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This paper reviews the NTIRE 2022 challenge on efficient single image super-resolution with focus on the proposed solutions and results. The task of the challenge was to super-resolve an input image with a magnification factor of $\times$4…

Computer Vision and Pattern Recognition · Computer Science 2022-05-12 Yawei Li , Kai Zhang , Radu Timofte , Luc Van Gool , Fangyuan Kong , Mingxi Li , Songwei Liu , Zongcai Du , Ding Liu , Chenhui Zhou , Jingyi Chen , Qingrui Han , Zheyuan Li , Yingqi Liu , Xiangyu Chen , Haoming Cai , Yu Qiao , Chao Dong , Long Sun , Jinshan Pan , Yi Zhu , Zhikai Zong , Xiaoxiao Liu , Zheng Hui , Tao Yang , Peiran Ren , Xuansong Xie , Xian-Sheng Hua , Yanbo Wang , Xiaozhong Ji , Chuming Lin , Donghao Luo , Ying Tai , Chengjie Wang , Zhizhong Zhang , Yuan Xie , Shen Cheng , Ziwei Luo , Lei Yu , Zhihong Wen , Qi Wu1 , Youwei Li , Haoqiang Fan , Jian Sun , Shuaicheng Liu , Yuanfei Huang , Meiguang Jin , Hua Huang , Jing Liu , Xinjian Zhang , Yan Wang , Lingshun Long , Gen Li , Yuanfan Zhang , Zuowei Cao , Lei Sun , Panaetov Alexander , Yucong Wang , Minjie Cai , Li Wang , Lu Tian , Zheyuan Wang , Hongbing Ma , Jie Liu , Chao Chen , Yidong Cai , Jie Tang , Gangshan Wu , Weiran Wang , Shirui Huang , Honglei Lu , Huan Liu , Keyan Wang , Jun Chen , Shi Chen , Yuchun Miao , Zimo Huang , Lefei Zhang , Mustafa Ayazoğlu , Wei Xiong , Chengyi Xiong , Fei Wang , Hao Li , Ruimian Wen , Zhijing Yang , Wenbin Zou , Weixin Zheng , Tian Ye , Yuncheng Zhang , Xiangzhen Kong , Aditya Arora , Syed Waqas Zamir , Salman Khan , Munawar Hayat , Fahad Shahbaz Khan , Dandan Gaoand Dengwen Zhouand Qian Ning , Jingzhu Tang , Han Huang , Yufei Wang , Zhangheng Peng , Haobo Li , Wenxue Guan , Shenghua Gong , Xin Li , Jun Liu , Wanjun Wang , Dengwen Zhou , Kun Zeng , Hanjiang Lin , Xinyu Chen , Jinsheng Fang

This paper reviews the NTIRE 2025 Challenge on Day and Night Raindrop Removal for Dual-Focused Images. This challenge received a wide range of impressive solutions, which are developed and evaluated using our collected real-world Raindrop…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Xin Li , Yeying Jin , Xin Jin , Zongwei Wu , Bingchen Li , Yufei Wang , Wenhan Yang , Yu Li , Zhibo Chen , Bihan Wen , Robby T. Tan , Radu Timofte , Qiyu Rong , Hongyuan Jing , Mengmeng Zhang , Jinglong Li , Xiangyu Lu , Yi Ren , Yuting Liu , Meng Zhang , Xiang Chen , Qiyuan Guan , Jiangxin Dong , Jinshan Pan , Conglin Gou , Qirui Yang , Fangpu Zhang , Yunlong Lin , Sixiang Chen , Guoxi Huang , Ruirui Lin , Yan Zhang , Jingyu Yang , Huanjing Yue , Jiyuan Chen , Qiaosi Yi , Hongjun Wang , Chenxi Xie , Shuai Li , Yuhui Wu , Kaiyi Ma , Jiakui Hu , Juncheng Li , Liwen Pan , Guangwei Gao , Wenjie Li , Zhenyu Jin , Heng Guo , Zhanyu Ma , Yubo Wang , Jinghua Wang , Wangzhi Xing , Anjusree Karnavar , Diqi Chen , Mohammad Aminul Islam , Hao Yang , Ruikun Zhang , Liyuan Pan , Qianhao Luo , XinCao , Han Zhou , Yan Min , Wei Dong , Jun Chen , Taoyi Wu , Weijia Dou , Yu Wang , Shengjie Zhao , Yongcheng Huang , Xingyu Han , Anyan Huang , Hongtao Wu , Hong Wang , Yefeng Zheng , Abhijeet Kumar , Aman Kumar , Marcos V. Conde , Paula Garrido , Daniel Feijoo , Juan C. Benito , Guanglu Dong , Xin Lin , Siyuan Liu , Tianheng Zheng , Jiayu Zhong , Shouyi Wang , Xiangtai Li , Lanqing Guo , Lu Qi , Chao Ren , Shuaibo Wang , Shilong Zhang , Wanyu Zhou , Yunze Wu , Qinzhong Tan , Jieyuan Pei , Zhuoxuan Li , Jiayu Wang , Haoyu Bian , Haoran Sun , Subhajit Paul , Ni Tang , Junhao Huang , Zihan Cheng , Hongyun Zhu , Yuehan Wu , Kaixin Deng , Hang Ouyang , Tianxin Xiao , Fan Yang , Zhizun Luo , Zeyu Xiao , Zhuoyuan Li , Nguyen Pham Hoang Le , An Dinh Thien , Son T. Luu , Kiet Van Nguyen , Ronghua Xu , Xianmin Tian , Weijian Zhou , Jiacheng Zhang , Yuqian Chen , Yihang Duan , Yujie Wu , Suresh Raikwar , Arsh Garg , Kritika , Jianhua Zheng , Xiaoshan Ma , Ruolin Zhao , Yongyu Yang , Yongsheng Liang , Guiming Huang , Qiang Li , Hongbin Zhang , Xiangyu Zheng , A. N. Rajagopalan

