Title:
BODY-MOVEMENT DETECTION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2014/136415
Kind Code:
A1
Abstract:
[Problem] To detect body movement in a radiographic image, with high precision, regardless of the imaging conditions and the subject. [Solution] A contrast computation unit (24) detects contrast in a high-frequency component of a converted radiographic image (G0) and contrast in a low-frequency component of said radiographic image (G0) by detecting contrast in the gradient directions of edge portions in analysis regions centered on a plurality of analysis points set by an analysis-point setting unit (23). For each gradient direction, a ratio computation unit (25) computes the ratio between the contrast in the high-frequency component and the contrast in the low-frequency component. A determination unit (26) uses the smallest ratios as indices that represent body movement and uses the result of a statistical process performed on the indices for the plurality of analysis points to determine whether or not body movement was present when the radiographic image (G0) was taken. A display control unit (27) displays the result of that determination on a display unit (40).
Inventors:
KAWAMURA TAKAHIRO (JP)
Application Number:
PCT/JP2014/001095
Publication Date:
September 12, 2014
Filing Date:
February 28, 2014
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
A61B6/00; G06V10/44
Foreign References:
| JP2008220414A | 2008-09-25 | |||
| JP2012075862A | 2012-04-19 | |||
| JP2013102850A | 2013-05-30 |
Attorney, Agent or Firm:
YANAGIDA, Masashi et al. (JP)
Seiji Yanagida (JP)
Seiji Yanagida (JP)
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