Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
REFERENCE POSITION DETECTION DEVICE AND REFERENCE POSITION DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/087331
Kind Code:
A1
Abstract:
This reference position detection device is provided with an acquisition unit, an extraction unit, an identification unit, and a detection unit. The acquisition unit acquires image data representing an image obtained by imaging a keyboard and an object on the keyboard. The extraction unit extracts image data corresponding to an area which includes white keys but not black keys from the image data acquired by the acquisition unit. The identification unit identifies the object on the keyboard on the basis of the luminance value of the image data extracted by the extraction unit. The detection unit detects, for the object identified by the identification unit, a reference position which has a prescribed positional relationship on the keyboard.

Inventors:
WATANABE DAICHI (JP)
Application Number:
PCT/JP2017/039578
Publication Date:
May 09, 2019
Filing Date:
November 01, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
YAMAHA CORP (JP)
International Classes:
G10H1/18; G06T7/70
Foreign References:
JP4389841B22009-12-24
JP2014063265A2014-04-10
JP2009122753A2009-06-04
JP2007240929A2007-09-20
Attorney, Agent or Firm:
FUKUSHIMA, Yoshito (JP)
Download PDF: