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Iris normalisation and feature extraction are two last stages of iris processing in iris recognition systems. In normalisation step, the segmented iris disk is transformed to a strip. The most iris recognition systems are employed rectangular strip normalisation. In this paper, the problems such as repeating or losing information in rectangular normalisation method are investigated. The new trapezium normalisation also has been developed to enhance the normalisation stage. The 2D Gabor filter is employed to extract the iris features from the trapezium normalised image.
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