The invention concerns the compact representation of a reflectance spectrum of a material. For example, for in compression, identification and comparison of reflectance spectrum data of multiple materials. The compressed representation interpolating a spline curve to the reflectance spectrum data, the spline curve having a set of control points, a knot vector, and representing wavelength and reflectance as functions of an independent parameter (42). Then removing one or more knots from the knot vector that minimise a cost function in a parameter domain of the spline curve based on the wavelength function (44). Aspects of the invention include a method, software, a computer system and the compact representation itself.
History
Patent owner
NICTA
Registry office
USPO
Patent number
US20110191067
Start date
2008-01-01
Material type
patent
Language
eng
Notes
Also published as AU2008903138, EP2304601, CN102067110, AU2009260127, JP2011524578, WO/2009/152583, US8666700B2