Abstract
Vision-impaired students have several issues accessing mathematical documents, which are associated with representation of mathematical expressions and graphs of mathematical functions. Graphs of mathematical functions are visual presentations of mathematical information and useful to illustrate numerical or qualitative information, which are sometimes difficult or even impossible to describe. A graph is a picture that shows how sets of data are related to each other. Graphs of mathematical functions generally convey the intended message of a mathematical document. Therefore, access to graphs is essential in learning mathematics. Finding a solution to represent graphs of mathematical functions in an accessible format is necessary for the vision-impaired. This paper describes an approach to develop an application to address this issue by detecting, extracting and categorising important information from graphs of mathematical functions using three open source packages, namely, ImageMagick, GNUPLOT and Octave
Highlights
Results from the National Assessment of Educational Progress show that there is a great disparity between the mathematical skills of students with disabilities and students without disabilities (Noble, 2008)
Haptic feedback is used for guidance and assistance in graph navigation (Ramloll & Brewster, 2001)
The framework of a graph of mathematical functions contains two crossed axes, which meet at the origin
Summary
Results from the National Assessment of Educational Progress show that there is a great disparity between the mathematical skills of students with disabilities and students without disabilities (Noble, 2008). Accessibility of graphs of mathematical functions is one of the areas, which needs to be facilitated. Haptic feedback is used for guidance and assistance in graph navigation (Ramloll & Brewster, 2001). It is not efficient to present exact data values to the user. It is expensive and may take users some time to familiarize themselves with the new interface. The limitations of Haptic feedback devices hinder users’ ability to explore graphs (University of South Australia, 2004). There are two other methods to represent visual components such as graphs to vision-impaired, namely, tactile and audio method
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