Coordinate system for hexagonal pixels
Wesley E. Snyder, Hairong Qi, William A. Sander · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1999
A coordinate system is described which provides a natural means for representing hexagonally-organized pixels. The coordinate system has the unusual property that its basis vectors are not orthogonal. Vector-space properties and operations are described in this coordinate system, and shown to be straightforward computations. Some image processing algorithms, including calculations of image gradients and variable-conductance diffusion, are expressed and analyzed.