球面六角形画像ピラミッドを用いた球面投影による全方位画像処理

抄録

Pyramid- and tree-type structures manipulate hierarchical and multi-resolution representations of data and are used in many image processing applications. However, it has been thought that it is difficult to deal with a spherical image by use of a pyramidal data structure. Because, connectedness of such structure is far weaker than a normal square tessellation.
In this paper, we propose a new data structure for spherical image processing on an omni-directional view that is a spherical hexagonal image pyramid. It is composed of hexagonal pixels on a regular polyhedron. Using this data structure, we can represent an omni-directional view in a complete spherical image. And we performed an experiment to extract great circles in a spherical image and to estimate coordinate systems using vanishing points as one of omni-directional image processing applications.