Registration of plantar pressure images

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Francisco P. M. Oliveira (Author) Other; João Manuel R. S. Tavares (Author) FEUP

Journal

Title: International Journal for Numerical Methods in Biomedical Engineering

Vol. 28 No. 6-7

Pages: 589-603

ISSN: 2040-7939

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 8 Citations

ISI Web of Science

Scopus - 7 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: P-002-9AP

DOI: 10.1002/cnm.1461

Abstract (EN): In this work, five computational methodologies to register plantar pressure images are compared: (1) the first methodology is based on matching the external contours of the feet; (2) the second uses the phase correlation technique; (3) the third addresses the direct maximization of cross-correlation using the Fourier transform; (4) the fourth minimizes the sum of squared differences using the Fourier transform; and (5) the fifth methodology iteratively optimizes an intensity (dis)similarity measure based on Powell's method. The accuracy and robustness of the five methodologies were assessed by using images from three common plantar pressure acquisition devices: a Footscan system, an EMED system, and a light reflection system. Using the residual error as a measure of accuracy, all methodologies revealed to be very accurate even in the presence of noise. The most accurate was the methodology based on the iterative optimization, when the mean squared error was minimized. It achieved a residual error inferior to 0.01?mm and 0.6?mm for non-noisy and noisy images, respectively. On the other hand, the methodology based on image contour matching was the fastest, but its accuracy was the lowest. Copyright (c) 2011 John Wiley & Sons, Ltd.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15