Patent
Digital processing of an iris image
Lionel Résidence Les Muguets Martin,Guillaume Résidence Valbonnette A Petitjean,Ketchantang William +2 more
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TLDR
In this article, a contrast enhancement comprising a linear piecewise stretching is enhanced to adjust histogram of grey levels of the image within a bounded interval, defined by the minimum and maximum intensity values desired in the final image.Abstract:
The method involves filtering an image with a structuring element corresponding to a disk with a diameter approximately corresponding to a thickness of an eyelash. A structuring element corresponding to a disk having a radius corresponding to a minimum expected radius of a pupil in the image is opened. A contrast enhancement comprising a linear piecewise stretching is enhanced to adjust histogram of grey levels of the image within a bounded interval, defined by the minimum and maximum intensity values desired in the final image. An independent claim is also included for a system for recognizing an iris of an eye.read more
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Patent
Long distance multimodal biometric system and method
Marc D. Friedman,Nicholas A. Accomando,Faisal Bashir,Pablo Casaverde,Stephen F. Daly,David J. Hitchcock,Romina Marie Johnson Jose,Tim McNerney,David Muller,Vladimir Ruzhitsky,Yasunari Tosa,David Usher +11 more
TL;DR: In this paper, a system for multimodal biometric identification has a first imaging system that detects one or more subjects in a first field of view, including a targeted subject having a first biometric characteristic and a second biometric feature.
Patent
Multimodal ocular biometric system and methods
TL;DR: In this paper, a pupil segmentation algorithm for determining a pupil image in the captured image, iris segmentation for determining an iris image, an eyelid/eyelash segmentation, and an algorithm for measuring the focus on the iris.
Patent
Multimodal ocular biometric system
Marc D. Friedman,Pablo Casaverde,Don Yansen,Tim McNerney,Yasunari Tosa,David Usher,Nicholas A. Accomando,David Muller,Gregory Lee Heacock,John Marshall +9 more
TL;DR: In this paper, a multimodal biometric identification system was proposed to capture and process images of both the iris and the retina for biometric recognition. But the system is limited to using data from only the retina from a single eye.
Patent
Iris data extraction
TL;DR: In this article, a nonparametric thresholding method for iris data for biometric identification is proposed. But it does not require classifying pixels as edge or non-edge pixels.
Patent
Pupil detection device
TL;DR: In this article, an active light source, an image sensor and a processing unit were used to track the pupil in a pupil tracking system using active light sources and an active image sensor.
References
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Near-infrared method and system for use in face detection
TL;DR: In this paper, a method and system for use in detecting a face of a person includes providing image data representative of reflected light of a scene in at least one bandwidth within a reflected infrared radiation range.
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TL;DR: In this article, a method of processing an image including the steps of locating within the image the position of at least one predetermined feature, extracting from the image data representing each feature, and calculating for each feature a feature vector representing the position in an N-dimensional space, such space being defined by a plurality of reference vectors each of which is an eigenvector of a training set of like features in which the image of each feature is modified to normalize the shape of the feature, which step is carried out before calculating the corresponding feature vector.
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Evaluation of the definition of an eye iris image
TL;DR: In this article, a method and a system for evaluating the definition of the image of an eye iris or the like, including approximately localizing the pupil in the image, defining, from the approximate position of the pupil, an examination window centered on this position, and applying a gradient accumulation operation to the luminance values of the pixels of the examination window, the running total being proportional to the definition score of an image.