Steven L. Jacques, Ph.D., Department of Electrical and Computer Engineering
Oregon Graduate Institute, Portland, Oregon, USA. email: jacquess@ohsu.edu, https://omlc.org

A prototype polarization camera.

Two images are acquires: one parallel and one perpendicular, based on how the polarizer in front of the camera is oriented. Then these two images are algebraically combined to yield a "POLARIZATION IMAGE".

equation

The numerator is sensitive to polarized light, rejects randomly polarized diffuse reflectance.

Normalization by the denominator cancels common attenuation due to melanin pigmentation.
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