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您的检索式：作者名="Farmanullah Jan"
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| 1 | Robust iris biometric system for visible wavelength data显示文摘Commercial iris biometric systems exhibit good performance for near-infrared(NIR) images but poor performance for visible wavelength(VW) data.To address this problem,we propose an iris biometric system for VW data.The system includes localizing iris boundaries that use bimodal thresholding,Euclidean distance transform(EDT),and a circular pixel counting scheme(CPCS).Eyelids are localized using a parabolic pixel counting scheme(PPCS),and eyelashes,light reflections,and skin parts are adaptively detected using image intensity.Features are extracted using the log Gabor filter,and finally,matching is performed using Hamming distance(HD).The experimental results on UBIRIS and CASIA show that the proposed technique outperforms contemporary approaches. | Farmanullah Jan Imran Usman Shahid A. Khan | 2013 | Chinese Optics Letters2013，11，8： | 0 |
| 2 | Reliable iris localization using integral projection function and 2D-shape properties显示文摘Iris recognition technology recognizes a human based on his/her iris pattern.However,the accuracy of the iris recognition technology depends on accurate iris localization.Localizing a pupil region in the presence of other low-intensity regions,such as hairs,eyebrows,and eyelashes,is a challenging task.This study proposes an iris localization technique that includes a localizing pupillary boundary in a sub-image by using an integral projection function and two-dimensional shape properties(e.g.,area,geometry,and circularity).The limbic boundary is localized using gradients and an error distance transform,and the boundary is regularized with active contours.Experimental results obtained from public databases show the superiority of the proposed technique over contemporary methods. | Farmanullah Jan Imran Usman Shahrukh Agha | 2012 | Chinese Optics Letters2012，10，11： | 0 |
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