High Dynamic Range Imaging for Archaeological Recording |
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Authors: | David Wheatley |
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Institution: | (1) Archaeology, Faculty of Arts and Humanities, University of Southampton, Southampton, SO15 1BF, UK |
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Abstract: | This paper notes the adoption of digital photography as a primary recording means within archaeology, and reviews some issues
and problems that this presents. Particular attention is given to the problems of recording high-contrast scenes in archaeology
and high dynamic range imaging using multiple exposures is suggested as a means of providing an archive of high-contrast scenes
that can later be tone-mapped to provide a variety of visualisations. Exposure fusion is also considered, although it is noted
that this has some disadvantages. Three case studies are then presented: (1) a very high-contrast photograph taken from within
a rock-cut tomb at Cala Morell, Menorca, (2) an archaeological test pitting exercise requiring rapid acquisition of photographic
records in challenging circumstances and (3) legacy material consisting of three differently exposed colour positive (slide)
photographs of the same scene. In each case, high dynamic range (HDR) methods are shown to significantly aid the generation
of a high-quality illustrative record photograph, and it is concluded that HDR imaging could serve an effective role in archaeological
photographic recording, although there remain problems of archiving and distributing HDR radiance map data. |
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Keywords: | |
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