Correcting for non-uniform illumination when photographing the mural in the royal tomb of Amenophis Ⅲ (Ⅲ) Correcting mural images

摘要

We have been attempting to digitize murals at the royal tomb of Amenophis Ⅲ. When photographing the murals, two strobe lights with an umbrella were used to provide uniform illumination. Nonetheless, the illumination was still somewhat non-uniform. We corrected for this non-uniform illumination by applying an illumination model, which we evaluated using images with white patches and images of the model mural 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.