A Wavelet Packet Tree Denoising Algorithm for Images of Atomic-Force Microscopy

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

A threshold-free denoising procedure of acquired discrete Atomic-force microscopy (AFM) signals using the discrete wavelet transform (DWT) method is presented in this article. The integration of a denoising procedure into a control structure is extremely important for each kind of system to be controlled. The detection of unavoidable measurement noise in the acquired data of the AFM signal is done by using orthogonal wavelets (Daubechies and Symmlet) and with different polynomial approximation order for each family. The proposed denoising algorithm, based on the free wavelet toolboxes from the WaveLab 850 library of the Stanford University (USA), compares the usefulness of Daubechies and Symmlet wavelets with different vanishing moments. With the help of a seminorm the noise of a sequence is defined as a coherent and incoherent part of the AFM signal. In the first step of the procedure the algorithm analyzes the frequency subspaces of the wavelet packets tree and searches for small or opposing components in the wavelet domains. In the second step of the procedure the incoherent components in the low- and high frequency domains are localized and the incoherent is then removed from the AFM signal. The proposed algorithm structure is used to improve the quality of the AFM signals and it can be easily integrated into the existing AFM control hard- and software structures. The effectiveness of the proposed denoising algorithm is validated with real measurements.

OriginalspracheEnglisch
ZeitschriftAsian Journal of Control
Jahrgang20
Ausgabenummer4
Seiten (von - bis)1367-1378
Anzahl der Seiten12
ISSN1561-8625
DOIs
PublikationsstatusErschienen - 07.2018

DOI

Zuletzt angesehen

Publikationen

  1. Second language learners' performance in mathematics
  2. Practical guide to SAP Netweaver PI-development
  3. Implementing aspects of inquiry-based learning in secondary chemistry classes: a case study
  4. An interdisciplinary perspective on scaling in transitions
  5. Quantum Computing and the Analog/Digital Distinction
  6. Doing space in face-to-face interaction and on interactive multimodal platforms
  7. What would Colin say?
  8. Implementation of a Blended-Learning Course as Part of Faculty Development
  9. Increased auditor independence by external rotation and separating audit and non audit duties?
  10. Unveiling local knowledge
  11. Enhancing the structural diversity between forest patches — A concept and real-world experiment to study biodiversity, multifunctionality and forest resilience across spatial scales
  12. To settle or protect? A global analysis of net primary production in parks and urban areas
  13. Understanding needs embodiment
  14. Control of a two-thermoelectric-cooler system for ice-clamping application using Lyapunov based approach
  15. Schreiben in der Sekundarstufe II
  16. The new zeppelin university translation of weber's 'class, status, party'
  17. Schreibentwicklung in der Hochschule
  18. Efficiency
  19. How to evaluate effects of pesticides in terrestrial ecosystems
  20. The impact of digital transformation on the retailing value chain
  21. Unchanged food approach-avoidance behaviour of healthy men after oxytocin administration
  22. Systemnahe Programmierung
  23. Berufsidentität
  24. Gli endorsement
  25. Top-down social modulation of perception-action coupling
  26. Towards a comparative international history of dockers
  27. Linking modes of research to their scientific and societal outcomes. Evidence from 81 sustainability-oriented research projects
  28. A mixed-methods study of the impact of sociocultural adaptation on the development of pragmatic production
  29. Facilitative effects of introduced Pacific oysters on native macroalgae are limited by a secondary invader, the seaweed Sargassum muticum