Angle of linear polarization images of outdoor scenes

Meridith Kathryn Kupinski, Christine Bradley, David Diner, Feng Xu, Russell A Chipman

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Observations from the Ground-based Multiangle SpectroPolarimetric Imager (GroundMSPI) are used to relate angle of linear polarization (AoLP) measurements to material properties and illumination conditions in sunlit outdoor environments. GroundMSPI is a push-broom spectropolarimetric camera with an uncertainty in degree of linear polarization (DoLP) of ±0.005. This polarimetric accuracy yields useful AoLP images even when the DoLP is less than 0.02. AoLP images are reported with respect to dependency on surface texture, surface orientation, albedo, and illumination conditions. Agreement with well-known principles of polarized light scattering is illustrated, and several special cases are described. Expected observations of AoLP tangential to surface orientation and AoLP perpendicular to the scattering plane are reported. Significant changes in the AoLP are observed from common variations in outdoor illumination conditions. Also, simple variants in material properties change the dominant polarized light scattering process and thus the AoLP. Measurement examples that isolate a 90 deg AoLP flip are shown for a sunny and cloudy day as well as an object of high and low albedo.

Original languageEnglish (US)
Article number082419
JournalOptical Engineering
Volume58
Issue number8
DOIs
StatePublished - Aug 1 2019

Fingerprint

linear polarization
Polarization
Lighting
illumination
Light polarization
albedo
Image sensors
Light scattering
polarized light
Materials properties
light scattering
textures
Textures
Cameras
cameras
Scattering

Keywords

  • angle of linear polarization
  • multiangle spectropolarimetric imager
  • polarimetric imaging
  • polarized light scattering

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

Cite this

Angle of linear polarization images of outdoor scenes. / Kupinski, Meridith Kathryn; Bradley, Christine; Diner, David; Xu, Feng; Chipman, Russell A.

In: Optical Engineering, Vol. 58, No. 8, 082419, 01.08.2019.

Research output: Contribution to journalArticle

Kupinski, Meridith Kathryn ; Bradley, Christine ; Diner, David ; Xu, Feng ; Chipman, Russell A. / Angle of linear polarization images of outdoor scenes. In: Optical Engineering. 2019 ; Vol. 58, No. 8.
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