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UID:calendarize-defense-of-the-doctoral-dissertation-linda-krauze
DTSTAMP:20260817T145138Z
DTSTART:20261009T120000Z
DTEND:20261008T210000Z
SUMMARY:Defense of the doctoral dissertation: LINDA KRAUZE
DESCRIPTION:Topic: "Quantitative analysis of eye movement and vergence parameters in digital three-dimensional environments".\nScientific supervisor: Dr. phys. Gunta Krūmiņa.\n \nAbstract:\nThis thesis focuses on the assessment of spatial perception in digital three-dimensional visualization environments. The doctoral thesis presents the development and experimental validation of a methodology that integrates subjective measures of spatial performance with objective analysis of eye movement parameters\, thereby advancing approaches to depth perception assessment. The results demonstrate that the accuracy of distance estimation is significantly influenced by stimulus distance\, whereas the vergence–accommodation conflict significantly affects task completion time\, but not necessarily estimation accuracy. It was found that participants with binocular vision impairments exhibit greater distance estimation errors and a more pronounced tendency to overestimate distances under conditions of vergence–accommodation conflict. Eye movement analysis revealed that dwell time is associated with task performance accuracy and the spatial distribution of visual attention. More accurate responses were associated with a higher concentration of gaze within the target object area. Within the scope of this work\, a method for calculating the physiological vergence angle was developed using kappa angle correction and a linear regression approach. It was demonstrated that vergence estimates obtained without correction differ significantly from the expected values\, whereas the proposed method enables the derivation of physiologically interpretable vergence values. No significant effect of subjective fixation disparity or kappa angle on the deviation from the expected vergence angle was found\, indicating the stability of the method across individuals. The obtained results demonstrate that the vergence angle can be used as an objective indicator of depth perception and provide a basis for the assessment of spatial perception in digital three-dimensional visualization environments.\n \nReviewers:\nDr. habil. phys. Māris Ozoliņš\, University of Latvia\;Dr. phys. Alekseja Kataševs\, Riga Technical University\;Dr. Ilona Heldal\, Western Norway University of Applied Sciences\, Norway.\n \nThe doctoral thesis is available at the LU Library\, Raiņa bulvāris 19.\nParticipation in the online session is by prior application\, writing to sintija.silina@lu.lv by 6th of October.
X-ALT-DESC;FMTTYPE=text/html:Topic: "Quantitative analysis of eye movement and vergence parameters in digital three-dimensional environments".
\nScientific supervisor: Dr. phys. Gunta Krūmiņa.
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\nAbstract:
\nThis thesis focuses on the assessment of spatial perception in digital three-dimensional visualization environments. The doctoral thesis presents the development and experimental validation of a methodology that integrates subjective measures of spatial performance with objective analysis of eye movement parameters\, thereby advancing approaches to depth perception assessment. The results demonstrate that the accuracy of distance estimation is significantly influenced by stimulus distance\, whereas the vergence–accommodation conflict significantly affects task completion time\, but not necessarily estimation accuracy. It was found that participants with binocular vision impairments exhibit greater distance estimation errors and a more pronounced tendency to overestimate distances under conditions of vergence–accommodation conflict. Eye movement analysis revealed that dwell time is associated with task performance accuracy and the spatial distribution of visual attention. More accurate responses were associated with a higher concentration of gaze within the target object area. Within the scope of this work\, a method for calculating the physiological vergence angle was developed using kappa angle correction and a linear regression approach. It was demonstrated that vergence estimates obtained without correction differ significantly from the expected values\, whereas the proposed method enables the derivation of physiologically interpretable vergence values. No significant effect of subjective fixation disparity or kappa angle on the deviation from the expected vergence angle was found\, indicating the stability of the method across individuals. The obtained results demonstrate that the vergence angle can be used as an objective indicator of depth perception and provide a basis for the assessment of spatial perception in digital three-dimensional visualization environments.
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\nReviewers:
\nDr. habil. phys. Māris Ozoliņš\, University of Latvia\;
Dr. phys. Alekseja Kataševs\, Riga Technical University\;
Dr. Ilona Heldal\, Western Norway University of Applied Sciences\, Norway.
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\nThe doctoral thesis is available at the LU Library\, Raiņa bulvāris 19.
\nParticipation in the online session is by prior application\, writing to sintija.silina@lu.lv by 6th of October.
LOCATION:UL House of Science\, Jelgavas iela 3\, Room 501
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