A Learnable Color Correction Matrix for RAW Reconstruction


Anqi Liu (Shanghai University), Shiyi Mu (Shanghai University), Shugong Xu (Shanghai University)
The 35th British Machine Vision Conference
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Abstract

Autonomous driving algorithms usually employ sRGB images as model input due to their compatibility with the human visual system. However, visually pleasing sRGB images are possibly sub-optimal for downstream tasks when compared to RAW images. The availability of RAW images is constrained by the difficulties in collecting real-world driving data and the associated challenges of annotation. To address this limitation and support research in RAW-domain driving perception, we design a novel and ultra-lightweight RAW reconstruction method. The proposed model introduces a learnable color correction matrix (CCM), which uses only a single convolutional layer to approximate the complex inverse image signal processor (ISP). Experimental results demonstrate that simulated RAW (simRAW) images generated by our method provide performance improvements equivalent to those produced by more complex inverse ISP methods when pretraining RAW-domain object detectors, which highlights the effectiveness and practicality of our approach.

Citation

@inproceedings{Liu_2024_BMVC,
author    = {Anqi Liu and Shiyi Mu and Shugong Xu},
title     = {A Learnable Color Correction Matrix for RAW Reconstruction},
booktitle = {35th British Machine Vision Conference 2024, {BMVC} 2024, Glasgow, UK, November 25-28, 2024},
publisher = {BMVA},
year      = {2024},
url       = {https://papers.bmvc2024.org/0911.pdf}
}


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