It can be difficult to guide yourself across a crosswalk when your visual capabilities are limited, which can be an everyday issue for someone with impaired vision. This paper aims to alleviate that issue for zebra stripe crosswalks by proposing an algorithm that incorporates multiple properties of zebra stripe crosswalks with a neural network to assist in quickly and accurately identifying a crosswalk in video and pictures taken from a smartphone camera. This method improves the accuracy of zebra crosswalk detection in images. In a large dataset, it correctly identified 76.5% of zebra crosswalks, while reducing the false discovery rate (q-value) from 20% without using neural networks to 2.21% using this neural network method. Only 2.04% of non-crosswalk images as crosswalks using the neural network method.

The most common navigation aid visually-impaired people employ is a white cane, but, recently, technology has given rise to a varied set of sophisticated navigation aids. While these new aids can provide more assistance to a visually-impaired person than a white cane, they tend to be expensive due to a small market segment, which in turn can reduce their accessibility. In an effort to produce a technologically-advanced yet accessible navigation aid, an Android application is proposed that detects and notifies users about obstacles within their path through the use of a smartphone's camera. While the smartphone is mounted on a harness worn by the user, the Walking Assistant application operates by capturing images as the user walks, finding features of objects within each frame, and determining how the features have moved from image to image. If it is discovered that an object is moving towards the user, the Walking Assistant will activate the smartphone's vibration mode to alert the user to the object's presence. Additionally, the user can control the Walking Assistant through the use of either touch or voice commands. By conducting real-world tests, it was determined that the Walking Assistant can correctly identify obstacles 42.1% of the time, while generating false positive obstacle identifications only 15.0% of the time. The accuracy of the Walking Assistant can be further improved by implementing additional features, such as a fuzzy-decision-based thresholding system or image stabilization.

The growth of web-based malware and phishing attacks has catalyzed significant advances in the research and use of interstitial warning pages and modals by a browser prior to loading the content of a suspect site. These warnings commonly use visual cues to attract users' attention, including specialized iconography, color, and an absence of buttons to communicate the importance of the scenario. While the efficacy of visual techniques has improved safety for sighted users, these techniques are unsuitable for blind and visually impaired users. This is likely not due to a lack of interest or technical capability by browser manufactures, where universal design is a core tenet of their engineering practices, but instead a reflection of the very real dearth of research literature to inform best practices, exacerbated by a deficit of clear methodologies for conducting studies with this population. Indeed, the challenges are manifold. In this paper, we present the results of our study analyzing the experiences of the visually impaired with browser security warnings, detail the development and advancement of the methodological best practices when conducting a study of this kind, and ultimately identify some initial approaches that could improve the security for this population.

No / This paper describes a set of experiments that investigated the use of rising pitch notes to communicate graphical information to visually impaired users. The information communicated in the experiments included coordinate locations within a 40×40 graphical grid, the navigation of an auditory cursor within the graphical grid, the communication of simple graphical shapes and their size. The five simple shapes communicated were rectangles, squares, circles, horizontal and vertical lines. Stereophony, timbre, rhythms, and short tunes were used in addition to the rising pitch metaphor to aid disambiguation. Results suggested that the rising pitch approach enabled visually impaired users to understand the graphical information communicated in the absence of any visual aid. The paper concludes with a discussion of the use of rising pitch metaphor to communicate graphical information.

Sight is essential in our daily tasks. Compensatory senses have been used for centuries by visually impaired individuals to navigate independently. The help of technology can minimize some challenges for visually impaired individuals. Assistive navigation technologies facilitate the pathfinding and tracing in indoor scenarios. Different modules are added to assistive navigation technologies to warn about the obstacles not only on the ground but about hanging objects. In this work, we attempt to explore new methods to assist visually impaired individuals in navigating independently in an indoor scenario. We employed a location estimation algorithm based on the fingerprinting method to estimate the initial location of the user. We mitigate the error of estimation with particle filter. The shortest path has been calculated with an A* algorithm. To provide the user with an accident-free experiment, we employed an obstacle avoidance algorithm capable of warning the users about the potential hazards. Finally, to provide an effective means of communication with the user, we employed text-to-speech and speech recognition algorithms. The main contribution of this work is to glue these modules together efficiently and affordably.

