METHOD AND DEVICE FOR EXTRACTING IRIS IMAGE IMAGE UNDER CONDITION OF NON-UNIFORM ILLUMINATION

Disclosed are a method and device for extracting an iris image under the condition of non-uniform illumination. The method comprises: filtering a non-uniform illumination intensity component from an image containing an iris image (S102); calculating a colour difference in the filtered image (S104);...

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Bibliographic Details
Main Authors SUN, XIANJUN, DONG, JIPING, XIA, PENG
Format Patent
LanguageChinese
English
French
Published 16.07.2015
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:Disclosed are a method and device for extracting an iris image under the condition of non-uniform illumination. The method comprises: filtering a non-uniform illumination intensity component from an image containing an iris image (S102); calculating a colour difference in the filtered image (S104); and conducting iris image extraction according to the colour difference (S106). In the embodiments, by filtering a non-uniform illumination intensity component, the influence of the condition of non-uniform illumination on the iris image extraction can be avoided. L'invention concerne une méthode et un dispositif d'extraction d'image d'iris dans une condition d'éclairage non uniforme. La méthode comprend les étapes suivantes : filtrer une composante d'intensité d'éclairage non uniforme à partir d'une image contenant une image d'iris (S102); calculer une différence de couleur dans l'image filtrée (S104); et effectuer une extraction d'image d'iris en fonction de la différence de couleur (S106). Dans les modes de réal
Bibliography:Application Number: WO2015CN70058