Optica Publishing Group

Fourier-domain filtering analysis for color-polarization camera demosaicking

Version 3 2024-04-01, 17:10
Version 2 2024-03-18, 20:59
Version 1 2024-03-18, 20:59
Posted on 2024-04-01 - 17:10
We review Fourier-domain methods for demosaicking Bayer-filter color cameras and monochrome polarization cameras, and then generalize the approach for the quad-Bayer filter mosaic, and for color polarization cameras. For each of these four mosaic filter types, we provide theoretical expressions for the sampling functions, the Fourier-domain channels, and the linear combination of reconstructed channels (the demosaicking algorithm) needed to estimate the input (pre-sampled) image. A useful advantage of the Fourier-domain approach is that it provides a direct means of visualizing and quantifying when aliasing is likely or unlikely to be present. For the Bayer and quad-Bayer filter types, we provide simulated images, while for the polarization camera types we provide experimental images and videos to illustrate the algorithm.


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Applied Optics


Nathan Hagen
Thijs Stockmans
Yukitoshi Otani
Prathan Buranasiri
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