22 papers · ranked by Valyu relevance
Kay Gijzen, Gertjan J. Burghouts, Daniël M. Pelt
Severe occlusions of objects pose a major challenge for computer vision. We show that two root causes are (1) the loss of visible information and (2) the distracting patterns caused by the occluders. Our approach addresses both causes at the same time. First, the distracting patterns are removed at test-time, via…
Wenbo Wei, Jun Wang, Abhir Bhalerao
Understanding Authors: ['Wenbo Wei' 'Jun Wang' 'Abhir Bhalerao'] Abstract—To help address the occlusion problem in panoptic segmentation and image understanding, this paper proposes a new large-scale dataset, COCO-Occ, which is derived from the COCO dataset by manually labelling the COCO images into three perceived…
Karim Rajaei, Yalda Mohsenzadeh, Reza Ebrahimpour, Seyed-Mahdi Khaligh-Razavi
Core object recognition, the ability to rapidly recognize objects despite variations in their appearance, is largely solved through the feedforward processing of visual information. Deep neural networks are shown to achieve human-level performance in these tasks, and explain the primate brain representation. On the…
Guanyu Zhou, Wenxuan Liu, Wenxin Huang, Xuemei Jia + 2 more
Recognition under Occlusions Authors: Guanyu Zhou, Wenxuan Liu, Wenxin Huang, Xuemei Jia, Xian Zhong, Chia‐Wen Lin Title: OccludeNet: A Causal Journey into Mixed-View Actor-Centric Video Action Recognition under Occlusions Authors: Guanyu Zhou, Wenxuan Liu, Wenxin Huang, Xuemei Jia, Xian Zhong, Chia‐Wen Lin Content…
Xuexue Li, Wenhui Diao, Yongqiang Mao, Peng Gao + 3 more
'Xinming Li' 'Xian Sun'] Occlusion between objects is one of the overlooked challenges for object detection in UAV images. Due to the variable altitude and angle of UAVs, occlusion in UAV images happens more frequently than that in natural scenes. Compared to occlusion in natural scene images, occlusion in UAV images…
Aimee M. Torres Rojas, Alejandro Meza Romero, Ignacio Pagonabarraga, Rui D.M. Travasso + 1 more
We relate vascular network structure to hemodynamics after vessel obstructions. We consider tree-like networks with a viscoelastic fluid with the rheological characteristics of blood. We analyze the network hemodynamic response, which is a function of the frequencies involved in the driving, and a measurement of the…
Jang-Hyun Baek, Byung Moon Kim
Identification of intracranial, atherosclerosis-related, large vessel occlusion (ICAS-LVO) is important to set up an optimal endovascular treatment strategy, as most ICAS-LVOs require specific endovascular modalities for efficient recanalization. However, there is currently no decisive way to identify ICAS-LVO for…
Shiva Kamkar, Hamid Abrishami Moghaddam, Reza Lashgari, Lauri Oksama + 2 more
'Jie Li' 'Jukka Hyönä'] Occlusion is one of the main challenges in tracking multiple moving objects. In almost all real-world scenarios, a moving object or a stationary obstacle occludes targets partially or completely for a short or long time during their movement. A previous study ([28]) reported that subjects make…
Behnaz Nojavanasghari, Charles E. Hughes, Tadas Baltrušaitis, Louis‐Philippe Morency
'Louis‐Philippe Morency'] Abstract—A person's face discloses important information about their affective state. Although there has been extensive research on recognition of facial expressions, the performance of existing approaches is challenged by facial occlusions. Facial occlusions are often treated as noise and…
Jiawei Zhou, Yidong Wu, Yiya Chen, Xiaoxin Chen + 7 more
Recent laboratory finding suggest that short-term patching the amblyopic eye (i.e., inverse occlusion) results in a larger and more sustained improvement in the binocular balance compared with normal controls. In this study, we investigate the cumulative effects of the short-term inverse occlusion in adults and old…
Mustapha Jaouhari, Chaimae El Harrak, Farida Bentayeb, Youssef El Merabet
'Youssef El Merabet'] Objective: To investigate if the type of unilateral amblyopia can impact the improvement of visual acuity in amblyopic eyes during a longitudinal interventional study involving standard occlusion therapy in children. Methods: A longitudinal and interventional study of 91 children, aged 3-9 years…
