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Combining phase and energy detection with mathematical morphology in dual time-frequency representation leads to improved SSP noise robustness

Authors :
Serge Jacquey
Michel Grevillot
J.J. Meyer
Christophe Cudel
Modélisation, Intelligence, Processus et Système (MIPS)
Ecole Nationale Supérieure d'Ingénieur Sud Alsace-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-IUT de Colmar-IUT de Mulhouse
Source :
Ultrasonics, Ultrasonics, Elsevier, 2001, 39 (4), pp.291-296. ⟨10.1016/S0041-624X(01)00061-0⟩
Publication Year :
2001

Abstract

International audience; In this paper a fusion algorithm for the detection of specular echoes blurred by coloured Gaussian noise is proposed. The phase and energy criteria, characteristic of these echoes, are handled separately. First, the detection capabilities of split spectrum (phase) and short time Fourier transform spectrogram (energy) are compared theoretically and experimentally. Second, the new algorithm based on mathematical morphology operators using both time-frequency representations is proposed. In the last part our method is shown to be more robust than absolute minimisation split spectrum processing.

Details

ISSN :
0041624X
Volume :
39
Issue :
4
Database :
OpenAIRE
Journal :
Ultrasonics
Accession number :
edsair.doi.dedup.....254dc0fd4d4c88dc91d477555d1bf76e
Full Text :
https://doi.org/10.1016/S0041-624X(01)00061-0⟩