Search Results for author: Piotr Maciejewicz

Found 15 papers, 1 papers with code

Post-Mortem Iris Recognition Resistant to Biological Eye Decay Processes

no code implementations5 Dec 2019 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper proposes an end-to-end iris recognition method designed specifically for post-mortem samples, and thus serving as a perfect application for iris biometrics in forensics.

Iris Recognition

Post-mortem Iris Decomposition and its Dynamics in Morgue Conditions

no code implementations7 Nov 2019 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

With increasing interest in employing iris biometrics as a forensic tool for identification by investigation authorities, there is a need for a thorough examination and understanding of post-mortem decomposition processes that take place within the human eyeball, especially the iris.

Iris Recognition

Post-mortem Iris Recognition with Deep-Learning-based Image Segmentation

1 code implementation7 Jan 2019 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

We propose to use deep learning-based iris segmentation models to extract highly irregular iris texture areas in post-mortem iris images.

Image Segmentation Iris Recognition +3

Iris recognition in cases of eye pathology

no code implementations4 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

To make this study possible, a special database of iris images has been used, representing more than 20 different medical conditions of the ocular region (including cataract, glaucoma, rubeosis iridis, synechiae, iris defects, corneal pathologies and other) and containing almost 3000 samples collected from 230 distinct irises.

Image Segmentation Iris Recognition +1

Database of iris images acquired in the presence of ocular pathologies and assessment of iris recognition reliability for disease-affected eyes

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper presents a database of iris images collected from disease affected eyes and an analysis related to the influence of ocular diseases on iris recognition reliability.

Iris Recognition

Iris Recognition Under Biologically Troublesome Conditions - Effects of Aging, Diseases and Post-mortem Changes

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper presents the most comprehensive analysis of iris recognition reliability in the occurrence of various biological processes happening naturally and pathologically in the human body, including aging, illnesses, and post-mortem changes to date.

Pupil Dilation

Post-mortem Human Iris Recognition

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

We found that more than 90% of irises are still correctly recognized when captured a few hours after death, and that serious iris deterioration begins approximately 22 hours later, since the recognition rate drops to a range of 13. 3-73. 3% (depending on the method used) when the cornea starts to be cloudy.

Iris Recognition

Cataract influence on iris recognition performance

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

Results show a significant degradation in iris recognition reliability manifesting by worsening the genuine scores in all three matchers used in this study (12% of genuine score increase for an academic matcher, up to 175% of genuine score increase obtained for an example commercial matcher).

Image Segmentation Iris Recognition +1

Implications of Ocular Pathologies for Iris Recognition Reliability

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper presents an analysis of how iris recognition is influenced by eye disease and an appropriate dataset comprising 2996 images of irises taken from 230 distinct eyes (including 184 affected by more than 20 different eye conditions).

Iris Recognition

Assessment of iris recognition reliability for eyes affected by ocular pathologies

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

To our knowledge this is the first database of iris images for disease-affected eyes made publicly available to researchers, and the most comprehensive study of what we can expect when the iris recognition is deployed for non-healthy eyes.

Iris Recognition

Human Iris Recognition in Post-mortem Subjects: Study and Database

no code implementations1 Sep 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper presents a unique study of post-mortem human iris recognition and the first known to us database of near-infrared and visible-light iris images of deceased humans collected up to almost 17 days after death.

Iris Recognition

Perception of Image Features in Post-Mortem Iris Recognition: Humans vs Machines

no code implementations11 Jul 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper explores two ways of broadening this knowledge: (a) with an eye tracker, the salient features used by humans comparing iris images on a screen are extracted, and (b) class-activation maps produced by the convolutional neural network solving the iris recognition task are analyzed.

General Classification Iris Recognition

Presentation Attack Detection for Cadaver Iris

no code implementations11 Jul 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

We also show that the post-mortem iris detection accuracy increases as time since death elapses, and that we are able to construct a classification system with APCER=0%@BPCER=1% (Attack Presentation and Bona Fide Presentation Classification Error Rates, respectively) when only post-mortem samples collected at least 16 hours post-mortem are considered.

General Classification

Iris Recognition After Death

no code implementations5 Apr 2018 Mateusz Trokielewicz, Adam Czajka, Piotr Maciejewicz

This paper presents a comprehensive study of post-mortem human iris recognition carried out for 1, 200 near-infrared and 1, 787 visible-light samples collected from 37 deceased individuals kept in the mortuary conditions.

Iris Recognition

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