9 February 1989 Hexagonal Image Sampling: A Practical Proposition
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Proceedings Volume 1008, Expert Robots for Industrial Use; (1989) https://doi.org/10.1117/12.949123
Event: 1988 Cambridge Symposium on Advances in Intelligent Robotics Systems, 1988, Boston, MA, United States
Abstract
A case is made for the use of regular hexagonal sampling systems in robot vision applications. With such a sampling technique, neighbouring pixels reside in equidistant shells surrounding the central pixel and this leads to the simpler design and faster processing of local operators and to a reduced image storage requirement. Connectivity within the image is easily defined and the aliasing associated with vertical lines in the hexagonal system is not a problem for robot vision. With modern processors only a minimal time penalty is incurred in reporting results in a rectangular coordinate system, and a comparison between equivalent processing times for hexagonal and rectangular systems implemented on a popular processor has shown savings in excess of 40% for hexagonal edge detection operators. Little modification is required to TV frame grabber hardware to enable hexagonal digitisation.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard C. Staunton, Richard C. Staunton, } "Hexagonal Image Sampling: A Practical Proposition", Proc. SPIE 1008, Expert Robots for Industrial Use, (9 February 1989); doi: 10.1117/12.949123; https://doi.org/10.1117/12.949123
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