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Image change detection using copulas

Zeng, Xuexing and Durrani, T.S. (2008) Image change detection using copulas. In: 9th International Conference on Signal Processing, 2008. IEEE, pp. 909-913. ISBN 978-1-4244-2178-7

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Abstract

This paper explores a new class of measures for the detection of changes in images, specially for images acquired from different classes of sensors such as synthetic aperture radar (SAR) systems or computerized axial tomography (CAT) systems, monitoring patients. The problems become very challenging as the local statistics may be different even though the observations in the images may be similar. By exploiting this similarity new approaches are proposed for change detection. Based on the assumption that some form of dependence exists between the images, this dependence can be modeled by copulas. By using the conditional copula and the second image to simulate the distribution of first image, the dependence between the two images may be more closely modeled by the ensuing joint distribution. As a follow on, the symmetrical Kullback-Leibler distance can be used to obtain the change indicator between the distributions associated with the two images. In this paper the conditional copula is used as a change detector and applied to scenes from two distinct and different image families -SAR and CAT, and its performance compared with that of conventional change detection algorithms, based on a pixel based difference measure and on local pixel statistics.

Item type: Book Section
ID code: 14867
Keywords: computerised tomography, medical image processing, object detection, patient monitoring, synthetic aperture radar, computerized axial tomography, copulas, image change detection, symmetrical Kullback-Leibler distance, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 14 Sep 2010 14:19
    Last modified: 07 Dec 2013 07:23
    URI: http://strathprints.strath.ac.uk/id/eprint/14867

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