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. 02, 2004
Filed:
Apr. 07, 2000
Lei Zheng, Singapore, SG;
Jian Kang Wu, Singapore, SG;
Kent Ridge Digital Labs, Singapore, SG;
Abstract
A lighting normalisation method, apparatus and computer program product are disclosed. First, lighting parameters are estimated ( ) optimally based on a shading model. After applying segmentation ( ), each generated region is assigned are liability based on the stochastic model of that object. This reliability is used to distinguish ( ) shadow from object detail. Regions are then further split and merged ( ) according to these reliabilities. Finally, the lighting parameters of these regions are calculated and the object is reconstructed ( ) to a normalised lighting condition. This technique can be used for an object recognition system, i.e., face recognition applications, as well as for image enhancement, image retrieval, machine vision and related regions.