The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 2010
Filed:
Jul. 12, 2005
Stephen James Hardy, West Pymble, AU;
Stephen James Hardy, West Pymble, AU;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method () is disclosed of performing chromatic adaptation. The method () predicts final colour data viewed under a final illuminant from initial colour data viewed under a initial illuminant. The method () receives () the initial and final illuminant spectra and spectral sensitivity functions of the colors between which chromatic adaptation is to be performed. A linear chromatic adaptation transform is then determined () for transforming the initial color data to the final color data. The linear chromatic adaptation transform is determined () by minimising the residual error between color data predicted using the chromatic adaptation transform and the final color data. Different spectral bands of the illuminant spectra and the spectral sensitivity functions are weighted based on the contribution made by each spectral band to a predefined function. The method () then applies () the linear chromatic adaptation transform to the initial color data.