Correcting for Non-uniform Illumination when Photographing the Mural in the Royal Tomb of Amenophis III (II): Applying Mural Images

Abstract

The authors have been attempting to digitize murals at the royal tomb of Amenophis III. When photographing the murals, two strobe lights, each of which had an umbrella, were used to provide uniform illumination. Nonetheless, the illumination was still somewhat non-uniform. This non-uniform illumination was corrected by applying an illumination model, which was evaluated using images of the simulated mural with and without white patches. The illumination model was then extended to two light sources and applied to images of the actual mural. The corrected images were observed to be more uniformly illuminated. d

Correcting for Non-uniform Illumination when Photographing the Mural in the Royal Tomb of Amenophis III (II): Applying Mural Images

“…1062-3701/2013/57(2)/020501/7/$20.00 researchers in the world without going to the location. [1][2][3] Ninety-nine images (small-size images) of each position of the mural were taken with a 21 megapixel camera. These 99 small-size images were then stitched to produce a stitched image with approximately 500 megapixels, which is referred to as a middle-size image.…”

“…We assumed illumination from the strobe and umbrella as a point light source, and newly devised an illumination model based on the assumption. 1 We showed that non-uniform illumination could be corrected using the model, and further attempted a method for correcting non-uniform illumination only with a photographed image.…”