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Update: 2012/03/01
| Author | Title | Year | Journal/Proceedings | Reftype | DOI/URL |
|---|---|---|---|---|---|
| Duval, L. | Compression de données sismiques : bancs de filtres et transformèes étendues, synthèse et adaptation | 2000 | School: Université Paris-Sud Orsay | phdthesis | PDF-1 PDF-2 URL1 URL2 |
| Abstract: Les algorithmes les plus souvent employés pour la compression de données sismiques utilisent des transformées en ondelettes ou en paquets d'ondelettes. Les coefficients issus de la transformation sont généralement quantifiés puis codés par les techniques classiques de codage entropique. Nous proposons ici un premier algorithme de compression basé sur la transformée en ondelettes. Cette transformation est assortie d'une technique de codage de type zerotree coding, d'emploi original en sismique. Cependant, l'emploi des transformées en ondelettes classiques reste une approche relativement rigide. Or, il est souvent souhaitable de pouvoir adapter les transformées aux propriétés de chaque type de signaux. Nous proposons donc un deuxième algorithme employant, à la place des ondelettes, un ensemble de transformées dites «transformées étendues». Ces transformées, issues de la théorie des bancs de filtres, sont paramétrées. Les LOT (lapped orthogonal transforms) de H. Malvar ou les GenLOT (generalized lapped orthogonal transforms) de de Queiroz et al. en sont des exemples connus. Nous proposons plusieurs critères d'optimisation de ces paramètres, permettant de construire des «transformées étendues» adaptées aux propriétés des signaux sismiques. Nous montrons que ces transformées peuvent être utilisées avec codage des coefficients analogue à un codage arborescent employé pour les ondelettes. Les deux algorithmes de compression proposés possèdent pour avantages la possibilité de choisir précisément le taux de compression des données, de comprimer les données par blocs (dans le cas des transformées étendues) et de pouvoir décomprimer partiellement les données, pour le contrôle-qualité ou la visualisation. Les performances des deux algorithmes proposées sont testées sur un ensemble de données sismiques réelles. Ces performances sont évaluées pour différentes mesures de qualité. Nous comparons également leurs performances à d'autres algorithmes de compression. | |||||
BibTeX:
@phdthesis{Duval_L_2000_phd_com_dsbftesa,
author = {Duval, L.},
title = {Compression de données sismiques : bancs de filtres et transformèes étendues, synthèse et adaptation},
school = {Université Paris-Sud Orsay},
year = {2000},
abstract = {Les algorithmes les plus souvent employés pour la compression de données
sismiques utilisent des transformées en ondelettes ou en paquets
d'ondelettes. Les coefficients issus de la transformation sont généralement
quantifiés puis codés par les techniques classiques de codage entropique.
Nous proposons ici un premier algorithme de compression basé sur
la transformée en ondelettes. Cette transformation est assortie d'une
technique de codage de type zerotree coding, d'emploi original en
sismique. Cependant, l'emploi des transformées en ondelettes classiques
reste une approche relativement rigide. Or, il est souvent souhaitable
de pouvoir adapter les transformées aux propriétés de chaque type
de signaux. Nous proposons donc un deuxième algorithme employant,
à la place des ondelettes, un ensemble de transformées dites «transformées
étendues». Ces transformées, issues de la théorie des bancs de filtres,
sont paramétrées. Les LOT (lapped orthogonal transforms) de H. Malvar
ou les GenLOT (generalized lapped orthogonal transforms) de de Queiroz
et al. en sont des exemples connus. Nous proposons plusieurs critères
d'optimisation de ces paramètres, permettant de construire des «transformées
étendues» adaptées aux propriétés des signaux sismiques. Nous montrons
que ces transformées peuvent être utilisées avec codage des coefficients
analogue à un codage arborescent employé pour les ondelettes. Les
deux algorithmes de compression proposés possèdent pour avantages
la possibilité de choisir précisément le taux de compression des
données, de comprimer les données par blocs (dans le cas des transformées
étendues) et de pouvoir décomprimer partiellement les données, pour
le contrôle-qualité ou la visualisation. Les performances des deux
algorithmes proposées sont testées sur un ensemble de données sismiques
réelles. Ces performances sont évaluées pour différentes mesures
de qualité. Nous comparons également leurs performances à d'autres
algorithmes de compression.},
note = {(Seismic data compression)}
}
|
|||||
| Duval, L. & Røsten, T. | Filter bank decomposition of seismic data with application to compression and denoising | 2000 | SEG Annual International Meeting, pp. 2055-2058 | inproceedings | DOI URL PDF |
