A significant hurdle for the widespread adoption of iris recognition in security applications is that the typically small imaging volume for eye placement results in systems that are not user friendly. Separable cubic phase plates at the lens pupil have been shown to ameliorate this disadvantage by increasing the depth of field. However, these phase masks have limitations on how efficiently they can capture the information-bearing spatial frequencies in iris images. The performance gains in information acquisition that can be achieved by more general, nonseparable phase masks is demonstrated. A detailed design method is presented, and simulations using representative designs allow for performance comparisons.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ao.47.004684 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Stimulate to Remember? The Effects of Short Burst of Transcutaneous Vagus Nerve Stimulation (taVNS) on Memory Performance and Pupil Dilation.
Psychophysiology
January 2025
Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
The decline in noradrenergic (NE) locus coeruleus (LC) function in aging is thought to be implicated in episodic memory decline. Transcutaneous auricular vagus nerve stimulation (taVNS), which supports LC function, might serve to preserve or improve memory function in aging. However, taVNS effects are generally very heterogeneous, and it is currently unclear whether taVNS has an effect on memory.
View Article and Find Full Text PDFAssessment of Speech Processing and Listening Effort Associated With Speech-on-Speech Masking Using the Visual World Paradigm and Pupillometry.
Trends Hear
January 2025
Faculty of Medicine and University Hospital Cologne, Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany.
Speech-on-speech masking is a common and challenging situation in everyday verbal communication. The ability to segregate competing auditory streams is a necessary requirement for focusing attention on the target speech. The Visual World Paradigm (VWP) provides insight into speech processing by capturing gaze fixations on visually presented icons that reflect the speech signal.
View Article and Find Full Text PDFSelf-face processing in relation to self-referential tasks in 24-month-old infants: A study through eye movements and pupillometry measures.
Conscious Cogn
January 2025
Faculty of Human-Environment Studies, Kyushu University, Fukuoka, Japan.
The aim of the current study was to investigate visual scan patterns for the self-face in infants with the ability to recognize themselves with a photograph. 24-month-old infants (N = 32) were presented with faces including the self-face in the upright or inverted orientation. We also measured infants' ability to recognize oneself in a mirror and with a photograph.
View Article and Find Full Text PDFAspergillus-related immune reconstitution inflammatory syndrome in pediatric cancer patients, clinical characteristics, imaging findings, and survival.
BMC Infect Dis
December 2024
Student Research Committee, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
Aspergillus-related immune reconstitution inflammatory syndrome (IRIS) is a challenge to diagnose in immunocompromised pediatric cancer patients with Invasive Pulmonary Aspergillosis (IPA). If not recognized, it can mimic disease progression and lead to overtreatment. Studies on Aspergillus-related IRIS in the pediatric population are scarce.
View Article and Find Full Text PDFMorphological Evidence Supports the Taxonomic Reinstatement of the Endemic Chinese Species (Iridaceae) by Segregation from .
Plants (Basel)
December 2024
Botanical Garden-Institute, Far Eastern Branch, Russian Academy of Sciences, 690024 Vladivostok, Russia.
Unfortunately, the statuses of the numerous names of the genus at specific rank remain unresolved. This study considers , the species that was first described in 1880 and then 30 years later and is, however, still synonymized with . The morphological relationship between these two species and , a previously unplaced name, has been assessed here.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!