Deokho Lee, Yohei Tomita, Lizhu Yang, Kazuno Negishi + 4 more
'Toshihide Kurihara' 'Stephanie C. Joachim' 'Urs Müller-Richter' 'Stefan Hartmann'] Ocular ischemic syndrome (OIS) is one of the severe ocular disorders occurring from stenosis or occlusion of the carotid arteries. As the ophthalmic artery is derived from the branch of the carotid artery, stenosis or occlusion of the…
Liang Zhu, Mengqi Wang, Yin Liu, Weijie Zhang + 3 more
In the cerebral cortex, the vasculature plays important homeostatic functions, especially at the highly connected complex capillary networks. The association of focal capillary ischemia with the neurodegenerative disease as well as the laminar vascular dynamics have prompted studies of vascular micro-occlusion via…
Şefik Evren Erdener, Jianbo Tang, Kıvılcım Kılıç, Dmitry Postnov + 7 more
Ever since the introduction of thrombolysis and the subsequent expansion of endovascular treatments for acute ischemic stroke, it remains to be identified why the actual outcomes are less favorable despite recanalization. Here, by high spatio-temporal resolution imaging of capillary circulation in mice, we introduce…
Jianfeng Huang, Yingyi Lu, Xiaoya Gu, Bodi Zheng + 1 more
Aims To compare the relationship between the nonperfusion area (NPA) on ultra-widefield fluorescein angiography (UWFFA) and the nonflow area (NFA) on optical coherence tomographic angiography (OCTA) in retinal vein occlusion (RVO). Methods Cross-sectional study. 46 eyes of 46 RVO patients who underwent UWFFA and OCTA.…
Hee Eun Lee, Yiyang Wang, Alaa E. Fayed, Amani A. Fawzi
Using optical coherence tomography angiography (OCTA) to characterize the types of collaterals in eyes with retinal vein occlusion (RVO) and further investigate their correlations with vessel densities of the superficial (SCP) and the deep capillary plexus (DCP). This cross-sectional study included 25 eyes of 23…
Benqi Zhao, Yicong Ji, Yangyang Xu, Wei Su + 1 more
In our study, all type 1 OVAs presented with no visualization of the proximal trunk OA resulting from autologous fat-induced OAO. However, all type 2 OVAs and most type 3 OVAs are caused by HA-induced OAO. We speculate that this was related to the size of the filler particles. The largest diameter is autologous fat…
Olukayode Majekodunmi, Sara Hashmi
In suspension flows through microchannels with parallel walls, rigid particles form clogs that grow continuously in the upstream direction. However, introducing a slight taper to channel walls leads to a qualitatively different clogging mechanism. Clogs of rigid particles do not grow continuously in these tapered…
Noor Abu Jarad, Jeffrey I Weitz, Tohid Didar
Improving the performance of blood-contacting medical implants is a global health necessity aimed at reducing mortality and morbidity in patients with cardiovascular diseases. Surface modification of the biomaterials from which the implants are constructed has been used to reduce the risk of complications such as…
Barrett Smith, Sara Hashmi
Polymer flows through pores, nozzles and other small channels govern engineered and naturally occurring dynamics in many processes, from 3D printing to oil recovery in the earth's subsurface to a wide variety of biological flows. The crosslinking of polymers can change their material properties dramatically, and it is…
Alina Dumitriu, Bogdan Dumitriu, Flavius George Socol, Ioana Denisa Socol + 6 more
Background and Objectives: Optic disc drusen (ODD) can mimic papilledema and are linked to structural crowding, microvascular change, and visual-field loss. We synthesized structural/microvascular differences, functional status and change, diagnostic performance, and ODD-NAION co-occurrence. Methods: This study used…
Gábor Holló
Optical coherence tomography angiography (OCTA) comprises different OCT-based technologies developed for non-invasive assessment and measurement of optic nerve head and retinal perfusion. Currently the most clinically established approach is based on the split spectrum amplitude decorrelation algorithm, which detects…