Head-operated computer accessibility tools (CATs) are useful solutions for the ones with complete head control; but when it comes to people with only reduced head control, computer access becomes a very challenging task since the users depend on a single head-gesture like a head nod or a head tilt to interact with a computer. It is obvious that any new interaction technique based on a single head-gesture will play an important role to develop better CATs to enhance the users’ self-sufficiency and the quality of life. Therefore, we proposed two novel interaction techniques namely HeadCam and HeadGyro within this study. In a nutshell, both interaction techniques are based on our software switch approach and can serve like traditional switches by recognizing head movements via a standard camera or a gyroscope sensor of a smartphone to translate them into virtual switch presses. A usability study with 36 participants (18 motor-impaired, 18 able-bodied) was also conducted to collect both objective and subjective evaluation data in this study. While HeadGyro software switch exhibited slightly higher performance than HeadCam for each objective evaluation metrics, HeadCam was rated better in subjective evaluation. All participants agreed that the proposed interaction techniques are promising solutions for computer access task.

头部操作的计算机辅助工具（CAT）对于具有完全头部控制的工具是有用的解决方案；但是对于只有很少的头部控制的人，计算机访问成为一项非常具有挑战性的任务，因为用户需要依靠单个头部手势（例如头部点头或头部倾斜）来与计算机交互。显而易见，任何基于单个手势的新交互技术都将在开发更好的CAT以增强用户的自给自足和生活质量方面发挥重要作用。因此，在这项研究中，我们提出了两种新颖的交互技术，即HeadCam和HeadGyro。简而言之，两种交互技术都基于我们的软件开关方法，并且可以像传统开关一样通过通过标准相机或智能手机的陀螺仪传感器识别头部运动来将其转换为虚拟开关按下来发挥作用。还进行了一项针对36位参与者（18位运动障碍，18位身体健全）的可用性研究，以收集本研究中的客观和主观评估数据。尽管HeadGyro软件交换机在每个客观评估指标上的性能都比HeadCam略高，但HeadCam在主观评估中的评分更高。所有参与者都同意，所提出的交互技术是解决计算机访问任务的有希望的解决方案。在这项研究中，还进行了18次健全的评估）以收集客观和主观评估数据。尽管HeadGyro软件交换机在每个客观评估指标上的性能都比HeadCam略高，但HeadCam在主观评估中的评分更高。所有参与者都同意，所提出的交互技术是解决计算机访问任务的有希望的解决方案。在这项研究中，还进行了18次健全的评估）以收集客观和主观评估数据。尽管HeadGyro软件交换机在每个客观评估指标上的性能都比HeadCam略高，但HeadCam在主观评估中的评分更高。所有参与者都同意，所提出的交互技术是解决计算机访问任务的有希望的解决方案。