Image contrast enhancement in angular domain optical imaging of turbid media

Imaging structures within a turbid medium using Angular Domain Imaging (ADI) employs an angular filter array to separate weakly scattered photons from those that are highly scattered. At high scattering coefficients, ADI contrast declines due to the large fraction of non-uniform background scattered...

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Bibliographic Details
Published in:Optics express 2008-12, Vol.16 (26), p.21492-21504
Main Authors: Vasefi, Fartash, Kaminska, Bozena, Chapman, Glenn H, Carson, Jeffrey J L
Format: Article
Language:English
Subjects:
Algorithms
Diagnostic Imaging - methods
Equipment Design
Image Enhancement - methods
Image Processing, Computer-Assisted
Light
Models, Statistical
Nephelometry and Turbidimetry - methods
Optical Fibers
Optics and Photonics
Photons
Scattering, Radiation
Silicon
Tomography, Optical - methods
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Summary:Imaging structures within a turbid medium using Angular Domain Imaging (ADI) employs an angular filter array to separate weakly scattered photons from those that are highly scattered. At high scattering coefficients, ADI contrast declines due to the large fraction of non-uniform background scattered light still within the acceptance angle. This paper demonstrates various methods to enhance the image contrast in ADI. Experiments where a wedge prism was used to deviate the laser source so that scattered photons could be imaged and subtracted from the image obtained by standard ADI provided the greatest improvement in image contrast.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.16.021492