Hostname: page-component-848d4c4894-ttngx Total loading time: 0 Render date: 2024-05-22T04:25:07.336Z Has data issue: false hasContentIssue false
  • English
  • Français

Comments on the Use of Digital Filters

Published online by Cambridge University Press:  14 March 2018

Scott D. Walck
Scott D. Walck*
Affiliation:
PPG Industries, Inc.
*
SWalck@dashfast.com

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

At the Microscopy and Microanalysis 2003 meeting, a member of the audience in one talk sharply criticized a speaker of a talk for his use of a Savitsky-Golay (S-G) digital filter for smoothing Electron Energy Loss Spectroscopy (EELS) data. The statement was made that the digital filter would decrease the resolution of the peak, i.e. widen the width, and that all digital filters do that, including the Top Hat filter. In support of this statement, he said to consider what would happen if the filter were applied to a Dirac delta function. I knew that his argument was not correct, but I didn't think of the reason until later. This interchange was on my mind because I was familiar with both of these filters due to implementing both the Top Hat and the Savitsky-Golay filters into my “Beerware” program, EELS-PLOT.

Type
Research Article
Information
Microscopy Today , Volume 12 , Issue 4 , July 2004 , pp. 42 - 47
Copyright
Copyright © Microscopy Society of America 2004

References

Endnotes

1 Savitsky, A. and |Golay, M. J. E., Anal. Chem., 36, pp. 1627-39, (1964)CrossRefGoogle Scholar.

2 Steiner, J., Termonia, Y., J. Deltour, Anal. Chem., 44, pp. 1906-9, (1972)CrossRefGoogle Scholar

3 Madden, H. H., Anal. Chem., 50. pp. 1383-6, (1976).CrossRefGoogle Scholar

4 The Top-Hal filter is described in most XEDS software package manuals. I used the technical reference manual for vhe Koran Vantage system. I also benefited from discussions with Fred Schiimber and he was kind Enough to send me several of his reprints on the topic.

5 EELS-Plot is a Microsoft Visual Basic 6.0 EELS and XEDS program lhat works with MSA formatted spectra in a Microsoft Windows platform. It is downloadable from the EMMPDL library at the following web site, http://www.amc.anl.gov/ANLSoftwareLibrary/02-EMMPDL/EELS/EELSPIot/.