LOW VISION AID FOR OBSERVERS WITH CENTRAL VISION LOSSES

为中央视力丧失的观察者提供低视力辅助设备

• 批准号: 3497163
• 负责人: TERI A LAWTON
• 金额: $ 5万
• 依托单位: NANO TECH SERVICES
• 依托单位国家: 美国
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-26 至 1991-10-25
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3497163
• 关键词: computer program /software; human subject; image enhancement; reading; television; vision aid; vision disorders

DESCRIPTION (Investigator's Abstract): The low vision aid developed during this study will provide an electronic device to help visually impaired persons maximize the use of their residual vision, using innovative image enhancement filters that will be available commercially as an option on current closed-circuit TV (CCTV) readers. These filters enhance text by optimizing the low vision observer's remaining contrast sensitivity, and render the text in shades of gray that are more easily perceived than black and white. The objective of Phase I is to determine whether the improved reading performance of low vision observers found when viewing static words presented one at a time in the middle of the screen, extends to continuous text that is scrolled across the screen at different speeds, as used on CCTVs. The specific aims of Phase I are to: 1) Implement the software needed to: generate text using the same format used on CCTVs and 2) Measure whether the reading rates of low vision observers are improved when reading moving continuous filtered text, when compared to unfiltered text having the same magnification. When the feasibility of this project is shown at the end of Phase I, then Phase II funding will be used to conduct all the research needed to determine the optimum hardware configuration for building a commercially available cost-effective device to significantly improve the reading performance of low vision observers.

描述（研究者摘要）：低视力辅助器是在 这项研究将提供一种电子设备，以帮助视力受损者， 人们最大限度地利用他们的残余视力，使用创新的形象， 增强过滤器，将作为一个选项， 目前闭路电视（CCTV）阅读器。 这些过滤器通过以下方式增强文本 优化所述低视力观察者的剩余对比敏感度，以及 以比黑色更容易感知的灰色阴影呈现文本 和白色。 第一阶段的目标是确定改进后的 低视力观察者在观察静态单词时的阅读表现 在屏幕中间一次呈现一个，延伸到连续 以不同速度在屏幕上滚动的文本，如 闭路电视 第一阶段的具体目标是：1）实施软件 需要：使用CCTV上使用的相同格式生成文本，以及2） 测量低视力观察者的阅读率是否得到改善， 阅读移动连续过滤文本，与未过滤文本相比 具有相同的放大率。 当该项目的可行性 第一阶段结束时，第二阶段的资金将用于 确定最佳硬件配置所需的所有研究， 构建一种商业上可用的具有成本效益的设备， 改善低视力观察者的阅读性能。