| Abstract: The use of discrete wavelet based analysis, feature extraction, denoising, and compression methods have led to extremely interesting developments in the field of seismic data processing. Notwithstanding, discrete wavelets belong to a wider class of filter banks. The use of more general filter banks allows the design of filter coefficients matching the signal's properties. Consequently, general filter banks bring forth the performance of discrete wavelet based seismic data processing techniques. In this paper, we discuss basics of general filter bank theory, and its applications to seismic data compression and denoising. We show that properly designed filter banks are able to outperform discrete wavelets in both instances. |
|||||
BibTeX:
@inproceedings{Duval_L_2000_p-seg_fil_bdsdacd,
author = {Duval, L. and Røsten, T.},
title = {Filter bank decomposition of seismic data with application to compression and denoising},
booktitle = {SEG Annual International Meeting},
publisher = {Soc. Expl. Geophysicists},
year = {2000},
pages = {2055--2058},
url = {http://dx.doi.org/10.1190/1.1815847},
doi = {http://dx.doi.org/10.1190/1.1815847}
}
|
|||||
| Duval, L.C. | Simultaneous seismic compression and denoising using a lapped transform coder | 2002 | Vol. 2, Proc. Int. Conf. Acoust. Speech Signal Process. (ICASSP), pp. 1269-1272 |
inproceedings | DOI PDF |
| Abstract: Compression and denoising are two of the most successful applications of wavelets to signals and natural images. Both techniques have also been successfully applied to seismic signals, but compression is not widely accepted yet, since it is often believed to harm seismic information. Trying to look at compression and denoising in another direction, this work stresses on the idea that they could be viewed as two sides of the same coin. As a result, in the case of naturally noisy seismic data, compression could be seen as a denoising tool, instead of a mere noise source. We substantiate this statement on a noise-free seismic data model and actual seismic field data. We show that, depending on the amount of initial ambient noise in the data, a lapped transform coder with embedded zerotree coding may be able to effectively denoise seismic data, over a wide range of compression ratios | |||||
BibTeX:
@inproceedings{Duval_L_2002_p-icassp_sim_scdltc,
author = {Duval, L. C.},
title = {Simultaneous seismic compression and denoising using a lapped transform coder},
booktitle = {Proc. Int. Conf. Acoust. Speech Signal Process. (ICASSP)},
year = {2002},
volume = {2},
pages = {1269--1272},
doi = {http://dx.doi.org/10.1109/ICASSP.2002.5744033}
}
|
|||||
| Duval, L.C. & Bui-Tran, V. | Compression denoising: using seismic compression for uncoherent noise removal | 2001 | Proc. EAGE Conf. Tech. Exhib. | inproceedings | URL PDF |
| Abstract: Wavelet related techniques have been proved successful in many seismic processing applications, such as filtering or compression. While seismic data compression is not yet widely accepted, we propose a compression based on filter banks as a means to remove uncoherent noise from seismic data, and thus improve the SNR. Results are demonstrated on synthetic data. |
|||||
BibTeX:
@inproceedings{Duval_L_2001_p-eage_com_dscunr,
author = {Duval, L. C. and Bui-Tran, V.},
title = {Compression denoising: using seismic compression for uncoherent noise removal},
booktitle = {Proc. EAGE Conf. Tech. Exhib.},
publisher = {European Assoc. Geoscientists Eng.},
year = {2001},
url = {http://earthdoc.eage.org/detail.php?pubid=4506}
}
|
|||||
| Duval, L.C. & Bui-Tran, V. | Compression de données sismiques par ondelettes et GenLOT [BibTeX] |
1999 | Réunion théoriciens circuits langue française, pp. 23-24 | inproceedings | |
BibTeX:
@inproceedings{Duval_L_1999_p-rtclf_com_dsog,
author = {Duval, L. C. and Bui-Tran, V.},
title = {Compression de données sismiques par ondelettes et GenLOT},
booktitle = {Réunion théoriciens circuits langue française},
year = {1999},
pages = {23--24}
}
|
|||||
| Duval, L.C., Bui-Tran, V., Nguyen, T.Q. & Tran, T.D. | Seismic data compression using GenLOT: towards "optimality" | 2000 | Proc. Data Compression Conf., pp. 552 | inproceedings | DOI PDF |
