Imaging XIV, 72400U (10 February 2009); https://doi.org/10.1117/12.810249

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