通过光标视觉上下文提高低视力图表的可访问性
Improving Low-Vision Chart Accessibility via On-Cursor Visual Context
AI总结：
本文提出两种基于指针的交互方法，通过提供视觉上下文提高低视力者访问图表的能力，同时平衡视觉负荷。
摘要：
尽管广泛应用，图表对低视力者（LVI）而言仍然难以访问。阅读图表需要在全局上下文中查看数据点，这对可能依赖放大或有部分视野的LVI来说很困难。我们旨在通过提供视觉访问关键上下文来改善探索。为此，我们与五名LVI进行了形成性研究。我们确定了四种在不同图表类型中普遍存在的基本上下文元素：坐标轴、图例、网格线和概览。我们提出了两种基于指针的交互方法来提供这种上下文：动态上下文，一种新的聚焦+上下文交互，以及迷你地图，它将概览+细节原则适应于LVI。在N=22名LVI的测试中，我们比较了这两种方法并评估了它们与现有工具的整合。我们的结果表明，动态上下文对访问性、可用性和努力减少有显著积极影响；然而，加剧了视觉负荷。迷你地图增强了空间理解，但在此任务中不如其他方法受欢迎。我们提供了设计见解，以指导未来支持LVI的视觉上下文系统的发展，同时平衡视觉负荷。
英文摘要：
Despite widespread use, charts remain largely inaccessible for Low-Vision Individuals (LVI). Reading charts requires viewing data points within a global context, which is difficult for LVI who may rely on magnification or experience a partial field of vision. We aim to improve exploration by providing visual access to critical context. To inform this, we conducted a formative study with five LVI. We identified four fundamental contextual elements common across chart types: axes, legend, grid lines, and the overview. We propose two pointer-based interaction methods to provide this context: Dynamic Context, a novel focus+context interaction, and Mini-map, which adapts overview+detail principles for LVI. In a study with N=22 LVI, we compared both methods and evaluated their integration to current tools. Our results show that Dynamic Context had significant positive impact on access, usability, and effort reduction; however, worsened visual load. Mini-map strengthened spatial understanding, but was less preferred for this task. We offer design insights to guide the development of future systems that support LVI with visual context while balancing visual load.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