| Abstract: Seismic data compression is desirable in geophysics for both storage and transmission stages. Wavelet coding methods have generated interesting developments, including a real-time field test trial in the North Sea in 1995. Previous work showed that GenLOT with basic optimization also outperforms state-of-the-art biorthogonal wavelet coders for seismic data. In this paper, we focus on the problem of filter bank optimization using various properties of seismic data. It is often desirable to evaluate the compression performance of a transform on a set of data using a priori objective measures, to reduce extensive testings by selecting only good a priori transforms, and to tailor transforms to the statistical properties of the data set. In the scope of this work, we use symmetric AR models up to order 4 to obtain an average model of the horizontal and vertical signals of a seismic stack section. Rosten et al. (1999), have already shown that order 1 or 2 models give good results in filter bank optimization for non-unitary filter banks, using coding gain optimization. Several other criteria may be used for transform optimization. Following the theory in Tran and Nguyen (1999), we use a weighted combination of $C_o= k_C C_c C+k_S C_S+k_d C_D$ of coding gain, stopband attenuation and DC leakage minimization functions | |||||
BibTeX:
@inproceedings{Duval_L_2000_p-dcc_sei_dcgto,
author = {Duval, L. C. and Bui-Tran, V. and Nguyen, T. Q. and Tran, T. D.},
title = {Seismic data compression using GenLOT: towards "optimality"},
booktitle = {Proc. Data Compression Conf.},
year = {2000},
pages = {552},
doi = {http://dx.doi.org/10.1109/DCC.2000.838199}
}
|
|||||
| Duval, L.C., Bui-Tran, V., Nguyen, T.Q. & Tran, T.D. | GenLOT optimization techniques for seismic data compression | 2000 | Vol. 4, Proc. Int. Conf. Acoust. Speech Signal Process. (ICASSP), pp. 2111-2114 |
inproceedings | DOI PDF |
| Abstract: GenLOT coding has been shown an effective technique for seismic data compression, especially when compared to block-based algorithms (such as JPEG), or to wavelets. The transforms remove statistical redundancy and permit efficient compression, when used with advanced encoding techniques, such as the embedded zerotree coding framework. We derive a model for seismic data based on auto-regressive processes. This model is used to design GenLOT filter banks optimized for seismic data, using objective optimization criteria. | |||||
BibTeX:
@inproceedings{Duval_L_2000_p-icassp_gen_otsdc,
author = {Duval, L. C. and Bui-Tran, V. and Nguyen, T. Q. and Tran, T. D.},
title = {GenLOT optimization techniques for seismic data compression},
booktitle = {Proc. Int. Conf. Acoust. Speech Signal Process.},
year = {2000},
volume = {4},
pages = {2111--2114},
doi = {http://dx.doi.org/10.1109/ICASSP.2000.859252}
}
|
|||||
| Duval, L.C. & Galibert, P.-Y. | Efficient coherent noise filtering: an application of shift-invariant wavelet denoising | 2002 | Proc. EAGE Conf. Tech. Exhib. | inproceedings | URL PDF SLIDES |
| Abstract: Coherent noise or surface waves filtering represents one of the most complex issues in land seismic data processing. Wavelet based filtering has recently begun to challenge the popular and robust frequencywavenumber ($f-k_x-k_y$) filter. Wavelet filters provide fine time-scale representations and non linear filtering capabilities that yield in some instances better results on dispersive coherence noise. We propose in this work an improvement over the classical discrete wavelets filtering via the use of shift-invariant wavelets. Though relatively computationally expensive, their theoretical framework enables a closer approximation to the continuous wavelets, which results in finer filtering, less subject to aliasing and to wavelet ringing artifacts. Results are demonstrated on real seismic data sets. Improvements |
|||||
BibTeX:
@inproceedings{Duval_L_2002_p-eage_eff_cnfasiwd,
author = {Duval, L. C. and Galibert, P.-Y.},
title = {Efficient coherent noise filtering: an application of shift-invariant wavelet denoising},
booktitle = {Proc. EAGE Conf. Tech. Exhib.},
year = {2002},
url = {http://earthdoc.eage.org/detail.php?pubid=5867}
}
|
|||||
| Duval, L.C. & Nagai, T. | Seismic data compression using GULLOTS | 2001 | Vol. 3, Proc. Int. Conf. Acoust. Speech Signal Process. (ICASSP), pp. 1765-1768 |
inproceedings | DOI PDF |
| Abstract: Previous work has shown that GenLOT coding is a very effective technique for compressing seismic data. The role of a transform in a coder is to concentrate information and reduce statistical redundancy. When used with embedded zerotree coding, GenLOTs often provide superior performance to traditional block oriented algorithms or to wavelets. In this work we investigate the use of generalized unequal length lapped orthogonal transforms (GULLOT). Their shorter bases for high-frequency components are suitable for reducing ringing artifacts in images. While GULLOTs yield comparable performance to GenLOTs on smooth seismic signals like stacked sections, they achieve improved performance on less smooth signals such as shot gathers | |||||
BibTeX:
@inproceedings{Duval_L_2001_p-icassp_sei_dcgullot,
author = {Duval, L. C. and Nagai, T.},
title = {Seismic data compression using GULLOTS},
booktitle = {Proc. Int. Conf. Acoust. Speech Signal Process.},
year = {2001},
volume = {3},
pages = {1765--1768},
