Removing DC offset and de-noising for inspecting signal based on mathematical morphology filter processing

Jianning Yang; Jun Sun; Jun Ni

doi:10.1117/12.819740

31 December 2008 Removing DC offset and de-noising for inspecting signal based on mathematical morphology filter processing

Jianning Yang, Jun Sun, Jun Ni

Author Affiliations +

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 713050 (2008) https://doi.org/10.1117/12.819740
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

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.

Citation Download Citation

Jianning Yang, Jun Sun, and Jun Ni "Removing DC offset and de-noising for inspecting signal based on mathematical morphology filter processing", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 713050 (31 December 2008); https://doi.org/10.1117/12.819740

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