نتایج جستجو برای: eye localization

تعداد نتایج: 293331  

Journal: :iranian journal of radiology 0
ali alamdaran mashhad university of medical sciences,mashhad,iran; ramin sadegi mashhad university of medical sciences,mashhad,iran aida sharifi mashhad university of medical sciences,mashhad,iran elaheh moododi mashhad university of medical sciences,mashhad,iran naser forghani mashhad university of medical sciences,mashhad,iran

conclusions radio-guided localization of non-palpable breast lesions is an acceptable method because of technical facilitation, accurate localization and complete excision with limited complications. so it can be recommended as an alternative method for wire-guided localization. results pathologic results were benign in 90.5% and malignant in 9.5% of patients. post-operative margin of lesion wa...

2003
Harold Bekkering Richard A. Abrams

When a saccade target is shortened in amplitude during the eye movement towards it, subjects will initially overshoot the displaced target and make secondary movements to fixate it. Nevertheless, after a few trials the eye adapts and goes directly to the final displaced target position. The aim of the present study was to examine whether hand pointing will be influenced by saccadic adaptation. ...

Journal: :Expert Syst. Appl. 2014
Jaeik Jo Sung Joo Lee Kang Ryoung Park Ig-Jae Kim Jaihie Kim

Accurate classification of eye state is a prerequisite for preventing automobile accidents due to driver drowsiness. Previous methods of classification, based on features extracted for a single eye, are vulnerable to eye localization errors and visual obstructions, and most use a fixed threshold for classification, irrespective of variations in the driver’s eye shape and texture. To address the...

Journal: :Investigative ophthalmology & visual science 1982
Y Shimizu Y Kuwayama M Fukuda I Ishimoto S Shiosaka S Inagaki H Takagi M Sakanaka E Senba Y Kawai K Takatsuki M Tohyama

Localization of substance P (SP)-like immunoreactivity in the anterior eye segment of the squirrel was examined immunohistochemically. The present study demonstrates a dense network of SP-positive fibers in the ciliary body, particularly in the muscle layers, and several SP-positive fibers in the iris, in addition to scattered SP-positive fibers in the cornea. These facts strongly suggest that ...

Journal: :Vision Research 2010
Marius Blanke Ludwig Harsch Jonas Knöll Frank Bremmer

Spatial perception is modulated by eye movements. During smooth pursuit, perceived locations are shifted in the direction of the eye movement. During active fixation, visual space is perceptually compressed towards the fovea. In our present study, we were interested to determine the time course of spatial localization during pursuit initiation, i.e. the transition period from fixation to steady...

Journal: :Agriculture 2022

Currently, pineapple processing is a primarily manual task, with high labor costs and low operational efficiency. The ability to precisely detect locate eyes critical achieving automated eye removal. In this paper, machine vision automatic control technology are used build recognition positioning test platform, using the YOLOv5l target detection algorithm quickly identify images. A 3D localizat...

2012
Tom J. Van Grootel Robert F. Van der Willigen A. John Van Opstal

How the brain maintains an accurate and stable representation of visual target locations despite the occurrence of saccadic gaze shifts is a classical problem in oculomotor research. Here we test and dissociate the predictions of different conceptual models for head-unrestrained gaze-localization behavior of macaque monkeys. We adopted the double-step paradigm with rapid eye-head gaze shifts to...

Journal: :J. Database Manag. 2016
Yeli Zhao Keng Siau

This paper reviews cognitive neuroscience and several neurophysiological tools (e.g., fMRI, PET, EEG, MEG, and eye tracking). The strengths and weaknesses of such tools for information systems research are presented. The paper provides examples of existing cognitive neuroscience studies in varies areas, such as neuroeconomics, neuromarketing, and eye tracking. In addition, this paper provides a...

Journal: :Neuroreport 1997
K Guo C Y Li

Extracellular recordings were made in the striate cortex in awake, behaving monkeys to test the influence of the eye position on cellular activity. Two monkeys (Macaca mulatta) were trained to fixate a small spot at 25 different eye positions. About half (52%) of the studied neurones showed a selective gaze field (GF). The cells' activities increased significantly when the monkey fixated at thi...

Journal: :Journal of neurophysiology 2010
Tom J Van Grootel A John Van Opstal

To generate an accurate saccade toward a sound in darkness requires a transformation of the head-centered sound location into an oculocentric motor command, which necessitates the use of an eye-in-head position signal. We tested whether this transformation uses a continuous representation of eye position by exploiting the property that the oculomotor neural integrator is leaky with a time const...

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