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This paper provides an efficient training-free painterly image harmonization (PIH) method, dubbed FreePIH, that leverages only a pre-trained diffusion model to achieve state-of-the-art harmonization results. Unlike existing methods that…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Ruibin Li , Jingcai Guo , Song Guo , Qihua Zhou , Jie Zhang

Image noise is ubiquitous in photography. However, image noise is not compressible nor desirable, thus attempting to convey the noise in compressed image bitstreams yields sub-par results in both rate and distortion. We propose to…

Image and Video Processing · Electrical Eng. & Systems 2023-07-13 Benoit Brummer , Christophe De Vleeschouwer

Ultra-high-resolution image synthesis holds significant potential, yet remains an underexplored challenge due to the absence of standardized benchmarks and computational constraints. In this paper, we establish Aesthetic-4K, a meticulously…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Jinjin Zhang , Qiuyu Huang , Junjie Liu , Xiefan Guo , Di Huang

Many flagship smartphone cameras now use a dedicated neural image signal processor (ISP) to render noisy raw sensor images to the final processed output. Training nightmode ISP networks relies on large-scale datasets of image pairs with:…

Computer Vision and Pattern Recognition · Computer Science 2022-06-07 Abhijith Punnappurath , Abdullah Abuolaim , Abdelrahman Abdelhamed , Alex Levinshtein , Michael S. Brown

Raw images taken in low-light conditions are very noisy due to low photon count and sensor noise. Learning-based denoisers have the potential to reconstruct high-quality images. For training, however, these denoisers require large paired…

Computer Vision and Pattern Recognition · Computer Science 2025-12-04 Liying Lu , Raphaël Achddou , Sabine Süsstrunk

Currently, mobile and IoT devices are in dire need of a series of methods to enhance 4K images with limited resource expenditure. The absence of large-scale 4K benchmark datasets hampers progress in this area, especially for dehazing. The…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Zhuoran Zheng , Xiuyi Jia

Image alignment and image restoration are classical computer vision tasks. However, there is still a lack of datasets that provide enough data to train and evaluate end-to-end deep learning models. Obtaining ground-truth data for image…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Monika Kwiatkowski , Simon Matern , Olaf Hellwich

Generative image composition aims to regenerate the given foreground object in the background image to produce a realistic composite image. Some high-authenticity methods can adjust foreground pose/view to be compatible with background,…

Computer Vision and Pattern Recognition · Computer Science 2026-02-24 Jingyuan Wang , Li Niu

Food image composition requires the use of existing dish images and background images to synthesize a natural new image, while diffusion models have made significant advancements in image generation, enabling the construction of end-to-end…

Computer Vision and Pattern Recognition · Computer Science 2024-11-04 Chaohua Shi , Xuan Wang , Si Shi , Xule Wang , Mingrui Zhu , Nannan Wang , Xinbo Gao

Despite recent advances in image enhancement, it remains difficult for existing approaches to adaptively improve the brightness and contrast for both low-light and normal-light images. To solve this problem, we propose a novel 2D histogram…

Computer Vision and Pattern Recognition · Computer Science 2022-09-15 Xiaomeng Wu , Yongqing Sun , Akisato Kimura , Kunio Kashino

In MRI, images of the same contrast (e.g., T$_1$) from the same subject can exhibit noticeable differences when acquired using different hardware, sequences, or scan parameters. These differences in images create a domain gap that needs to…

Image and Video Processing · Electrical Eng. & Systems 2023-08-17 Hwihun Jeong , Heejoon Byun , Dong Un Kang , Jongho Lee

Image dehazing is one of the important and popular topics in computer vision and machine learning. A reliable real-time dehazing method with reliable performance is highly desired for many applications such as autonomous driving, security…

Computer Vision and Pattern Recognition · Computer Science 2022-12-16 Ruoteng Li , Xiaoyi Zhang , Shaodi You , Yu Li

Low-light imaging with handheld mobile devices is a challenging issue. Limited by the existing models and training data, most existing methods cannot be effectively applied in real scenarios. In this paper, we propose a new low-light image…

Image and Video Processing · Electrical Eng. & Systems 2021-03-02 Meng Chang , Huajun Feng , Zhihai Xu , Qi Li

Image dehazing is an ill-posed problem that has been extensively studied in the recent years. The objective performance evaluation of the dehazing methods is one of the major obstacles due to the lacking of a reference dataset. While the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-08 Codruta O. Ancuti , Cosmin Ancuti , Radu Timofte

Vision-language models are growing in popularity and public visibility to generate, edit, and caption images at scale; but their outputs can perpetuate and amplify societal biases learned during pre-training on uncurated image-text pairs…

Computer Vision and Pattern Recognition · Computer Science 2023-05-25 Brandon Smith , Miguel Farinha , Siobhan Mackenzie Hall , Hannah Rose Kirk , Aleksandar Shtedritski , Max Bain

Image harmonization aims to modify the color of the composited region with respect to the specific background. Previous works model this task as a pixel-wise image-to-image translation using UNet family structures. However, the model size…

Computer Vision and Pattern Recognition · Computer Science 2021-12-01 Jingtang Liang , Xiaodong Cun , Chi-Man Pun , Jue Wang

Low-light image enhancement is crucial for a myriad of applications, from night vision and surveillance, to autonomous driving. However, due to the inherent limitations that come in hand with capturing images in low-illumination…

Computer Vision and Pattern Recognition · Computer Science 2025-12-11 Manjushree Aithal , Rosaura G. VidalMata , Manikandtan Kartha , Gong Chen , Eashan Adhikarla , Lucas N. Kirsten , Zhicheng Fu , Nikhil A. Madhusudhana , Joe Nasti

Recently, GPT-4o has garnered significant attention for its strong performance in image generation, yet open-source models still lag behind. Several studies have explored distilling image data from GPT-4o to enhance open-source models,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Junyan Ye , Dongzhi Jiang , Zihao Wang , Leqi Zhu , Zhenghao Hu , Zilong Huang , Jun He , Zhiyuan Yan , Jinghua Yu , Hongsheng Li , Conghui He , Weijia Li

The goal of image harmonization is to adjust the foreground in a composite image to achieve visual consistency with the background. Recently, latent diffusion model (LDM) are applied for harmonization, achieving remarkable results. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Zhiqiu Zhang , Dongqi Fan , Mingjie Wang , Qiang Tang , Jian Yang , Zili Yi

Learning-based image harmonization techniques are usually trained to undo synthetic random global transformations applied to a masked foreground in a single ground truth photo. This simulated data does not model many of the important…

Computer Vision and Pattern Recognition · Computer Science 2023-03-02 Ke Wang , Michaël Gharbi , He Zhang , Zhihao Xia , Eli Shechtman