Results 261 to 270 of about 76,843 (311)

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

open access: yesAdvanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun   +3 more
wiley   +1 more source

Tumbling Magnetic Microrobots for Targeted In Vivo Drug Delivery in the GI Tract

open access: yesAdvanced Robotics Research, EarlyView.
We introduce a microrobot design and integrated system for on‐demand targeted drug release in the gastrointestinal tract. The microrobot has an embedded magnet for actuation with external magnetic fields and is visualized in real time using ultrasound. It has two drug release ports sealed with a thermally sensitive wax. Local heating of the wax using a
Aaron C. Davis   +7 more
wiley   +1 more source

Smart vision sensors

Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269), 2002
Smart vision sensors represent a niche in machine vision where high performance in terms of frame rates, processing speed, and flexibility is the most essential feature. With the integration of photosensitive devices with processing elements on one and the same substrate it is possible to reach high performance at low complexity and low cost.
Mats Gökstorp, Robert Forchheimer
openaire   +1 more source

A digital vision sensor

Sensors and Actuators A: Physical, 1995
Abstract This paper presents a monolithic 128 × 128 pixel optical sensor with analog-to-digital converters, control and interface circuits designed specifically for direct connection to a host processor. The structure of the sensor leads to a reduction in the global complexity of the image-acquisition hardware and to the replacement of the noise ...
M. Gottardi   +3 more
openaire   +2 more sources

Panoramic stereo vision sensor

Proceedings. Fourteenth International Conference on Pattern Recognition (Cat. No.98EX170), 2002
Classical computer vision, like human vision, only allows one to consider a narrow angle of view of an observed scene. Panoramic vision gives a solution to this problem by permitting a full 360/spl deg/ vision. This paper presents a general overview of all the panoramic sensors used up to now. We also introduce our new panoramic sensor based on the use
Ryad Benosman, Jean Devars
openaire   +1 more source

Scalable vision graph estimation for a vision sensor network

2009 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2009
This paper describes a scalable method of estimating a vision graph, in which a pair of camera nodes are connected by an edge if the two nodes share the same field of view, based on local image feature correspondences. The proposed method is implemented in a distributed fashion, meanwhile avoiding the flooding of the image feature information since it ...
Shin Kondo   +2 more
openaire   +1 more source

Vision systems or vision sensors?

Sensor Review, 1987
Many industrial applications could benefit from line imaging‐based edge sensors rather than full‐scale vision systems, a leading specialist argues.
openaire   +1 more source

Neuromorphic Vision Sensors

Science, 2000
Vision is one of the most useful sensory functions, but the real-time processing of the continuous, high-dimensional input signals provided by vision sensors is a major challenge in robot design. Conventional digital vision sensors tend to have excessive power consumption, size, and cost for useful applications.
Giacomo Indiveri, Rodney Douglas
openaire   +1 more source

Vision Sensors on the Webots Simulator

1998
This paper presents the implementation of the panoramic, linear, artificial retina EDI within the frame of the Webots mobile-robotics simulator. The structure and functioning of the simulation are presented. Realistic sensor readings and software compatibility are the two key concerns of the simulator. A realistic sensor output is obtained by modelling
Yuri López de Meneses, Olivier Michel
openaire   +1 more source

Smart Features for Dynamic Vision Sensors

2020 IEEE/ION Position, Location and Navigation Symposium (PLANS), 2020
This paper presents a semi-supervised procedure for training a fully convolutional neural network for interest point detection and description. Contrary to previously trained networks utilized for the same purpose, our network was tailored to work with event-based imagery from a downward facing camera aboard a fixed-wing unmanned aerial vehicle.
Zachary P. Friedel, Robert C. Leishman
openaire   +1 more source

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