doi = {http://dx.doi.org/10.1109/ICASSP.2001.941282}
}
|
|||||
| Duval, L.C. & Nguyen, T.Q. | Seismic data compression: a comparative study between GenLOT and wavelet compression | 1999 | Vol. 3813, Proc. SPIE, Wavelets: Appl. Signal Image Process., pp. 802-810 |
inproceedings | DOI URL PDF |
| Abstract: Generalized Lapped Orthogonal Transform (GenLOT) based image coder is used to compress 2-D seismic data sets. Its performance is compared to the results using wavelet-based image coder. Both algorithms use the same state-of-the-art zerotree coding for consistency and fair comparison. Several parameters such as filter length and objective cost function are varied to find the best suited filter banks. It is found that for raw data, filter bank with long overlapping filters should be used for processing signals along the time direction whereas filter bank with short filters should be used for processing signal along the distance direction. This combination yields the best results. | |||||
BibTeX:
@inproceedings{Duval_L_1999_p-spie-wasip_sei_dccsbgwc,
author = {Duval, L. C. and Nguyen, T. Q.},
title = {Seismic data compression: a comparative study between GenLOT and wavelet compression},
booktitle = {Proc. SPIE, Wavelets: Appl. Signal Image Process.},
publisher = {SPIE},
year = {1999},
volume = {3813},
pages = {802--810},
url = {http://spie.org/x648.html?product_id=366837},
doi = {http://dx.doi.org/10.1117/12.366837}
}
|
|||||
| Duval, L.C., Nguyen, T.Q. & Tran, T.D. | On Progressive Seismic Data Compression using GenLOT | 1999 | Proc. Conf. Inform. Sciences Syst., pp. 956-959 | inproceedings | URL PDF |
| Abstract: Wavelet and subband coding have been shown effective techniques for seismic data compression, especially when compared to DCT-based algorithms (such as JPEG), which suffer from blocking artifact at low bit-rates. The transforms remove statistical redundancy and permit efficient compression. This paper presents a novel use of the Generalized Lapped Orthogonal |
|||||
BibTeX:
@inproceedings{Duval_L_1999_p-ciss_pro_sdcg,
author = {Duval, L. C. and Nguyen, T. Q. and Tran, T. D.},
title = {On Progressive Seismic Data Compression using GenLOT},
booktitle = {Proc. Conf. Inform. Sciences Syst.},
year = {1999},
pages = {956--959},
url = {http://thanglong.ece.jhu.edu/CISS/fa6.html}
}
|
|||||
| Duval, L.C., Nguyen, T.Q. & Tran, T.D. | Seismic data compression and QC using GenLOT | 1999 | Proc. EAGE Conf. Tech. Exhib., pp. P103 | inproceedings | URL PDF |
| Abstract: Modern seismic surveys with higher-precision numerization (24-bits A/D converters) have led to ever increasing amounts of seismic data. Management of these large datasets becomes critical, not only for transmission, but also for storage, processing and interpretation. Compression algorithms have been In this study we compare GenLOT with wavelet compression results. shot, CDP gathers and stack sections. |
|||||
BibTeX:
@inproceedings{Duval_L_1999_p-eage_sei_dcqcg,
author = {Duval, L. C. and Nguyen, T. Q. and Tran, T. D.},
title = {Seismic data compression and QC using GenLOT},
booktitle = {Proc. EAGE Conf. Tech. Exhib.},
publisher = {European Assoc. Geoscientists Eng.},
year = {1999},
pages = {P103},
url = {http://earthdoc.eage.org/detail.php?pubid=32003}
}
|
|||||
| Duval, L.C., Oksman, J. & Nguyen, T.Q. | A new class of filter banks for seismic data compression | 1999 | Vol. 18(1), SEG Annual International Meeting, pp. 1907-1910 |
inproceedings | DOI URL PDF |
| Abstract: Reducing the volume of seismic data would substantially improve the system management for both transmission and storage purposes. We propose in this paper a new class of filter banks (Gen- LOTs) for seismic data compression. GenLOT is a gen- eralization of local transforms with overlapping windows. The transforms are used in an embedded coding scheme, incorporating control quality features and allowing exact bit rate compression. Comparing GenLOTs with wavelet in seismic compres- sion, the simulation verifies that GenLOTs offer better performance than wavelets at a constant distorsion rate, achieving much higher compression ratios. Furthermore, coherent noise is reduced significantly in GenLOTs-based coder, and allowed compression of stack sections by com- pression ratio of $150 : 1$ without visible loss. |
|||||
BibTeX:
@inproceedings{Duval_L_1999_p-seg_new_cfbsdc,
author = {L. C. Duval and J. Oksman and T. Q. Nguyen},
title = {A new class of filter banks for seismic data compression},
booktitle = {Annual International Meeting},
publisher = {SEG, Soc. Expl. Geophysicists},
year = {1999},
volume = {18},
number = {1},
pages = {1907--1910},
url = {http://dx.doi.org/10.1190/1.1820920},
doi = {http://dx.doi.org/10.1190/1.1820920}
}
|
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Created by JabRef on 30/04/2011.