Mobile computer vision is often advocated as a promising technology to support blind people in their daily activities. However, there is as yet very little experience with mobile vision systems operated by blind users. This contribution provides an experimental analysis of a sign-based wayfinding system that uses a camera cell phone to detect specific color markers. The results of our experimen...

Applications are described for " blind substring search, " where a program to search files for a substring is published without revealing the substring. The " limited diffusion " approach proposed in a previous article is described. Design criteria for a Boolean function to be used in the limited diffusion algorithm are stated, and a function meeting the criteria is proposed. An algorithm for b...

Assistive devices are a key aspect in wearable systems for biomedical applications, as they represent potential aids for people with physical and sensory disabilities that might lead to improvements in the quality of life. This chapter focuses on wearable assistive devices for the blind. It intends to review the most significant work done in this area, to present the latest approaches for assis...

OBJECTIVE In recent years, a growing number of studies have focused on the olfactory abilities of blind individuals as well as their tactile and auditory senses. In this study, we aimed to investigate possible alterations in the sense of smell in early- and late-blind subjects as compared with sighted controls, using a Sniffin' Sticks test battery. STUDY DESIGN Prospective clinical study. S...

abstract background and aim: visual impairment affects people's quality of life. since the effect of rehabilitation services is measured by improving in quality of life, this study was performed to evaluate the effect of rehabilitation services on quality of life in the blind. materials and methods: 121 blind and low vision people who covered by zahedan welfare organization were studied by...

We present a study about the use of current electronic travel aids to help blind people navigate through familiar and unfamiliar environments. We also discuss the main strengths and weaknesses of electronic travel aids and propose guidelines to design and use them adequately. We provide a proposal to develop and use traveling aids. As a result, this can be a first step towards defining major as...

In this work, we investigate how using the haptic channel as a complement to the audio/vocal one can provide better support for the use of mobile museum guides for blind users. The aim is to improve autonomy and social integration of blind visitors. Based on our previous experience in mobile guide design, the proposed solution aims to add tactile feedback enhancement for orientation support and...

In 2005, Lee et al. proposed a blind signature scheme based on the discrete-logarithm problem to achieve the untraceability or unlinkability property. However, the scheme will be demonstrated as not being secure in this manuscript. We design an attack on the scheme such that a signature requester can obtain more than one valid signatures by performing only one round of the protocol. It violates...

Linear block codes can be applied in spatial and/or temporal diversity receivers in order to develop high performance schemes for blind equalization in mobile communications. The proposed technique uses the structure of the encoded transmitted information (with redundancy) to achieve equalization schemes based on a deterministic criterion. Simulations show that the proposed technique is more ef...