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Kubecka L., Jan J., Kolar R., Jirik R.
Original Title
IMPROVING QUALITY OF AUTOFLUORESCENCE IMAGES USING NON-RIGID IMAGE REGISTRATION
Type
conference paper
Language
English
Original Abstract
This work concerns quality improvement of autofluorescence retinal images by averaging of non-rigidly registered images. The necessity of using the elastic spatial transformation model is documented as well as the need for similarity criterion capable of dealing with the nonhomogenous and variable illumination of retinal images. The presented multilevel registration algorithm provides parameters of primarily affine and then B-spline free-form spatial transformation optimal with respect to the mutual information similarity criterion. The registration was tested on three modeled image sets of 100 images. The difference of artificially introduced pre-deformation displacement field and the displacement field found by our algorithm clearly showed the ability to compensate for the diverse modeled distortions. Further, the registration algorithm was used for improving quality of realistic retinal images using averaging of registered frames of image sequences.
Key words in English
image registration, image averaging, noise suppression, affine transform, flexible trasnforms, retinal images
Authors
RIV year
2006
Released
15. 8. 2006
Publisher
Univ. of Pisa
Location
Florence (Italy)
Pages from
357
Pages to
361
Pages count
5
URL
knihovna ÚBMI FEKT VUT
BibTex
@inproceedings{BUT24213, author="Libor {Kubečka} and Jiří {Jan} and Radim {Kolář} and Radovan {Jiřík}", title="IMPROVING QUALITY OF AUTOFLUORESCENCE IMAGES USING NON-RIGID IMAGE REGISTRATION", booktitle="Proc. 14th European Signal Processing Conf. EUSIPCO 2006", year="2006", series="1", number="1", pages="5", publisher="Univ. of Pisa", address="Florence (Italy)", url="knihovna ÚBMI FEKT VUT" }