Results 141 to 150 of about 1,580,329 (205)

Automatic Virtual Portals Placement for Efficient VR Navigation

2022 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW), 2022
Portals placement in a large virtual scene can help users improve navigation efficiency, but determining the number and the positions of the portals has some challenges.
Lili Wang, Yi Liu, Xiaolong Liu, Jian Wu
semanticscholar   +1 more source

Navigating large virtual spaces

International Journal of Human-Computer Interaction, 1996
As important as navigation is to human performance in virtual worlds, it is an often overlooked problem in the design process. This article reports an experiment intended to show that real‐world wayfinding and environmental design principles are effective in designing virtual worlds that support skilled wayfinding behavior.
Rudolph P. Darken, John L. Sibert
openaire   +1 more source

Virtual DVL Reconstruction Method for an Integrated Navigation System Based on DS-LSSVM Algorithm

IEEE Transactions on Instrumentation and Measurement, 2021
Autonomous underwater vehicle (AUV) mostly relies on an integrated navigation system, which consists of a strap-down inertial navigation system (SINS) and Doppler velocity log (DVL).
Di Wang, Xiaosu Xu, Yiqing Yao, Tao Zhang   +3 more
semanticscholar   +1 more source

Interactive dynamic navigation for virtual endoscopy

Computers in Biology and Medicine, 1999
Complex anatomical information can be obtained from a 3D radiologic image by navigating through it in a manner similar to an endoscopic examination. Real-time computation of 'virtual' endoscopic views, however, is needed to permit interactive navigation. We present a fast volume-rendering method for computing such views.
K, Ramaswamy, W E, Higgins
openaire   +2 more sources

Virtual Global Landmark: An Augmented Reality Technique to Improve Spatial Navigation Learning

CHI Extended Abstracts, 2021
Navigation is a multifaceted human ability involving complex cognitive functions. It allows the active exploration of unknown environments without becoming lost while enabling us to move efficiently across well-known spaces.
Avinash Kumar Singh, Jia Liu, C. A. T. Cortes, Chin-Teng Lin   +3 more
semanticscholar   +1 more source

Navigational Maxillofacial Surgery Using Virtual Models

World Journal of Surgery, 2005
AbstractAblative tumor surgery and orbital and midface reconstruction, as much as orthognathic surgery, requires detailed planning using computed tomography (CT) or magnetic resonance imaging (MRI). These techniques also allow simulation of complex surgeries preoperatively.
Hohlweg-Majert, Bettina, Schön, Ralf, Schmelzeisen, Rainer, Gellrich, Nils-Claudius, Schramm, Alexander   +4 more
openaire   +3 more sources

Virtual Endoscopy: Navigation within Pelvicaliceal System

Journal of Endourology, 2005
To evaluate the use of virtual endoscopy (VE) for the investigation of the pelvicaliceal unit and the depiction of its anatomic deformities.Two study groups were prospectively enrolled in our protocol: ten patients with nonurologic pathologies, and thus without any known deformity of the pelvicaliceal unit (group A), and five patients with caliceal ...
Evangelos N, Liatsikos, Dimitrios, Siablis, George C, Kagadis, Dimitrios, Karnabatidis, Theodore, Petsas, Christina, Kalogeropoulou, Theodore P, Voudoukis, Anastasios, Athanassopoulos, Petros, Perimenis, George, Nikiforidis, George A, Barbalias   +10 more
openaire   +2 more sources

Navigation in hypertext through virtual environments

Applied Ergonomics, 1993
Users of hypertext systems require some form of navigation aid or 'browser'. Typically these have been produced as schematic representations of the hypertext network. The advent of 'virtual reality' technology, and particularly less costly forms of this, offers new possibilities for hypertext navigation whereby information can be presented in the form ...
P A, Smith, J R, Wilson
openaire   +2 more sources

Virtual Reality Simulation of Fluoroscopic Navigation

Clinical Orthopaedics & Related Research, 2006
Surgical navigation systems assist surgeons by tracking targets attached to the patient's bones and to the surgical tools. Fluoroscopic navigation is a technology that adds "live" imaging to surgical navigation. In order to identify the limitations and potential sources of errors in fluoroscopic navigation, a virtual environment is created in which all
Branislav, Jaramaz, Kort, Eckman
openaire   +2 more sources

Virtual Fluoroscopy: Computer-Assisted Fluoroscopic Navigation

Spine, 2001
In vitro accuracy assessment of a novel virtual fluoroscopy system.To investigate a new technology combining image-guided surgery with C-arm fluoroscopy.Fluoroscopy is a useful and familiar technology to all musculoskeletal surgeons. Its limitations include radiation exposure to the patient and operating team and the need to reposition the fluoroscope ...
K T, Foley, D A, Simon, Y R, Rampersaud
openaire   +2 more sources