Phase-extraction from fringe patterns is an inevitable procedure in the field of optical metrology and interferometry. However, speckle noise will introduce and influence the precision of wrapped phase map when a coherent light is used.
In this thesis, we use the bidimensional empirical mode decomposition (BEMD) to perform the speckle-reduction. Moreover, different interpolation method in BEMD will be used to compare their performance in speckle-reduction. Finally, the database will be developed to make the BEMD a robotic tool to reduce noises. And the database also points out that the performance of BEMD is highly related to the fringe period, the fringe visibility, and the SNR of speckle noise.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0831111-133335 |
| Date | 31 August 2011 |
| Creators | Chen, Ting-wei |
| Contributors | Ann-Kuo Chu, Wei-Hung Su, Chao-Kuei Lee, Yi-Jen Chiu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831111-133335 |
| Rights | user_define, Copyright information available at source archive |
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