Method and apparatus for compression of sar images

H - Electricity – 04 – N

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H04N 7/26 (2006.01) G01S 13/90 (2006.01) G06T 5/00 (2006.01)

Patent

CA 2681700

A computer system 60 for compressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be compressed, and a processor 69 for compressing a SAR image from the database. The compressing includes applying an anisotropic diffusion algorithm to the SAR image, and compressing the SAR image after applying the anisotropic diffusion algorithm thereto. Applying the anisotropic diffusion algorithm includes determining noise in the SAR, selecting a noise threshold for the SAR image based on the determined noise, and mathematically adjusting the anisotropic diffusion algorithm based on the selected noise threshold.

Un système informatique (60) de compression d'images de radar à synthèse d'ouverture (SAR) comprend une base de données de stockage d'images SAR à compresser et un processeur (69) de compression d'une image SAR provenant de la base de données. L'opération de compression consiste à appliquer un algorithme par diffusion anisotrope à l'image SAR et à compresser l'image SAR après y avoir appliqué l'algorithme par diffusion anisotrope. L'application de l'algorithme par diffusion anisotrope consiste à déterminer le bruit dans le SAR, à sélectionner un seuil de bruit pour l'image SAR à partir du bruit déterminé et à adapter par procédé mathématique l'algorithme par diffusion anisotrope à partir du seuil de bruit sélectionné.

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