14 November 1996 Contrast control for sonar pictures
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During the sonar image acquisition, several physical phenomena degrade the final picture a lot. We examine particularly two damages: the energy loss function of the distance covered by the acoustical wave and the speckle noise. For the first phenomenon, we suggest a corrective post processing which takes some acquisition parameters into account. For the second phenomenon, we apply filtering algorithms like the maximum a posteriori filter, a modified version of the Lee algorithm or an adaptive weighted median filter. The results are shown on real sonar images.
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Francoise Schmitt, Francoise Schmitt, Laurent Bonnaud, Laurent Bonnaud, Christophe Collet, Christophe Collet, } "Contrast control for sonar pictures", Proc. SPIE 2847, Applications of Digital Image Processing XIX, (14 November 1996); doi: 10.1117/12.258269; https://doi.org/10.1117/12.258269

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