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TitleCorrection for spatial averaging in laser speckle contrast analysis
Publication TypeJournal Article
Year of Publication2011
AuthorsThompson, O., Andrews M.K., and Hirst E.
JournalBiomedical Optics Express
Pagination1021 - 1029
Date Published2011
ISSN21567085 (ISSN)
Keywordscomputer simulation, Dynamic speckle, Factor analysis, Laser speckle contrast analysis, Linear corrections, Pixel size, Spatial averaging, Speckle
AbstractPractical laser speckle contrast analysis systems face a problem of spatial averaging of speckles, due to the pixel size in the cameras used. Existing practice is to use a system factor in speckle contrast analysis to account for spatial averaging. The linearity of the system factor correction has not previously been confirmed. The problem of spatial averaging is illustrated using computer simulation of time-integrated dynamic speckle, and the linearity of the correction confirmed using both computer simulation and experimental results. The valid linear correction allows various useful compromises in the system design. © 2011 Optical Society of America.

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