Jitter is an inevitable by-product of gaze detection. Because of this, gaze typing tends to be a slow and frustrating process. In this paper, we propose SliceType, a soft keyboard that is optimized for gaze input. Our main design objective is to use the screen area more efficiently by allocating a larger area to the target keys. We achieve this by determining the keys that will not be used for the next input, and allocating their space to the adjacent keys with a merging animation. Larger keys are faster to navigate towards, and easy to dwell on in the presence of eye tracking jitter. As a result, the user types faster and more comfortably. In addition, we employ a word completion scheme that complements gaze typing mechanics. A character and a related prediction is displayed at each key. Dwelling at a key enters the character, and double-dwelling enters the prediction. While dwelling on a key to enter a character, the user reads the related prediction effortlessly. The improvements provided by these features are quantified using the Fitts’ law. The performance of the proposed keyboard is compared with two other soft keyboards designed for gaze typing, Dasher and GazeTalk. Thirty seven novice users gaze-typed a piece of text using all three keyboards. The results of the experiment show that the proposed keyboard allows faster typing, and is more preferred by the users.

中文翻译：

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SliceType：使用合并键盘快速注视打字

抖动是注视检测不可避免的副产品。因此，注视打字往往是一个缓慢而令人沮丧的过程。在本文中，我们提出了SliceType，这是一种针对注视输入进行了优化的软键盘。我们的主要设计目标是通过为目标按键分配更大的区域来更有效地使用屏幕区域。我们通过确定将不用于下一个输入的键，并通过合并动画将其空间分配给相邻键来实现此目的。较大的按键可以更快地导航，并且在存在眼动跟踪抖动的情况下也易于停留。结果，用户更快，更舒适地键入。另外，我们采用了一个单词完成方案来补充注视打字机制。在每个键处显示一个字符和相关的预测。住一键输入字符，然后将双居住宅纳入预测。当停留在用于输入字符的键上时，用户毫不费力地读取相关的预测。这些功能所提供的改进可使用菲茨定律进行量化。拟议的键盘的性能与另外两种专为凝视打字设计的软键盘Dasher和GazeTalk进行了比较。三十七名新手用户使用全部三个键盘凝视了一段文本。实验结果表明，所提出的键盘可以加快打字速度，并为用户所青睐。拟议的键盘的性能与另外两种专为凝视打字设计的软键盘Dasher和GazeTalk进行了比较。三十七名新手用户使用全部三个键盘凝视了一段文本。实验结果表明，所提出的键盘可以加快打字速度，并为用户所青睐。拟议的键盘的性能与另外两种专为凝视打字设计的软键盘Dasher和GazeTalk进行了比较。三十七名新手用户使用全部三个键盘凝视了一段文本。实验结果表明，所提出的键盘可以加快打字速度，并为用户所青睐。