Results 81 to 90 of about 8,605 (249)

Fractal Markers: A New Approach for Long-Range Marker Pose Estimation Under Occlusion

IEEE Access, 2019
Squared fiducial markers are a powerful tool for camera pose estimation in applications such as robots, unmanned vehicles and augmented reality. The four corners of a single marker are enough to estimate the pose of a calibrated camera.
Francisco J. Romero-Ramire, Rafael Munoz-Salinas, R. Medina-Carnicer   +2 more
doaj   +1 more source

Order type dataset analysis for fiducial markers

Data in Brief, 2018
Order Type (OT) describes a point set avoiding the use of metric information. We show that OT is a descriptor which is invariant to Euclidean geometric transformations, change of scale and perspective projection. In this paper we provide the data related to the application of Order Type with sets of 5, 6, 7, and 8 points to build fiducial markers.
Heriberto Cruz Hernández, Luis Gerardo de la Fraga   +1 more
openaire   +3 more sources

Grooved Surface of the Obturator Internus Muscle With Two Distinct Adjacent Parts

Clinical Anatomy, EarlyView.
ABSTRACT The specific anatomical features of the obturator internus, particularly those of its medial surface, remain insufficiently characterized. This study investigated the morphology of the obturator internus muscle by focusing on the shape of its medial surface and potential age‐related changes.
Satoru Muro, Junichi Tsuchiya, Takuya Ibara, Akimoto Nimura, Keiichi Akita   +4 more
wiley   +1 more source

Robust Tracking Through the Design of High Quality Fiducial Markers: An Optimization Tool for ARToolKit

IEEE Access, 2018
Fiducial markers are images or landmarks placed in real environment, typically used for pose estimation and camera tracking. Reliable fiducials are strongly desired for many augmented reality (AR) applications, but currently there is no systematic method
Dawar Khan, Sehat Ullah, Dong-Ming Yan, Ihsan Rabbi, Paul Richard, Thuong Hoang, Mark Billinghurst, Xiaopeng Zhang   +7 more
doaj   +1 more source

Presentation Assistant and Kiosk Interaction with Fiducial Markers

2007 IEEE International Workshop on Haptic, Audio and Visual Environments and Games, 2007
Fiducial markers and computer vision software provide a low cost and flexible way for human-computer interaction. Using the high reliability and minimal image pixel requirements of the ARTag fiducial marker system we are able to identify users and perform control actions with a simple small printed pattern. We describe two novel applications.
Crease, Murray, Fiala, Mark
openaire   +3 more sources

Preclinical Serial Assessment of Virtual Physiology After Implantation of a Novel Endoluminal Resorbable Fibrillated Scaffold

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Background The resorbable fibrillated scaffold (RFS) is a novel electrospun, polylactide‐based endoluminal scaffold developed for peripheral arterial applications. Its porous microfibre architecture is intended to support host cell infiltration and vascular restoration.
Kotaro Miyashita, Lucas Hatzikostas, Emiliano Bianchini, Milosz Dziarmaga, Chun‐Ting Shih, Jouke Dijkstra, Eric K. W. Poon, Bart Sanders, Golo von Basum, Rick de Vries, Kim van Noort, Marc van Sambeek, Jos C. van den Berg, Albert Chinhenzva, Scot Garg, Yoshinobu Onuma, Patrick W. Serruys   +16 more
wiley   +1 more source

Microscopic tumor spread beyond (echo)endoscopically determined tumor borders in esophageal cancer

Radiation Oncology, 2019
Objective The microscopic tumor spread (MS) beyond the macroscopic tumor borders of esophageal tumors is crucial for determining the clinical target volume (CTV) in radiotherapy. The question arises whether current voluminous CTV margins of 3–5 cm around
Melanie Machiels, Maurits L. van Montfoort, Nikki B. Thuijs, Mark I. van Berge Henegouwen, Tanja Alderliesten, Sybren L. Meijer, Jeanin E. van Hooft, Maarten C. C. M. Hulshof   +7 more
doaj   +1 more source

Investigating the Cytoskeleton of DRGs Using Cryo‐Electron Microscopy and Deep Learning

Cytoskeleton, EarlyView.
ABSTRACT We describe a method for determining the ultrastructural organization of axons and varicosities of cultured dorsal root ganglion (DRG) neurons using cryogenic electron microscopy (cryo‐EM). Cryo‐EM reveals the dimensions, proximity, and overall organization of biological specimens in a near‐native state, avoiding artifacts of fixation and ...
M. Neal Waxham, Mihir Relan, Matthew T. Swulius, Andrea K. H. Stavoe   +3 more
wiley   +1 more source

FidMark: A Fiducial Marker Ontology for Semantically Describing Visual Markers

Fiducial markers are visual objects that can be placed in the field of view of an imaging sensor to determine its position and orientation, and subsequently the scale and position of other objects within the same field of view. They are used in a wide variety of applications ranging from medical applications to augmented reality (AR) solutions where ...
Maxim Van de Wynckel, Jorge Isaac Valadez, Beat Signer   +2 more
openaire   +2 more sources

Double Sided Traction Force Microscopy: A Method to Confine Cells for Physiologically Relevant Force Measurements

Cytoskeleton, EarlyView.
ABSTRACT In this paper we describe a technique to make a confined environment of variable stiffness that is suitable for high‐resolution live‐cell imaging. This versatile and adaptable technique enables cell confinement between soft elastic surfaces made from polyacrylamide gels.
Alexia Caillier, Patrick W. Oakes
wiley   +1 more source