CASE, K., 1995. Shadow-scanned human representations for car seat design. IN: Mumford, A. (ed.) Proceedings of the Thirteenth Annual Eurographics UK Conference, Loughborough University of Technology, Loughborough, UK, pp. 249 - 254.
Modelling of the human body has a long history as an essential component of
computer aided design systems which provide ergonomic analysis of workplaces and
equipment. A current Brite-Euram project is concerned with life-cycle aspects of car
seating from design through manufacturing and eventual re-cycling. Loughborough
University is responsible for driver comfort assessment which is being carried out
through road and laboratory trials, the results of which are to be incorporated within
the SAMMIE computer aided ergonomics design system.
The human body is infinitely variable in shape and dimension and this leads to
particular difficulty in generating initial shape representations and subsequently
manipulating these to represent individuals or general populations. This paper is
principally concerned with a method for capturing shape information and transforming
it into a CAD surface representation. The capture method uses a shadow scanning
technique where the human body can be scanned in a matter of minutes and ordered
coordinate information provided. This information has been processed for input into
the DUCT surface modeller where some data reduction can take place before being
output in the form of IGES B-Spline surfaces. These surfaces are then processed into a
quadrilateral mesh representation that can be handled by the PHIGS functionality
implemented within SAMMIE.