マイクロレンズアレイマーカを用いたハンズフリーポインティングシステム

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タイトル別名
  • Hands-free Pointing System Using a Microlens Array Marker
  • マイクロレンズアレイマーカ オ モチイタ ハンズフリーポインティング システム

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抄録

People with upper limb disabilities often need to use auxiliary equipment or alternative input methods to operate personal computers. Instead of using a traditional mouse, they may employ methods that use a numeric keypad supported by a function of MouseKeys, manipulate a joystick or trackball using their residual abilities, or use a mouth stick or head stick to control the mouse. Each of these methods requires a lot of time and effort. In this report, the authors propose a new pointing method that uses a high-precision visual marker (ArrayMark) developed in the robotic field. The marker uses a microlens array and overcomes the primary problem confronted by conventional markers: reduced pose-estimation precision in frontal observations. A user mounts the marker on the head and turns the face toward the display. The proposed system estimates head position and pose, and synchronizes a cursor with facial direction. In precision experiments, when an able-bodied subject fixed his face toward a target for 3.3 seconds at a distance of 700 mm, the standard deviation error for the cursor coordinates was within 1.7 mm. The times required for pointing when using the proposed method, mouse, and MouseKeys were compared. The proposed method took 1.8 times more time than the mouse and 0.36 times less time than the MouseKeys.

収録刊行物

  • 生体医工学

    生体医工学 53 (1), 44-49, 2015

    公益社団法人 日本生体医工学会

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