Improvement of the legibility of bathymetric pictures with a monodimensional wavelet packet filter

Author

Quivouron, C. ; Quinquis, A. ; Voisset, M.

Author_Institution

ENSIETA, Brest, France

Volume

3

fYear

2001

fDate

2001

Firstpage

1648

Abstract

The French Institute of Research for the Sea Exploitation (IFREMER) uses the multibeam sounder SIMRAD EM12 to build a morphological and sedimentary cartography of seafloors. Produced maps help geologists to understand the various processes that formed the lithosphere. A method to filter bathymetric data is given to improve the legibility of morphological maps of the seabed made from information collected by the sounder. After a pre-processing that eliminates unknown or unrealistic soundings, data are filtered to remove the artefacts brought about by incorrectly appreciated ship motion and also to minimize the noise effects, with a monodimensional wavelet packet filter

Keywords

bathymetry; digital filters; oceanographic techniques; sonar imaging; Dual Multibeam Echo Sounder; IFREMER; SIMRAD EM12; bathymetric data filter; bathymetric picture improvements; monodimensional wavelet packet filter; morphological maps; multibeam sounder; noise effects; pre-processing; seabed; seafloor; sedimentary cartography; ship motion; Acoustic beams; Acoustic noise; Geology; Information filtering; Information filters; Interference; Marine vehicles; Sea floor; Signal processing; Wavelet packets;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS, 2001. MTS/IEEE Conference and Exhibition

Conference_Location

Honolulu, HI

Print_ISBN

0-933957-28-9

Type

conf

DOI

10.1109/OCEANS.2001.968079

Filename

968079