title: Polarization-rich continuous wave direct imaging: modeling and visualization.
abstract: We report a study and comparison of continuous-wave, optical polarization difference imaging (PDI) and polarization modulation imaging (PMI) for imaging through scattering media. The problem is cast in the framework of a theoretical estimation, and the comparison is based on three visualization parameters, namely, the magnitude, the degree, and the orientation of the polarization. We show that PDI is superior in estimating the first two parameters in active imaging under specific conditions, while the PMI is suitable for passive imaging and is the only way to estimate polarization orientation. We also propose new schemes for rendering polarization information as a color image and for applying the newly introduced polarization-orientation imaging for segmentation. Simulation and experimental results verify the theoretical conclusions.
authors.affiliation: Department of Electrical Engineering, Indian Institute of Science, Bangalore, India. umeshrs@ee.iisc.ernet.in
authors.forename: R S
authors.initials: RS
authors.lastname: Umesh
authors.forename: A G
authors.initials: AG
authors.lastname: Ramakrishnan
authors.forename: R
authors.initials: R
authors.lastname: Srikanth
authors.forename: R
authors.initials: R
authors.lastname: Hema
authors.forename: S
authors.initials: S
authors.lastname: Divya
mesh_terms: D000465:Algorithms; D003124:Colorimetry / Q000379:methods*; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008859:Microscopy, Polarization / Q000379:methods*; D008954:Models, Biological; D015233:Models, Statistical; D009010:Monte Carlo Method; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014584:User-Computer Interface