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Assistive Pointing Device Based on a Head-Mounted Camera

机译：基于头戴式摄像机的辅助定点装置

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摘要

This paper introduces and validates the performance of an alternative input device for people with limited hand/arm movement and control. A summary is provided of the current state of the art in alternative input devices. Based on this, a low-cost solution is proposed that allows for 1) low latency and high operating speed and accuracy, 2) use from different viewing angles without recalibration, and 3) the ability to seamlessly control multiple devices. A prototype of this system was built and tested to determine the accuracy of the system (using a pan–tilt system), and to analyze the performance of the system compared to the state of the art (through user tests, based on the ISO 9241–411 test). The proposed system allows for great accuracy ( σX=0.28 px,σY=0.29 px,σXY=0.02 px), a decent performance compared to the state of the art (throughput = 1.52 bits/s, error rate = 31%), and good results in the ISO 9241-411 independent rating scale. The results from the performed experiments show that the proposed system leads great promise in real-world applications. A low-cost head-mounted camera could be used as an alternative human interface device for people with limited hand/arm movement and control, allowing them to participate in the ongoing trend of computing devices gaining importance in our everyday activities.
机译：本文介绍并验证了针对手/手臂运动和控制受限的人的替代输入设备的性能。提供了替代输入设备中的当前技术水平的概述。基于此，提出了一种低成本解决方案，该解决方案允许1）低等待时间，高操作速度和准确性； 2）从不同视角使用而无需重新校准； 3）无缝控制多个设备的能力。构建并测试了该系统的原型，以确定系统的准确性（使用云台系统），并与现有技术进行比较以分析系统的性能（通过基于ISO 9241的用户测试） –411测试）。所提出的系统具有很高的精度（σX= 0.28 px，σY= 0.29 px，σXY= 0.02 px），与现有技术相比性能不错（吞吐量= 1.52位/秒，错误率= 31％），并且在ISO 9241-411独立评级量表中取得良好结果。进行的实验结果表明，所提出的系统在实际应用中具有广阔的前景。对于手/手臂运动和控制受限的人们，低成本的头戴式摄像头可以用作替代的人机界面设备，使他们能够参与计算机设备在我们日常活动中变得越来越重要的不断发展的趋势。

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