No description available.

This thesis embodies the results of an investigation of a residence exclusively devoted to those who r blind. Working within the theoretical perspective of symbolic interactionism, the primary focus of this study was to discover whether relationship existed between the pattern of group organization within the residence and the perception of the attitudes of the sighted towards the blind. Underlying its approach was the assumption that how the residents perceived the attitudes of the sighted was related to how they evaluated themselves. A second focus of this study was to determine the basis and extent of group formation within the residence. / Thesis / Master of Arts (MA)

This paper presents findings from a study designed to identify skills and strategies students with visual impairments have developed to aid their social integration into higher education campus life. Attending college provides numerous learning opportunities outside the classroom. The study explores the process by which students at two universities in the Commonwealth of Virginia were able to identify, navigate, and participate in extra-curricular activities. Previous research by Roy & MacKay (2002) and Hodges & Keller (1999) provides a quantitative framework from which a qualitative tapestry was woven. A secondary purpose of the study was to verify the validity of Roy & MacKay's finding that the age that individuals first experience visual disability and the visibility of their visual impairment (the variance in their ability to appear sighted) are valid predictors of social integration of visually impaired students among college students. This study is important for several reasons, including, (a) to help develop a more inclusive campus environment, (b) to identify factors that have influenced the selection of post-secondary educational experiences by visually-impaired students, and (c) to give a voice to visually impaired students to help administrators understand their needs and desires (Henderson, 2001). / Ph. D.

The purpose of this study was to describe the prevalence of self-reported visual and neck/shoulder complaints among individuals with a low vision diagnosis. The study also aimed to examine whether there was an association between the degree of self-rated visual and the neck/shoulder complaints. There was a questionnaire survey that was conducted on patients that visits an eye center in a county in central Sweden. There were a total of 18 people participated in the survey, between 17-92 years old. The questionnaire contained 22 questions and was analyzed with SPSS. The results showed how the distributions of answers were to the questions about the respondents’ vision respectively of respondents’ musculoskeletal problems. Results also showed that there was an association between the degree of self- rated visual difficulties and the degree of self- rated neck/shoulder disorder. The results in this study support the hypothesis that a relationship exists between visual and musculoskeletal problems. / Syftet med denna studie varatt beskriva förekomsten av självskattade syn och nacke/skuldra besvär hospersoner med ögonsjukdomar. Studien syftade också till att undersöka om det fannsett samband mellan graden av självskattade synbesvär och självskattade besvär inacke/skuldra. Enkätundersökning genomfördes på patienter som besökte ensyncentral i ett län i mellersta Sverige. Totalt 18 personer deltog iundersökningen, inom ålderskategorin 17-92 år gamla. Enkäten innehöll 22 frågorinklusive bakgrundsfrågor om kön och livsfaktorer som sedan analyserades medhjälp av databasen SPSS. Resultaten visade hur fördelningarna av svaren påfrågorna om respondenternas syn respektive muskuloskeletala problem. Resultatetvisade också att det fanns ett statistiskt signifikant samband mellan graden avsjälvbeskattade synbesvär och graden av självbeskattade nacke/skuldra besvär.Resultaten ger stöd för hypotesen att det finns en relation mellan öga-nacke/skuldrabesvär hos synsvaga individer.

Self-concept scores of 19 visually-impaired adults were compared to those of 19 matched sighted adults using the Tennessee Self-Concept Scale (TSCS). All participants attended the University of North Texas. Scores were examined against the Vocabulary and Information subtests of the Wechsler Adult Intelligence Scale-Revised (WAIS-R).