SwipeKey: 以 swipe 為基礎在智慧手錶上的文字輸入方式

Abstract

智慧手錶的興起,使得在小螢幕上的文字輸入成為了一個重要的研 究問題。由於智慧手錶的螢幕太小,所以在螢幕上做物件選擇或互動 時會產生相當的問題。在鍵盤設計上就必須要考慮不同的輸入方式, 提供較好的使用者體驗及輸入速度。在這篇論文研究中,我們提出 SwipeKey,使用滑動方向或點擊區分單一按鈕上的不同手勢,以在同 一個按鈕上產生多個字母的輸入可能。我們在這篇研究中考慮了一個 完整的設計流程,對智慧手錶的鍵盤設計提出了一套指導原則。並且 透過一系列的實驗,找出鍵盤參數的限制,最後提出合適的鍵盤設計。 接著將 SwipeKey 實際與過去的研究設計作比較實驗,結果顯示我們的 設計不管是在輸入速度 (WPM 增加 53%) 或是輸入錯誤率 (CER 從 10% 減少至 3.4%) 都有顯著的改進。而在使用者的體驗上,不管是在學習 困難度及使用偏好上都優於過去的方法。

The rise of smartwatches calls for efficient, convenient and suitable text input methods for these small computers. The minuscule size of these screens brings many challenges on how to interact with these devices. Keyboard de- sign requires optimization for these small screens to provide a good user expe- rience and fast text entry method on these devices. We introduce SwipeKey, a text input method that uses swipe directions to allow multiple inputs per but- ton and thus allows for an increase in the effective size of input buttons. We have conducted thorough experiments optimizing SwipeKey to create a fast, low-error, and easy to learn soft keyboard for smartwatches. These benefits result from having a keyboard that emphasizes the use of swipe motions. Our user study results show that with a specific combination of swipe directions and corresponding button size, SwipeKey users achieved a speed of 11 in words per minute (WPM), a 53% improvement from baseline (7.2 in WPM) and dramatically decreased character error rate (CER) from the baseline of 10% down to 3.4%.