Results 11 to 20 of about 22,581 (264)
Keypoint localization and parameter measurement in ultrasound biomicroscopy anterior segment images based on deep learning [PDF]
BioMedical Engineering OnLineBackground Accurate measurement of anterior segment parameters is crucial for diagnosing and managing ophthalmic conditions, such as glaucoma, cataracts, and refractive errors.
Miao Qinghao +4 more
doaj +2 more sources
Model-based pupil and iris localization [PDF]
The 2012 International Joint Conference on Neural Networks (IJCNN), 2012 The iris is the most accurate biometric to date and its localization is a vital step in any iris recognition system. Iris localization can be considered as the search for the demarcation points, or step change in intensity at its boundaries. A failed localization will lead to incorrect iris segmentation and eventually to poor recognition.
Nitin K. Mahadeo +2 more
openaire +1 more source
A Pupil Segmentation Algorithm Based on Fuzzy Clustering of Distributed Information
Sensors, 2021 Pupil segmentation is critical for line-of-sight estimation based on the pupil center method. Due to noise and individual differences in human eyes, the quality of eye images often varies, making pupil segmentation difficult.
Kemeng Bai +2 more
doaj +1 more source
Circle-based Eye Center Localization (CECL) [PDF]
, 2015 We propose an improved eye center localization method based on the Hough transform, called Circle-based Eye Center Localization (CECL) that is simple, robust, and achieves accuracy on a par with typically more complex state-of-the-art methods.
Maes, Alfons +2 more
core +9 more sources
Dedicated hardware architecture for localizing iris in VW images
Journal of King Saud University: Computer and Information Sciences, 2022 This study presents dedicated hardware for iris localization that can be used as a coprocessor in the development of real-time and low-cost embedded iris biometric systems.
Vineet Kumar, Abhijit Asati, Anu Gupta
doaj +1 more source
Low-Complexity Pupil Tracking for Sunglasses-Wearing Faces for Glasses-Free 3D HUDs
Applied Sciences, 2021 This study proposes a pupil-tracking method applicable to drivers both with and without sunglasses on, which has greater compatibility with augmented reality (AR) three-dimensional (3D) head-up displays (HUDs). Performing real-time pupil localization and
Dongwoo Kang, Hyun Sung Chang
doaj +1 more source
Sensors, 2022 Iris localization in non-cooperative environments is challenging and essential for accurate iris recognition. Motivated by the traditional iris-localization algorithm and the robustness of the YOLO model, we propose a novel iris-localization algorithm ...
Qi Xiong +4 more
doaj +1 more source
A Fully Automatic Approach for the Accurate Localization of the Pupils [PDF]
, 2013 This paper presents a new method to automatically locate pupils in images (even with low-resolution) containing human faces. In particular pupils are localized by a two steps procedure: at first self-similarity information is extracted by considering the appearance variability of local regions and then they are combined with an estimator of circular ...
Marco Leo +3 more
openaire +5 more sources
A unified approach for automated segmentation of pupil and iris in on-axis images
Computer Methods and Programs in Biomedicine Update, 2022 We propose a unified approach for the automatic and accurate segmentation of the pupil and iris from on-axis grayscale eye images. The segmentation of pupil and iris is achieved with Basis-spline-based active contour and circular active contour ...
Grissel Priyanka Mathias +3 more
doaj +1 more source
Enhanced 4Pi single-molecule localization microscopy with coherent pupil based localization [PDF]
Communications Biology, 2020 AbstractOver the last decades, super-resolution techniques have revolutionized the field of fluorescence microscopy. Among them, interferometric or 4Pi microscopy methods exhibit supreme resolving power in the axial dimension. Combined with single-molecule detection/localization and adaptive optics, current 4Pi microscopy methods enabled 10–15 nm ...
Sheng Liu, Fang Huang
openaire +2 more sources