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Institute of Electrical and Electronics Engineers, IEEE Transactions on Geoscience and Remote Sensing, 12(53), p. 6650-6662, 2015

DOI: 10.1109/tgrs.2015.2445632

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An Approach to Fine Coregistration Between Very High Resolution Multispectral Images Based on Registration Noise Distribution

Journal article published in 2015 by Youkyung Han ORCID, Francesca Bovolo, Lorenzo Bruzzone
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Even after applying effective coregistration methods, multitemporal images are likely to show a residual misalignment, which is referred to as registration noise (RN). This is because coregistration methods from the literature cannot fully handle the local dissimilarities induced by differences in the acquisition conditions (e.g., the stability of the acquisition platform, the off-nadir angle of the sensor, the structure of the considered scene, etc.). This paper addresses the problem of reducing such a residual misalign-ment by proposing a fine automatic coregistration approach for very high resolution (VHR) multispectral images. The proposed method takes advantage of the properties of the residual misalign-ment itself. To this end, RN is first extracted in the change vector analysis (CVA) polar domain according to the behaviors of the specific multitemporal images considered. Then, a local analysis of RN pixels (i.e., those showing residual misalignment) is conducted for automatically extracting control points (CPs) and matching them according to their estimated displacement. Matched CPs are used for generating a deformation map by interpolation. Finally, one VHR image is warped to the coordinates of the other through a deformation map. Experiments carried out on simulated and real multitemporal VHR images confirm the effectiveness of the proposed approach. Index Terms—Change vector analysis (CVA), image coregistra-tion, registration noise (RN), remote sensing, very high resolution (VHR) multispectral images.