This paper presents NTIRE 2026, the 3rd Restore Any Image Model (RAIM) challenge on multi-exposure image fusion in dynamic scenes. We introduce a benchmark that targets a practical yet difficult HDR imaging setting, where exposure…

Low-light image enhancement (LLIE) aims at improving the perception or interpretability of an image captured in an environment with poor illumination. Recent advances in this area are dominated by deep learning-based solutions, where many…

Computer Vision and Pattern Recognition · Computer Science 2021-11-08 Chongyi Li , Chunle Guo , Linghao Han , Jun Jiang , Ming-Ming Cheng , Jinwei Gu , Chen Change Loy

This paper provides a review of the NTIRE 2025 challenge on real-world face restoration, highlighting the proposed solutions and the resulting outcomes. The challenge focuses on generating natural, realistic outputs while maintaining…

Photography during night or in dark conditions typically suffers from noise, low light and blurring issues due to the dim environment and the common use of long exposure. Although Deblurring and Low-light Image Enhancement (LLIE) are…

Computer Vision and Pattern Recognition · Computer Science 2025-10-15 Daniel Feijoo , Juan C. Benito , Alvaro Garcia , Marcos V. Conde

We present a lightweight two-stage framework for low-light image enhancement (LLIE) that achieves competitive perceptual quality with significantly fewer parameters than existing methods. Our approach combines frozen algorithm-based…

Computer Vision and Pattern Recognition · Computer Science 2026-05-21 Shimon Murai , Teppei Kurita , Ryuta Satoh , Yusuke Moriuchi

We review the AIM 2020 challenge on virtual image relighting and illumination estimation. This paper presents the novel VIDIT dataset used in the challenge and the different proposed solutions and final evaluation results over the 3…

This paper reviews the NTIRE 2020 Challenge on NonHomogeneous Dehazing of images (restoration of rich details in hazy image). We focus on the proposed solutions and their results evaluated on NH-Haze, a novel dataset consisting of 55 pairs…

The Low-Power Image Recognition Challenge (LPIRC, https://rebootingcomputing.ieee.org/lpirc) is an annual competition started in 2015. The competition identifies the best technologies that can classify and detect objects in images…

Low-light image enhancement (LLIE) aims at improving the illumination and visibility of dark images with lighting noise. To handle the real-world low-light images often with heavy and complex noise, some efforts have been made for joint…

Computer Vision and Pattern Recognition · Computer Science 2022-11-16 Jiahuan Ren , Zhao Zhang , Richang Hong , Mingliang Xu , Yi Yang , Shuicheng Yan

This paper reviews the challenge on constrained high dynamic range (HDR) imaging that was part of the New Trends in Image Restoration and Enhancement (NTIRE) workshop, held in conjunction with CVPR 2022. This manuscript focuses on the…

The increasing demand for computational photography and imaging on mobile platforms has led to the widespread development and integration of advanced image sensors with novel algorithms in camera systems. However, the scarcity of…

