Title:
CONTACT DETECTOR AND CONTACT DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2007/105640
Kind Code:
A1
Abstract:
A tapping counter (1) is a detector for detecting contact of a finger tip (20) with
a plate (30), and comprises a photography section (11) for photographing the
finger tip (20) and the plate (30), a distance measuring section (13) for measuring
a first time series variation in distance from the finger tip (20) to the plate
(30) based on the positions thereof in an image photographed at the photography
section (11), a high-pass filter (14) for extracting time series variation in
frequency components of the cut-off frequency or above among the first time series
variation measured at the distance measuring section (13) as second time series
variation, and a section (15) for detecting contact of the finger tip (20) with
the plate (30) when the second time series variation extracted by the high-pass
filter (14) exceeds a threshold.
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Inventors:
ISHII IDAKU (JP)
YAMAMOTO KENKICHI (JP)
YAMAMOTO KENKICHI (JP)
Application Number:
PCT/JP2007/054690
Publication Date:
September 20, 2007
Filing Date:
March 09, 2007
Export Citation:
Assignee:
NAT UNIVERSITY OF CORP HIROSHI (JP)
ISHII IDAKU (JP)
YAMAMOTO KENKICHI (JP)
ISHII IDAKU (JP)
YAMAMOTO KENKICHI (JP)
International Classes:
H03K17/96; G01B11/00; G01L5/00; G06F3/042
Other References:
IKEDA S. ET AL.: "Kosoku Shikaku o Mochiita Yubisaki Tapping Interface", JAPAN SOCIETY OF MECHANICAL ENGINEERS CONFERENCE ON ROBOTICS AND MECHATRONICS KOEN RONBUNSHU, 26 May 2006 (2006-05-26), pages 1P1-D18(1) - 1P1-D18(3), XP003017785
YAMAMOTO K. ET AL.: "Kosoku Vision o Mochiita Jitsujikan Yubisaki Tapping Interface", THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS D, vol. J90-D, no. 2, 1 February 2007 (2007-02-01), pages 544 - 555, XP003017786
TSUKADA K. AND YASUMURA M.: "Ubi-Finger Mobile Shiko Gesture Nyuryoku Device no Kenkyu", TRANSACTIONS OF INFORMATION PROCESSING SOCIETY OF JAPAN, vol. 43, no. 12, 15 December 2002 (2002-12-15), pages 3675 - 3684, XP003017787
YAMAMOTO K. ET AL.: "Kosoku Vision o Mochiita Jitsujikan Yubisaki Tapping Interface", THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS D, vol. J90-D, no. 2, 1 February 2007 (2007-02-01), pages 544 - 555, XP003017786
TSUKADA K. AND YASUMURA M.: "Ubi-Finger Mobile Shiko Gesture Nyuryoku Device no Kenkyu", TRANSACTIONS OF INFORMATION PROCESSING SOCIETY OF JAPAN, vol. 43, no. 12, 15 December 2002 (2002-12-15), pages 3675 - 3684, XP003017787
Attorney, Agent or Firm:
HASEGAWA, Yoshiki et al. (Ginza First Bldg. 10-6, Ginza 1-chom, Chuo-ku Tokyo 61, JP)
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