title: Image contrast enhancement in angular domain optical imaging of turbid media.
abstract: 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.
authors.affiliation: The School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada. fartash@ieee.org
authors.forename: Fartash
authors.initials: F
authors.lastname: Vasefi
authors.forename: Bozena
authors.initials: B
authors.lastname: Kaminska
authors.forename: Glenn H
authors.initials: GH
authors.lastname: Chapman
authors.forename: Jeffrey J L
authors.initials: JJ
authors.lastname: Carson
mesh_terms: D000465:Algorithms; D003952:Diagnostic Imaging / Q000379:methods; D004867:Equipment Design; D007089:Image Enhancement / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D008027:Light; D015233:Models, Statistical; D009391:Nephelometry and Turbidimetry / Q000379:methods; D055100:Optical Fibers; D055095:Optics and Photonics; D017785:Photons; D012542:Scattering, Radiation; D012825:Silicon; D041622:Tomography, Optical / Q000379:methods
chemical_list: D012825:Silicon