| Paper: | IMDSP-P9.12 (ICASSP 2003 Paper) | ||
| Session: | Image and Multidimensional Signal Processing: Applications II | ||
| Time: | Thursday, May 20, 13:00 - 15:00 | ||
| Presentation: | Poster (ICASSP 2003 Presentation) | ||
| Topic: | Image and Multidimensional Signal Processing: Geophysical Signal, Image Processing | ||
| Title: | SIMULTANEOUS GROUP AND PHASE CORRECTION FOR THE ESTIMATION OF DISPERSIVE PROPAGATING WAVES IN THE TIME-FREQUENCY PLANE | ||
| Authors: | Antoine Roueff; Laboratoire des Images et des Signaux, Grenoble | ||
| Jérôme Mars; Laboratoire des Images et des Signaux, LIS | |||
| Jocelyn Chanussot; Laboratoire des Images et des Signaux, LIS | |||
| Helle Pederson; LGIT | |||
| Abstract: | This paper deals with seismic signal processing. We propose a new algorithm which performs the dispersion filter estimation using a linear array of geophones. This estimation enables a robust characterization and extraction of the dispersive propagating waves from a seismic profile. The novelty of ourmethod is the use of a simultaneous time delay and phase shiftcorrection in order to estimate the dispersion filter. The resulting algorithm is semi-automatic and requires very few input parameters. The main advantage of our algorithm is that the signals are analysed in the time-frequency domain using all sensors simultaneously while classical approches are either multi-sensor in the frequency domain or single sensor in the time-frequency domain. Validations on synthetic and real data show the reliability of the algorithm. | ||
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