Inexpensive tactile interaction for blind computer users: two application domains

Petrie, Helen; Johnson, Valerie; McNally, Peter R.; Morley, Sarah; O'Neill, Anne-Marie; Majoe, Dennis

doi:10.1049/ic:19970081

Cited by 6 publications

(3 citation statements)

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“…The multiplexing scheme used in this work achieves turning on one row of dots for a short period of time and then turning on the next. Doing this fast enough will completely eliminate any flicker and the solenoid will appear activated, (Sandhu, 2009;Petrie, 1997). We connect the solenoids in row and column manner (as shown in Figure 5).…”

Section: A Tactile Display Control (Solenoid Dot Matrix)mentioning

confidence: 99%

Web Navigation Tool for Visually Impaired People

Babiker

Ahmed

Yasin

2012

International Journal of Information Technology and Web Engineering

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Internet access has become a necessity for all sectors in communities. Conventional web navigation means hinder access to the visually impaired. Presented is a low cost tactile web navigator device aimed at enabling blind people to have efficient and economic internet accessibility. Presented in this paper centers around a microcontroller that communicates with a proxy transcoder browser server that runs on a PC to acquire the text from a target web page. An array of solenoid coils is used to output the text in tactile form to the end user. The device has the ability to output the text in Braille language format mode or in plain English character format using the usual dot-matrix representations mode. The navigator can also be configured to output the text in other languages using the Pattern-Generator tool Many navigation functions like loading a webpage address, clicking on links and entering data (E-mails, passwords, etc) have been provided. The navigator was tested by blind volunteer with excellent results. The cost of the implementation is an impressive ~12% of the price of commercial Braille displays.

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Section: A Tactile Display Control (Solenoid Dot Matrix)mentioning

confidence: 99%

Web Navigation Tool for Visually Impaired People

Babiker

Ahmed

Yasin

2012

International Journal of Information Technology and Web Engineering

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“…Petrie [19] and Challis [20] both describe the use of tactile embossed diagrams as an inexpensive computer interface for visually impaired users. Embossed diagrams still possess many advantages over more hi-tech solutions even today -they are cheap to produce, have no moving parts, and can be quickly and easily explored with the whole of both hands to provide a good overview of the information being displayed.…”

Section: Raised Static Materials Displaymentioning

confidence: 99%

Sensory substitution using tactile pin arrays: Human factors, technology and applications

Wall

Brewster

2006

Signal Processing

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Tactile arrays use a matrix of individually controllable elements to present spatial and temporal patterns of cutaneous information. Early devices of this type were in the field of sensory substitution to replace vision or hearing for users with a sensory impairment. Many advances have been made due to the appropriation of tactile displays for telerobotics and virtual reality, to represent physical contact with a remote or simulated environment. However, many of these have been limited to engineering prototypes. The recent commercial availability of affordable, portable tactile pin arrays has provided renewed impetus to apply the technology to sensory substitution applications. Lack of access to digitally stored data can prove a significant barrier to blind people seeking careers in numerate disciplines. Tactile displays could potentially provide a discrete and portable means of accessing graphical information in an intuitive non-visual manner. Results are presented from experiments on tactual perception related to understanding graphs and simple visualisations with a commercially available tactile array device. It was found that subjects could discriminate positive or negative line gradient to within 74.71 of the horizontal, compared to 73.251 for results with a force feedback mouse and 72.421 with a raised paper representation. r

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“…However, there are situations when visual information is not available, such as in the case of underwater robotics or manipulation of objects by blind persons [4], [5], where touch remains the only sensing modality available for the recognition of the objects encountered in the working environment.…”

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confidence: 99%

Robotic Tactile Recognition of Pseudorandom Encoded Objects

Petriu

Yeung

Das

et al. 2004

IEEE Trans. Instrum. Meas.

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Abstract-This paper discusses an original model-based method for blind robotic tactile recognition of three-dimensional objects. Conveniently shaped geometric symbols representing terms of a pseudorandom array (PRA) are embossed on object surfaces. Symbols recovered by tactile probing are recognized using a neural network and then clustered in a PRA window that contains enough information to fully identify the absolute coordinates of the recovered window within the encoding PRA. By knowing how different object models were mapped to the PRA, it is possible to unambiguously identify the object face and the exact position of the recovered symbols on the face.Index Terms-Object recognition, pseudorandom arrays, tactile system, three-dimensional object model.

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Inexpensive tactile interaction for blind computer users: two application domains

Cited by 6 publications

References 0 publications

Web Navigation Tool for Visually Impaired People

Web Navigation Tool for Visually Impaired People

Sensory substitution using tactile pin arrays: Human factors, technology and applications

Robotic Tactile Recognition of Pseudorandom Encoded Objects

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