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Model-based single image dehazing algorithms restore haze-free images with sharp edges and rich details for real-world hazy images at the expense of low PSNR and SSIM values for synthetic hazy images. Data-driven ones restore haze-free…

Computer Vision and Pattern Recognition · Computer Science 2022-10-12 Zhengguo Li , Chaobing Zheng , Haiyan Shu , Shiqian Wu

Learning-based image dehazing methods are essential to assist autonomous systems in enhancing reliability. Due to the domain gap between synthetic and real domains, the internal information learned from synthesized images is usually…

Computer Vision and Pattern Recognition · Computer Science 2022-11-15 Wenqi Ren , Qiyu Sun , Chaoqiang Zhao , Yang Tang

We describe a novel method for training high-quality image denoising models based on unorganized collections of corrupted images. The training does not need access to clean reference images, or explicit pairs of corrupted images, and can…

Machine Learning · Computer Science 2019-10-29 Samuli Laine , Tero Karras , Jaakko Lehtinen , Timo Aila

Unsupervised image-to-image translation tasks aim to find a mapping between a source domain X and a target domain Y from unpaired training data. Contrastive learning for Unpaired image-to-image Translation (CUT) yields state-of-the-art…

Computer Vision and Pattern Recognition · Computer Science 2021-04-19 Junlin Han , Mehrdad Shoeiby , Lars Petersson , Mohammad Ali Armin

Uneven light image enhancement is a highly demanded task in many industrial image processing applications. Many existing enhancement methods using physical lighting models or deep-learning techniques often lead to unnatural results. This is…

Image and Video Processing · Electrical Eng. & Systems 2023-05-26 Tian Pu , Shuhang Wang , Zhenming Peng , Qingsong Zhu

Recently, contrastive learning has achieved great results in self-supervised learning, where the main idea is to push two augmentations of an image (positive pairs) closer compared to other random images (negative pairs). We argue that not…

Computer Vision and Pattern Recognition · Computer Science 2021-09-13 Ajinkya Tejankar , Soroush Abbasi Koohpayegani , Vipin Pillai , Paolo Favaro , Hamed Pirsiavash

Unsupervised person re-identification (ReID) aims at learning discriminative identity features without annotations. Recently, self-supervised contrastive learning has gained increasing attention for its effectiveness in unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2021-08-19 Hao Chen , Benoit Lagadec , Francois Bremond

The key procedure of haze image translation through adversarial training lies in the disentanglement between the feature only involved in haze synthesis, i.e.style feature, and the feature representing the invariant semantic content, i.e.…

Computer Vision and Pattern Recognition · Computer Science 2021-11-29 Chi Zhang , Zihang Lin , Liheng Xu , Zongliang Li , Wei Tang , Yuehu Liu , Gaofeng Meng , Le Wang , Li Li

Supervised training for real-world denoising presents challenges due to the difficulty of collecting large datasets of paired noisy and clean images. Recent methods have attempted to address this by utilizing unpaired datasets of clean and…

Computer Vision and Pattern Recognition · Computer Science 2025-03-28 Hamadi Chihaoui , Paolo Favaro

Images acquired in hazy conditions have degradations induced in them. Dehazing such images is a vexed and ill-posed problem. Scores of prior-based and learning-based approaches have been proposed to mitigate the effect of haze and generate…

Computer Vision and Pattern Recognition · Computer Science 2023-12-18 Abdul Wasi , O. Jeba Shiney

Depth estimation from a single underwater image is one of the most challenging problems and is highly ill-posed. Due to the absence of large generalized underwater depth datasets and the difficulty in obtaining ground truth depth-maps,…

Computer Vision and Pattern Recognition · Computer Science 2019-05-29 Honey Gupta , Kaushik Mitra

Single image dehazing is a critical image pre-processing step for subsequent high-level computer vision tasks. However, it remains challenging due to its ill-posed nature. Existing dehazing models tend to suffer from model overcomplexity…

Computer Vision and Pattern Recognition · Computer Science 2019-07-09 Jing Zhang , Dacheng Tao

We devise a new regularization, called self-verification, for image denoising. This regularization is formulated using a deep image prior learned by the network, rather than a traditional predefined prior. Specifically, we treat the output…

Image and Video Processing · Electrical Eng. & Systems 2021-11-02 Huangxing Lin , Yihong Zhuang , Delu Zeng , Yue Huang , Xinghao Ding , John Paisley

Rigid image alignment is a fundamental task in computer vision, while the traditional algorithms are either too sensitive to noise or time-consuming. Recent unsupervised image alignment methods developed based on spatial transformer…

Computer Vision and Pattern Recognition · Computer Science 2022-05-25 Yu-Xuan Chen , Dagan Feng , Hong-Bin Shen

Person re-identification (ReID) aims at searching the same identity person among images captured by various cameras. Unsupervised person ReID attracts a lot of attention recently, due to it works without intensive manual annotation and thus…

Computer Vision and Pattern Recognition · Computer Science 2021-03-05 Bo Pang , Deming Zhai , Junjun Jiang , Xianming Liu

Image hashing is a popular technique applied to large scale content-based visual retrieval due to its compact and efficient binary codes. Our work proposes a new end-to-end deep network architecture for supervised hashing which directly…

Computer Vision and Pattern Recognition · Computer Science 2018-10-30 Dang-Khoa Le Tan , Thanh-Toan Do , Ngai-Man Cheung

Recent years have witnessed an increased interest in image dehazing. Many deep learning methods have been proposed to tackle this challenge, and have made significant accomplishments dealing with homogeneous haze. However, these solutions…

Computer Vision and Pattern Recognition · Computer Science 2023-04-19 Yangyi Liu , Huan Liu , Liangyan Li , Zijun Wu , Jun Chen

We present a comprehensive study and evaluation of existing single image dehazing algorithms, using a new large-scale benchmark consisting of both synthetic and real-world hazy images, called REalistic Single Image DEhazing (RESIDE). RESIDE…

Computer Vision and Pattern Recognition · Computer Science 2019-04-23 Boyi Li , Wenqi Ren , Dengpan Fu , Dacheng Tao , Dan Feng , Wenjun Zeng , Zhangyang Wang

Single image haze removal is a challenging ill-posed problem. Existing methods use various constraints/priors to get plausible dehazing solutions. The key to achieve haze removal is to estimate a medium transmission map for an input hazy…

Computer Vision and Pattern Recognition · Computer Science 2016-11-03 Bolun Cai , Xiangmin Xu , Kui Jia , Chunmei Qing , Dacheng Tao

Imaging is a standard example of an inverse problem, where the task of reconstructing a ground truth from a noisy measurement is ill-posed. Recent state-of-the-art approaches for imaging use deep learning, spearheaded by unrolled and…

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