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Proceedings Paper

Determination of speckle fringe orientation map by image sequence and removing the speckle noise from speckle fringe patterns
Author(s): Qifeng Yu; Xiangyi Sun; Sihua Fu
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Paper Abstract

Removing speckle noise in electronic speckle pattern interferometry (ESPI) from a single speckle fringe pattern while keeping the fringe features is a difficult problem. The spin filtering with curved surface windows proposed by the authors is successful to filter out speckle noise nearly completely from a single speckle fringe pattern. However the new filtering has a difficulty to be overcome that the speckle fringe orientation map (SFOM) depends on the processing window size which is tryout and is difficult to be derived correctly when the speckle fringe density changes considerably. In this paper we utilize the original speckle pattern sequence with one-beam setup to determine the speckle movement direction field by digital correlation methods so that the SFOM is determined from the direction field. In this way the SFOM can be derived regardless of fringe density.

Paper Details

Date Published: 22 May 2003
PDF: 6 pages
Proc. SPIE 5011, Machine Vision Applications in Industrial Inspection XI, (22 May 2003); doi: 10.1117/12.473972
Show Author Affiliations
Qifeng Yu, National Univ. of Defense Technology (China)
Xiangyi Sun, National Univ. of Defense Technology (China)
Sihua Fu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 5011:
Machine Vision Applications in Industrial Inspection XI
Martin A. Hunt; Jeffery R. Price, Editor(s)

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