Impact of viewing distance on relative depth judgements for stimuli in physical space

Tatjana Pladere; Gunita Jankovska; Vita Konosonoka; Karola Panke; Gunta Krumina

doi:10.1117/12.2530438

30 August 2019 Impact of viewing distance on relative depth judgements for stimuli in physical space

Tatjana Pladere, Gunita Jankovska, Vita Konosonoka, Karola Panke, Gunta Krumina

Proceedings Volume 11099, Light in Nature VII; 1109904 (2019) https://doi.org/10.1117/12.2530438
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

In natural viewing, numerous depth cues are available to the visual system, but their significance varies considerably depending on the viewing distance. How is it reflected in the outcome of depth judgements? We have designed a psychophysical experiment with a limited number of depth cues to examine distance-related changes in the correct response rate and time. Twenty young adults evaluated relative depth of stimuli in physical space. Each time four constant angular size achromatic stimuli were presented on a volumetric multi-planar display. One of these stimuli was demonstrated closer to the observer comparing to others. The experiment followed the four-interval forced-choice procedure. On any given trial, observers determined which one of four stimuli was located closest to them. The nine viewing distances ranged from 0.5 m to 2.5 m. Overall, the depth judgements were correct and fast at the close viewing distances. However, the correct response rate dropped markedly at 1.0 m distance and continued declining gradually at larger distances. The average response time experienced the linear growth with increasing distance. In total, we showed that the relative depth judgements based on binocular depth cues changed the most at the viewing distances that exceeded 1.0 m, as well as the response time and correctness were affected to varying degrees.

Citation Download Citation

Tatjana Pladere, Gunita Jankovska, Vita Konosonoka, Karola Panke, and Gunta Krumina "Impact of viewing distance on relative depth judgements for stimuli in physical space", Proc. SPIE 11099, Light in Nature VII, 1109904 (30 August 2019); https://doi.org/10.1117/12.2530438

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KEYWORDS

Visualization

3D volumetric display

3D volumetric displays

Optical components

3D displays

3D image processing

Statistical analysis

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