Toward an Improved Haptic Zooming Algorithm for Graphical Information Accessed by Individuals who are Blind and Visually Impaired
Toward an Improved Haptic Zooming Algorithm for Graphical Information Accessed by Individuals who are Blind and Visually Impaired
复制标题
针对盲人和视障人士访问图形信息的改进触觉缩放算法
作者：
Ravi Rastogi;D. Pawluk
在学校、工作和日常生活中使用的越来越多的信息内容以图形形式呈现。不幸的是，对于盲人或视力受损的人来说，访问这些信息是很困难的，尤其是在需要许多图表的时候。一个问题是，即使在相对简单的可视化图表中，细节也很难通过触摸来感知。对于手动创建的触觉图，这些细节通常在单独的图中呈现，这些图必须从其他图中选择。能够主动放大单个图表的某个区域，以便以合理的尺寸呈现细节，以供用户进行探索，这似乎是一种更简单的方法。然而，直接使用视觉缩放方法在触觉上有一定的局限性。因此，提出了一种新的缩放方法来避免这些缺陷。进行了一个初步的实验，以检查该算法与不使用缩放相比的有用性。结果表明，正确回答的数量随着开发的缩放算法而提高，参与者发现它比不使用缩放来探索地板地图更有用。
An increasing amount of information content used in school, work, and everyday living is presented in graphical form. Unfortunately, it is difficult for people who are blind or visually impaired to access this information, especially when many diagrams are needed. One problem is that details, even in relatively simple visual diagrams, can be very difficult to perceive using touch. With manually created tactile diagrams, these details are often presented in separate diagrams which must be selected from among others. Being able to actively zoom in on an area of a single diagram so that the details can be presented at a reasonable size for exploration purposes seems a simpler approach for the user. However, directly using visual zooming methods have some limitations when used haptically. Therefore, a new zooming method is proposed to avoid these pitfalls. A preliminary experiment was performed to examine the usefulness of the algorithm compared to not using zooming. The results showed that the number of correct responses improved with the developed zooming algorithm and participants found it to be more usable than not using zooming for exploration of a floor map.