Prof. Xiaotao Huang Profile

Prof. Xiaotao Huang

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Proceedings Article | 11 October 2023 Paper

Multi-angle SAR image registration based on Demons

Maixue Chen, Dong Feng, Liang Shen, Xiaotao Huang

Proceedings Volume 12800, 1280056 (2023) https://doi.org/10.1117/12.3004015

KEYWORDS: Image registration, Synthetic aperture radar, Deformation, Distortion, Rigid registration, Image processing, Signal to noise ratio, Image restoration, Remote sensing

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The inconsistent geometric distortion of Synthetic Aperture Radar (SAR) images when detecting from different angles makes multi-angle SAR image registration difficult. In this paper, the Demons algorithm, a non-rigid grey-scale based registration algorithm, is used for the first time in multi-angle SAR image registration. The algorithm calculates the displacement offset of the image to be aligned which influenced by the difference between the grey-scale of the reference image and the image to be aligned as well as the gradient of the reference image. Then Demons iteratively optimizes the offset through smooth interpolation with a Gaussian filter to ensure that image is accurately aligned. Three sets of SAR multi-angle images of different mountainous areas are used for experimental validation, and the analysis is carried out from both qualitative and quantitative metrics. The results show the Demons algorithm is more effective and more accurate than other non-rigid registration algorithms.

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