Exploiting redundancy in color-polarization filter array images for dynamic range enhancement

Color-polarization filter array (CPFA) sensors are able to capture linear polarization and color information in a single shot. For a scene that contains a high dynamic range of irradiance and polarization signatures, some pixel values approach the saturation and noise levels of the sensor. The most...

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Bibliographic Details
Published in:Optics letters 2020-10, Vol.45 (19), p.5530-5533
Main Author: Lapray, Pierre-Jean
Format: Article
Language:English
Subjects:
Analyzers
Color
Dynamic range
Engineering Sciences
Image enhancement
Image filters
Irradiance
Linear polarization
Noise levels
Optics
Photonic
Pixels
Qualitative analysis
Redundancy
Sensor arrays
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Summary:Color-polarization filter array (CPFA) sensors are able to capture linear polarization and color information in a single shot. For a scene that contains a high dynamic range of irradiance and polarization signatures, some pixel values approach the saturation and noise levels of the sensor. The most common CPFA configuration is overdetermined, and contains four different linear polarization analyzers. Assuming that not all pixel responses are equally reliable in CPFA channels, one can therefore apply the high dynamic range imaging scheme to improve the Stokes estimation from a single CPFA image. Here I present this alternative methodology and show qualitative and quantitative results on real data.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.398258