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Smooth eye movement tracking under the conditions of the sensitivity of the visual space

Author: YeGuangLan
Tutor: YanHongMei
School: University of Electronic Science and Technology
Course: Biomedical Engineering
Keywords: Smooth eye movement tracking Visual space Sensitivity Note
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 54
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Abstract


In vision research , the study of the eye movement the eyes physiological parameters and movement parameters information sources engaged in basic research scientists and clinical ophthalmologist is the neurobiologist through eye movement analysis , the study of the neural mechanisms provide an objective basis for abnormal eye movement behavior is related to disease diagnosis and treatment also provides clues. Smooth tracking eye movements synchronous movement of the eyes with the slow-moving target , so that the image of the object is always keep an eye movement in the visual fovea region . In track conditions , visual attention will be assigned to track the target , at the same time , there is still some perception of the surrounding stimulus breadth . Studies have shown that in the smooth track conditions , the stimulation of the peripheral visual sensitivity is influenced by many factors , such as position, speed , color , spatial frequency , stimulus contrast and sensitivity increase may be associated with small cell pathway neural mechanisms related. In this thesis, a smooth tracking eye movements under visual the space sensitivity and attention to the space allocated . Using eye movement tracking technology , detailed study had been test target accurate tracking of the premise , the different spatial distance , different position ( in the tracking direction above or below the front or rear ) rendering the outer peripheral letters (T / L) identification of the correct rate and reaction time . Experimental results show that , in the smooth tracking eye movement , and the gaze condition , visual spatial sensitivity with increasing the spatial distance decreases , to stimulate higher sensitivity than the vertical direction under the conditions of the visual stimulation of the visual sensitivity and in the horizontal direction . Meanwhile, in the a smoothing eye movement tracking under conditions of cognitive correct rate is less than the correct rate in the the gaze conditions under cognitive smoothing eye movement tracking condition , reaction time was significantly longer than the reaction time in the gaze condition . Letters presented by the tracking direction of the front and rear the rate of cognitive and reaction time , however , statistical analysis showed that the difference was not significant difference , which indicates that the visual sensitivity is independent of the direction of tracking eye movement , i.e. smooth tracking eye movement focus attention on the track the target , and not with the eye movement ahead and postponed .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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