Lapped Directional Transform: A New Transform for Spectral Image Analysis

Dietmar Kunz; Til Aach

doi:10.1109/ICASSP.1999.757580

Lapped Directional Transform: A New Transform for Spectral Image Analysis

Dietmar Kunz, Til Aach

Institut für Signalverarbeitung

Philips Research Laboratories

11 Zitate (Scopus)

Abstract

We propose a new real-valued lapped transform for 2D-signal and image processing. Lapped transforms are particularly useful in block-based processing, since their intrinsically overlapping basis functions reduce or prevent block artifacts. Our transform is derived from the modulated lapped transform (MLT), which, as a real-valued and separable transform like the Discrete Cosine Transform, does not allow to unambiguously identify oriented structures from modulus spectra. This is in marked contrast to the (complex-valued) Discrete Fourier Transform (DFT). The new lapped transform is real-valued, and at the same time allows unambiguous detection of spatial orientation. Furthermore, a fast algorithm for this transform exists. As an application example, we investigate the transform's performance in spectral approaches to image restoration and enhancement in comparison to the DFT.

Originalsprache	Englisch
Titel	1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258)
Seitenumfang	4
Band	6
Herausgeber (Verlag)	IEEE
Erscheinungsdatum	01.01.1999
Seiten	3433-3436
ISBN (Print)	0-7803-5041-3
DOIs	https://doi.org/10.1109/ICASSP.1999.757580
Publikationsstatus	Veröffentlicht - 01.01.1999
Veranstaltung	Proceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing - Phoenix, USA / Vereinigte Staaten Dauer: 15.03.1999 → 19.03.1999 Konferenznummer: 55225

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10.1109/ICASSP.1999.757580

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https://www.scopus.com/pages/publications/0032649412

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Kunz, D., & Aach, T. (1999). Lapped Directional Transform: A New Transform for Spectral Image Analysis. in 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258) (Band 6, S. 3433-3436). (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings; Band 6). IEEE. https://doi.org/10.1109/ICASSP.1999.757580

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title = "Lapped Directional Transform: A New Transform for Spectral Image Analysis",

abstract = "We propose a new real-valued lapped transform for 2D-signal and image processing. Lapped transforms are particularly useful in block-based processing, since their intrinsically overlapping basis functions reduce or prevent block artifacts. Our transform is derived from the modulated lapped transform (MLT), which, as a real-valued and separable transform like the Discrete Cosine Transform, does not allow to unambiguously identify oriented structures from modulus spectra. This is in marked contrast to the (complex-valued) Discrete Fourier Transform (DFT). The new lapped transform is real-valued, and at the same time allows unambiguous detection of spatial orientation. Furthermore, a fast algorithm for this transform exists. As an application example, we investigate the transform's performance in spectral approaches to image restoration and enhancement in comparison to the DFT.",

author = "Dietmar Kunz and Til Aach",

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Kunz, D & Aach, T 1999, Lapped Directional Transform: A New Transform for Spectral Image Analysis. in 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258). Bd. 6, ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, Bd. 6, IEEE, S. 3433-3436, Proceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing , Phoenix, Arizona, USA / Vereinigte Staaten, 15.03.99. https://doi.org/10.1109/ICASSP.1999.757580

Lapped Directional Transform: A New Transform for Spectral Image Analysis. / Kunz, Dietmar; Aach, Til.
1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258). Band 6 IEEE, 1999. S. 3433-3436 (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings; Band 6).

Publikation: Kapitel in Büchern/Berichten/Konferenzbänden › Konferenzbeitrag › Begutachtung

TY - GEN

T1 - Lapped Directional Transform: A New Transform for Spectral Image Analysis

AU - Kunz, Dietmar

AU - Aach, Til

N1 - Conference code: 55225

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We propose a new real-valued lapped transform for 2D-signal and image processing. Lapped transforms are particularly useful in block-based processing, since their intrinsically overlapping basis functions reduce or prevent block artifacts. Our transform is derived from the modulated lapped transform (MLT), which, as a real-valued and separable transform like the Discrete Cosine Transform, does not allow to unambiguously identify oriented structures from modulus spectra. This is in marked contrast to the (complex-valued) Discrete Fourier Transform (DFT). The new lapped transform is real-valued, and at the same time allows unambiguous detection of spatial orientation. Furthermore, a fast algorithm for this transform exists. As an application example, we investigate the transform's performance in spectral approaches to image restoration and enhancement in comparison to the DFT.

AB - We propose a new real-valued lapped transform for 2D-signal and image processing. Lapped transforms are particularly useful in block-based processing, since their intrinsically overlapping basis functions reduce or prevent block artifacts. Our transform is derived from the modulated lapped transform (MLT), which, as a real-valued and separable transform like the Discrete Cosine Transform, does not allow to unambiguously identify oriented structures from modulus spectra. This is in marked contrast to the (complex-valued) Discrete Fourier Transform (DFT). The new lapped transform is real-valued, and at the same time allows unambiguous detection of spatial orientation. Furthermore, a fast algorithm for this transform exists. As an application example, we investigate the transform's performance in spectral approaches to image restoration and enhancement in comparison to the DFT.

UR - https://www.scopus.com/pages/publications/0032649412

U2 - 10.1109/ICASSP.1999.757580

DO - 10.1109/ICASSP.1999.757580

M3 - Conference contribution

SN - 0-7803-5041-3

VL - 6

T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

SP - 3433

EP - 3436

BT - 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258)

PB - IEEE

T2 - Proceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing

Y2 - 15 March 1999 through 19 March 1999

ER -

Kunz D, Aach T. Lapped Directional Transform: A New Transform for Spectral Image Analysis. in 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258). Band 6. IEEE. 1999. S. 3433-3436. (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings). doi: 10.1109/ICASSP.1999.757580

Lapped Directional Transform: A New Transform for Spectral Image Analysis

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