Walter Correia

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When multimedia applications intend to support accessibility, aspects of usability must be reviewed to adapt or extend common functional requirements that are implemented to ensure an easy use of applications. Furthermore, these requirements must be identified and analyzed in a contextualized way, since different types of impairments require different types(More)
The current efforts to specify an usability guideline for accessible mobile applications are sparse and they are still far to present a concrete pattern. Our previous work carried out a broad survey to consolidate the findings of these efforts in a unique list with 36 requirements, 13 of them focused on vision impairments. In this paper we show the results(More)
Accessible tactile pictures (ATPs) consist of tactile representations that convey different kinds of messages and present information through the sense of touch. Traditional approaches use contours and patterns, which create a distinct and recognizable shape and enables separate objects to be identified. The success rate for recognizing pictures by touch is(More)
Differently of the Web Accessibility Guidelines, which are already consolidated as a reference, the initiatives to develop guidelines for accessible mobile applications are recent and several approaches present only suggestions rather than a concrete list of functional requirements. This work analyzed 247 scientific articles to identify requirements that(More)
The development of mobile applications that consider accessibility can uniquely make use of software extensions to provide special interfaces to people with impairments. However, such extensions are limited so that the use of external devices is a natural alternative. The current market provides several accessibility devices that can be coupled to mobile(More)