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Low-Light Image Enhancement with Wavelet-Based Diffusion Models

Published: 05 December 2023 Publication History

Abstract

Diffusion models have achieved promising results in image restoration tasks, yet suffer from time-consuming, excessive computational resource consumption, and unstable restoration. To address these issues, we propose a robust and efficient Diffusion-based Low-Light image enhancement approach, dubbed DiffLL. Specifically, we present a wavelet-based conditional diffusion model (WCDM) that leverages the generative power of diffusion models to produce results with satisfactory perceptual fidelity. Additionally, it also takes advantage of the strengths of wavelet transformation to greatly accelerate inference and reduce computational resource usage without sacrificing information. To avoid chaotic content and diversity, we perform both forward diffusion and denoising in the training phase of WCDM, enabling the model to achieve stable denoising and reduce randomness during inference. Moreover, we further design a high-frequency restoration module (HFRM) that utilizes the vertical and horizontal details of the image to complement the diagonal information for better fine-grained restoration. Extensive experiments on publicly available real-world benchmarks demonstrate that our method outperforms the existing state-of-the-art methods both quantitatively and visually, and it achieves remarkable improvements in efficiency compared to previous diffusion-based methods. In addition, we empirically show that the application for low-light face detection also reveals the latent practical values of our method. Code is available at https://github.com/JianghaiSCU/Diffusion-Low-Light.

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    cover image ACM Transactions on Graphics
    ACM Transactions on Graphics  Volume 42, Issue 6
    December 2023
    1565 pages
    ISSN:0730-0301
    EISSN:1557-7368
    DOI:10.1145/3632123
    Issue’s Table of Contents
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    Publication History

    Published: 05 December 2023
    Published in TOG Volume 42, Issue 6

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    Author Tags

    1. diffusion models
    2. low-light image enhancement
    3. wavelet transformation

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    • (2024)CAPformer: Compression-Aware Pre-trained Transformer for Low-Light Image Enhancement2024 IEEE International Conference on Multimedia and Expo (ICME)10.1109/ICME57554.2024.10688040(1-6)Online publication date: 15-Jul-2024
    • (2024)Equipping Diffusion Models with Differentiable Spatial Entropy for Low-Light Image Enhancement2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)10.1109/CVPRW63382.2024.00661(6671-6681)Online publication date: 17-Jun-2024
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