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Proceedings Paper

Digital Registration Techniques For Sequential Fundus Images
Author(s): Dah Jye Lee; Thomas F. Krile; Sunanda Mitra
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Paper Abstract

Precise registration techniques are essential for quantitative evaluation of sequential fundus images to make early detection of fundus anomalies feasible. The familiar correlation techniques for achieving such image registration are computationally intensive and suffer from non-uniqueness of solution. We have developed an accurate, yet fast, algorithm for image registration by using a combination of power spectrum and power cepstrum analyses. In this new algorithm rotational shifts and translational shifts are corrected separately. The technique involves two main ideas. First, a rotational shift is corrected and changed into a translational shift by computing Fourier power spectrums. After the rotational shift has been corrected, i.e., images are parallel, the remaining translational shifts are handled. Because of the accuracy characteristics of the power cepstrum and the speed of the-FFT, this new algorithm can work very fast and accurately compared to conventional techniques. Also, the cepstrum technique has better tolerance of image noise than the traditional correlation measures. The accuracy obtained and computational time required for the cepstrum-based registration techniques will be illustrated by operating on sequential fundus images used in early detection of glaucoma.

Paper Details

Date Published: 18 January 1988
PDF: 8 pages
Proc. SPIE 0829, Applications of Digital Image Processing X, (18 January 1988); doi: 10.1117/12.942139
Show Author Affiliations
Dah Jye Lee, Texas Tech University (United States)
Thomas F. Krile, Texas Tech University (United States)
Sunanda Mitra, Texas Tech University (United States)

Published in SPIE Proceedings Vol. 0829:
Applications of Digital Image Processing X
Andrew G. Tescher, Editor(s)

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