Performance of visual tasks from contour information

Yitzhaky, Yitzhak; Itan, Liron

doi:10.1117/12.860027

Cited by 2 publications

(5 citation statements)

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“…This could result from the benefits of the enhancement, such as improved CS and VF but also could be due to other factors, such as increased participant concentration, the relatively large obstacles used in the experiments, or the participants merely taking their time to complete the mobility course safely. Although the effect on mobility has not been tested thoroughly, the minification technique proved to be useful in expanding VF 66,67 and improving visual search performance 71,72 in people with RP.…”

Section: Discussionmentioning

confidence: 99%

“…Some studies simulated LV in people with normal vision using occlusion foils, 45 diffuser films, 60,67 or by avoiding using optical corrections 81 to reduce VA and CS and simulate tunnel vision. 72 Although these low vision simulations can be useful, they cannot simulate other visual problems, such as light sensitivity, color vision impairment, or patchy vision. Besides, many visual problems progress slowly over time, so people with LV may adapt to make use of less visual information and rely more heavily on other senses.…”

Section: Discussionmentioning

confidence: 99%

“…Expanding VF size is potentially useful as it is an important predictor of mobility performance. [13][14][15] Eight studies, 54,[66][67][68][69][70][71][72] summarized in Appendix Table A2, assessed the effects of minification on orientation and mobility.…”

Section: Minificationmentioning

confidence: 99%

“…Visual search task performance was better using minified images that were based on colored contours rather than black and white contours. 72 These studies showed that minification techniques could also improve visual scanning, which is important for obstacle detection. The experiments in these studies used widely differing outcome measures, from VF size assessment to visual search and mobility course performance.…”

Section: Minificationmentioning

confidence: 99%

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Ability of Head-Mounted Display Technology to Improve Mobility in People With Low Vision: A Systematic Review

Htike

Margrain

Lai

et al. 2020

Trans. Vis. Sci. Tech.

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The purpose of this study was to undertake a systematic literature review on how vision enhancements, implemented using head-mounted displays (HMDs), can improve mobility, orientation, and associated aspects of visual function in people with low vision. Methods: The databases Medline, Chinl, Scopus, and Web of Science were searched for potentially relevant studies. Publications from all years until November 2018 were identified based on predefined inclusion and exclusion criteria. The data were tabulated and synthesized to produce a systematic review. Results: The search identified 28 relevant papers describing the performance of vision enhancement techniques on mobility and associated visual tasks. Simplifying visual scenes improved obstacle detection and object recognition but decreased walking speed. Minification techniques increased the size of the visual field by 3 to 5 times and improved visual search performance. However, the impact of minification on mobility has not been studied extensively. Clinical trials with commercially available devices recorded poor results relative to conventional aids. Conclusions: The effects of current vision enhancements using HMDs are mixed. They appear to reduce mobility efficiency but improved obstacle detection and object recognition. The review highlights the lack of controlled studies with robust study designs. To support the evidence base, well-designed trials with larger sample sizes that represent different types of impairments and real-life scenarios are required. Future work should focus on identifying the needs of people with different types of vision impairment and providing targeted enhancements. Translational Relevance: This literature review examines the evidence regarding the ability of HMD technology to improve mobility in people with sight loss.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Minificationmentioning

confidence: 99%

Section: Minificationmentioning

confidence: 99%

See 2 more Smart Citations

Ability of Head-Mounted Display Technology to Improve Mobility in People With Low Vision: A Systematic Review

Htike

Margrain

Lai

et al. 2020

Trans. Vis. Sci. Tech.

View full text Add to dashboard Cite

show abstract

“…One approach improved the size of VF, an important indicator of mobility performance [53], by overlaying a minified edge or colour image of the wider visual scene onto the centre of the field of view [14,35,55,57,72,73,95,101]. It is targeted to people with peripheral vision loss and its impact on mobility performance is yet to be tested extensively.…”

Section: Technology-based Visual Mobility Aidsmentioning

confidence: 99%

Augmented Reality Glasses as an Orientation and Mobility Aid for People with Low Vision: a Feasibility Study of Experiences and Requirements

Htike

Margrain

Lai

et al. 2021

Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems

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People with low vision experience reduced mobility that affects their physical and mental wellbeing. With augmented reality (AR) glasses, there are new opportunities to provide visual and auditory information that can improve mobility for this vulnerable group. Current research into AR-based mobility aids has focused mainly on the technical aspects, and less emphasis has been placed on understanding the usability and suitability of these aids in people with various levels of visual impairment. In this paper, we present the results of qualitative interviews with 18 participants using HoloLens v1 and eight prototype augmentations to understand how these enhancements are perceived by people with low vision and how these aids should be adjusted to suit their needs. Our results suggested that participants with moderate vision loss could potentially perceive the most benefit from glasses and underlined the importance of extensive customizability to accommodate the needs of a highly varied low vision population. CCS CONCEPTS • Human-centered computing~Accessibility~Accessibility technologies•Social and professional topics~User characteristics~People with disabilities

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Performance of visual tasks from contour information

Cited by 2 publications

References 0 publications

Ability of Head-Mounted Display Technology to Improve Mobility in People With Low Vision: A Systematic Review

Ability of Head-Mounted Display Technology to Improve Mobility in People With Low Vision: A Systematic Review

Augmented Reality Glasses as an Orientation and Mobility Aid for People with Low Vision: a Feasibility Study of Experiences and Requirements

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