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Proceedings Paper

Removing DC offset and de-noising for inspecting signal based on mathematical morphology filter processing
Author(s): Jianning Yang; Jun Sun; Jun Ni
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Paper Abstract

A new signal processing method based on the theory of mathematical morphology filter for Removing DC offset and noise pollution about the on-site sampled data is proposed. Conclusion that the ratio of the signal numerical frequency to length of flat structuring element determines the attenuation magnitude of signal and the principia of length of flat structuring element has been found, by analyzing inhesion meaning of base operation of mathematical morphology and then making up combination morphological filter with Maragos type of open-close and close-open. This method possesses following advantages: high calculation speed, easy implementation of hardware and better use value. The arithmetic is simulated with Matlab software and then transplanted to DSP hardware platform and practiced in on-site. It is proved that the proposed method can deal with the sampled data corrupted by on-site noise and the DC of set efficiently. Also, the processed results can meet the requirement in real time well.

Paper Details

Date Published: 31 December 2008
PDF: 7 pages
Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 713050 (31 December 2008); doi: 10.1117/12.819740
Show Author Affiliations
Jianning Yang, Jiangsu Univ. (China)
Jun Sun, Jiangsu Univ. (China)
Jun Ni, Jiangsu Univ. (China)

Published in SPIE Proceedings Vol. 7130:
Fourth International Symposium on Precision Mechanical Measurements
Yetai Fei; Kuang-Chao Fan; Rongsheng Lu, Editor(s)

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