PIDSR: Complementary Polarized Image Demosaicing and Super-Resolution

Shuangfan Zhou; Chu Zhou; Youwei Lyu; Heng Guo; Zhanyu Ma; Boxin Shi; Imari Sato

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arXiv · 2504.07758

PIDSR: Complementary Polarized Image Demosaicing and Super-Resolution

Shuangfan Zhou·Chu Zhou·Youwei Lyu·Heng Guo·Zhanyu Ma·Boxin Shi·Imari Sato

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Abstract

Polarization cameras can capture multiple polarized images with different polarizer angles in a single shot, bringing convenience to polarization-based downstream tasks. However, their direct outputs are color-polarization filter array (CPFA) raw images, requiring demosaicing to reconstruct full-resolution, full-color polarized images; unfortunately, this necessary step introduces artifacts that make polarization-related parameters such as the degree of polarization (DoP) and angle of polarization (AoP) prone to error. Besides, limited by the hardware design, the resolution of a polarization camera is often much lower than that of a conventional RGB camera. Existing polarized image demosaicing (PID) methods are limited in that they cannot enhance resolution, while polarized image super-resolution (PISR) methods, though designed to obtain high-resolution (HR) polarized images from the demosaicing results, tend to retain or even amplify errors in the DoP and AoP introduced by demosaicing artifacts. In this paper, we propose PIDSR, a joint framework that performs complementary Polarized Image Demosaicing and Super-Resolution, showing the ability to robustly obtain high-quality HR polarized images with more accurate DoP and AoP from a CPFA raw image in a direct manner. Experiments show our PIDSR not only achieves state-of-the-art performance on both synthetic and real data, but also facilitates downstream tasks.

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BibTeX RIS

Shuangfan Zhou, Chu Zhou, Youwei Lyu, Heng Guo, Zhanyu Ma, Boxin Shi, Imari Sato. 2025-04-22. PIDSR: Complementary Polarized Image Demosaicing and Super-Resolution. https://arxiv.org/abs/2504.07758

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