Image analysis – Applications – Biomedical applications
Reexamination Certificate
2008-07-01
2011-10-25
Song, Hoon (Department: 2882)
Image analysis
Applications
Biomedical applications
C378S062000
Reexamination Certificate
active
08045772
ABSTRACT:
A system for comparing dental X-ray images includes a positional displacement calculator calculating a positional displacement between dental X-ray test and reference images by using phase-only correlation, a positional displacement corrector correcting the positional displacement, a base point extractor defining, as a base image, any one of the dental X-ray test and reference images, and defining, as a corresponding image, the other one of the two dental images, and extracting base points from the base image, a corresponding point extractor extracting corresponding points, which correspond to the base points, from the corresponding image, a correspondence calculator calculating correspondence between the base points and the corresponding points, a nonlinear distortion corrector correcting a nonlinear distortion between the base image and the corresponding image, based on the correspondence, and a similarity calculator finding, by using phase-only correlation, a similarity between the base image and the corresponding image.
REFERENCES:
patent: 7027650 (2006-04-01), Williame et al.
patent: 7245753 (2007-07-01), Squilla et al.
Akira Nikaido et al., “A High-Accuracy Dental Radiograph Registration Algorithm Using Phase-Only Correlation”, 22ndSIP Symposium of IEICE Technical Group on Signal Processing, pp. 694-699, published on Nov. 7, 2007.
TM Lehmann et al., “Computer-based registration for digital subtraction in dental radiology”, Dentomaxillofacial Radiology (2000) 29, pp. 323-346.
Aoki Takafumi
Ito Koichi
Kosuge Eiko
Kosuge Eiko
NDQ&M Watchstone LLP
Song Hoon
Tohoku University
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