When one captures images in low-light conditions, the images often suffer from low visibility. This poor quality may significantly degrade the performance of many computer vision and multimedia algorithms that are primarily designed for…

Computer Vision and Pattern Recognition · Computer Science 2016-07-26 Xiaojie Guo

Images captured in weak illumination conditions could seriously degrade the image quality. Solving a series of degradation of low-light images can effectively improve the visual quality of images and the performance of high-level visual…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Jiang Hai , Zhu Xuan , Songchen Han , Ren Yang , Yutong Hao , Fengzhu Zou , Fang Lin

Low-light image enhancement task is essential yet challenging as it is ill-posed intrinsically. Previous arts mainly focus on the low-light images captured in the visible spectrum using pixel-wise loss, which limits the capacity of…

Computer Vision and Pattern Recognition · Computer Science 2023-07-11 Shulin Tian , Yufei Wang , Renjie Wan , Wenhan Yang , Alex C. Kot , Bihan Wen

This paper provides a comprehensive review of the NTIRE 2024 challenge, focusing on efficient single-image super-resolution (ESR) solutions and their outcomes. The task of this challenge is to super-resolve an input image with a…

Computer Vision and Pattern Recognition · Computer Science 2024-06-26 Bin Ren , Yawei Li , Nancy Mehta , Radu Timofte , Hongyuan Yu , Cheng Wan , Yuxin Hong , Bingnan Han , Zhuoyuan Wu , Yajun Zou , Yuqing Liu , Jizhe Li , Keji He , Chao Fan , Heng Zhang , Xiaolin Zhang , Xuanwu Yin , Kunlong Zuo , Bohao Liao , Peizhe Xia , Long Peng , Zhibo Du , Xin Di , Wangkai Li , Yang Wang , Wei Zhai , Renjing Pei , Jiaming Guo , Songcen Xu , Yang Cao , Zhengjun Zha , Yan Wang , Yi Liu , Qing Wang , Gang Zhang , Liou Zhang , Shijie Zhao , Long Sun , Jinshan Pan , Jiangxin Dong , Jinhui Tang , Xin Liu , Min Yan , Qian Wang , Menghan Zhou , Yiqiang Yan , Yixuan Liu , Wensong Chan , Dehua Tang , Dong Zhou , Li Wang , Lu Tian , Barsoum Emad , Bohan Jia , Junbo Qiao , Yunshuai Zhou , Yun Zhang , Wei Li , Shaohui Lin , Shenglong Zhou , Binbin Chen , Jincheng Liao , Suiyi Zhao , Zhao Zhang , Bo Wang , Yan Luo , Yanyan Wei , Feng Li , Mingshen Wang , Yawei Li , Jinhan Guan , Dehua Hu , Jiawei Yu , Qisheng Xu , Tao Sun , Long Lan , Kele Xu , Xin Lin , Jingtong Yue , Lehan Yang , Shiyi Du , Lu Qi , Chao Ren , Zeyu Han , Yuhan Wang , Chaolin Chen , Haobo Li , Mingjun Zheng , Zhongbao Yang , Lianhong Song , Xingzhuo Yan , Minghan Fu , Jingyi Zhang , Baiang Li , Qi Zhu , Xiaogang Xu , Dan Guo , Chunle Guo , Jiadi Chen , Huanhuan Long , Chunjiang Duanmu , Xiaoyan Lei , Jie Liu , Weilin Jia , Weifeng Cao , Wenlong Zhang , Yanyu Mao , Ruilong Guo , Nihao Zhang , Qian Wang , Manoj Pandey , Maksym Chernozhukov , Giang Le , Shuli Cheng , Hongyuan Wang , Ziyan Wei , Qingting Tang , Liejun Wang , Yongming Li , Yanhui Guo , Hao Xu , Akram Khatami-Rizi , Ahmad Mahmoudi-Aznaveh , Chih-Chung Hsu , Chia-Ming Lee , Yi-Shiuan Chou , Amogh Joshi , Nikhil Akalwadi , Sampada Malagi , Palani Yashaswini , Chaitra Desai , Ramesh Ashok Tabib , Ujwala Patil , Uma Mudenagudi

In this paper, we analyze and discuss ShadowFormer in preparation for the NTIRE2023 Shadow Removal Challenge [1], implementing five key improvements: image alignment, the introduction of a perceptual quality loss function, the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-18 Yuki Kondo , Riku Miyata , Fuma Yasue , Taito Naruki , Norimichi Ukita