Dr. Aldo I. Maalouf Profile

Dr. Aldo I. Maalouf

at Univ de Poitiers

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Proceedings Article | 2 October 2007 Paper

Clouds removal from remotely sensed images by using a bandelet-based reconstruction technique

Aldo Maalouf, Philippe Carré, Bertrand Augereau, Christine Fernandez-Maloigne

Proceedings Volume 6763, 67630L (2007) https://doi.org/10.1117/12.731426

KEYWORDS: Clouds, Wavelets, Image processing, Image classification, Wavelet transforms, Reconstruction algorithms, Lithium, Image segmentation, Remote sensing, Multispectral imaging

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The recurrent presence of clouds and clouds shadows in aerial or remotely sensed images is an awkward problem that severely limits the regular exploitations capability of these images. Removing cloud-contaminated portions of the image and then filling in the missing data represent an important photo editing cumbersome task. The intent of this work is to propose a technique for the reconstruction of areas obscured by clouds in a remotely sensed image. To this end, a new efficient reconstruction technique for missing data synthesis is presented. This technique is based on the Bandelet transform and the multiscale geometrical grouping. It consists of two steps. In the first step, the curves of geometric flow of different zones of the image are determined by using the Bandelet transform with multiscale grouping. This step allows a better representation of the multiscale geometry of the image's structures. Having well represented this geometry, the information inside the cloud-contaminated zone is synthesized by propagating the geometrical flow curves inside that zone. This step is accomplished by minimizing a functional whose role is to reconstruct the missing or cloud contaminated zone independently of the size and topology of the reconstruction or inpainting domain. Thus, the flow lines are well tied inside the cloud-contaminated zone. The proposed technique is illustrated with some examples on processing multispectral aerial images. The obtained results are compared with those obtained by other clouds removal techniques.

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