Publication result detail

IMPROVING QUALITY OF AUTOFLUORESCENCE IMAGES USING NON-RIGID IMAGE REGISTRATION

Kubecka L., Jan J., Kolar R., Jirik R.

Original Title

IMPROVING QUALITY OF AUTOFLUORESCENCE IMAGES USING NON-RIGID IMAGE REGISTRATION

English Title

IMPROVING QUALITY OF AUTOFLUORESCENCE IMAGES USING NON-RIGID IMAGE REGISTRATION

Type

Paper in proceedings (conference paper)

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.

English 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

Kubecka L., Jan J., Kolar R., Jirik R.

Released

15.08.2006

Publisher

Univ. of Pisa

Location

Florence (Italy)

Book

Proc. 14th European Signal Processing Conf. EUSIPCO 2006

Edition

1

Pages from

357

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"
}