Journal of Korea Multimedia Society (한국멀티미디어학회논문지)

Korea Multimedia Society (한국멀티미디어학회)
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A Study on Dynamic Adaptation of Soft Keyboard Using Adjacent-Typo

인접-오타를 이용한 소프트 키보드의 동적 적응 연구

  • Ko, Seokhoon (Institute of Information and Industrial Engineering, Hankuk University of Foreign Studies)
  • Received : 2018.09.16
  • Accepted : 2018.10.23
  • Published : 2018.11.30
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Abstract

Dynamic adaptation method is an effective technique to enhance the usability by personalizing the soft keyboard layout using the user's key input information. In this paper, we propose a dynamic adaptation method of a keyboard by automatically extracting typos from key input information and using adjacent-typo information classified through the relationship between typos. This technique does not limit a range of adaptation to the inside of the key but extends the range to the neighbor key so that the adaptation effect can be achieved in a wide range at a high speed, thereby the proposed method improves the usability of the keyboard with a small number of inputs. The proposed method showed 25% increase in usability compared to the existing method through experiment and it was confirmed that usability improves up to 33% when used with the existing method.

Keywords

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Fig. 2. Process of dynamic adaptation of soft keyboard using adjacent-typo.

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Fig. 3. Two examples of typo extracting from key stroke sequence. (a) Single backspace and (b) Multiple backspaces.

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Fig. 4. Two types of typo. (a) ktypo = 'l', kcorrect = 'n' and (b) ktypo = 'r', kcorrect = 't'.

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Fig. 5. Two examples of dynamic adaptation process. (a) Normal case and (b) Blocked by anchor case.

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Fig. 6. Soft keyboard test app.

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Fig. 7. Two result cases of adaptation affecting typos. (a) Assist case and (b) Prevent case.

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Fig. 8. Layout of the keyboard with adaptation through experiments(key-target area divided by color) (a) Adapted key layout of correct-adapt method and (b) Adapted key layout of typo-adapt method.

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Fig. 1. (a) Himberg's adaptive numeric keypad (from [7]; copyright ACM) and (b) Go's bubble-shaped CATKey after adaptation process (from [8]; copyright Springer).

Table 1. The average ratio of assist and prevent in-cidence for each adaptation method

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