Toshimitsu Kugimoto1, Shoji Yamamoto2*, Ryota Domon1, Kentaro Hikosaka3, Norimichi
Tsumura1
1 Graduate School of Advanced Integration Science, Chiba University, CHIBA, JAPAN,
2 Tokyo Metropolitan College of Industrial Technology, TOKYO, JAPAN,
3 Nikon Corporation, TOKYO, JAPAN.
Optical Review, Volume 23, Issue 3, pp. 549–558 (2016).
Abstract
In this paper, we consider the use of an environment map as a photographic
support tool for understanding the condition of surrounding light. It is
well known that an environment map should be captured at a position directly
above the target object. However, this is not always possible. Therefore,
we developed a practical transformation method for an environment map that
was captured from a different position. The proposed method is effective
in an indoor scene where the direction of a light source differs significantly
depending on the captured position. A mapping for a rectangular parallelepiped
(cuboid), and perspective information estimated from a corner position
of a room is used to calculate the transformed environment map at the target
position. The method was applied to the transformation for an actual room,
and it was verified that the transformed environment map almost corresponds
to the ground truth of the environment map captured at the target position.
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