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The identification and restoration of ancient watermarks have long been a major topic in codicology and history. Classifying historical documents based on watermarks is challenging due to their diversity, noisy samples, multiple…

计算机视觉与模式识别 · 计算机科学 2024-09-17 Utsab Saha , Sawradip Saha , Shaikh Anowarul Fattah , Mohammad Saquib

Capturing images under extremely low-light conditions poses significant challenges for the standard camera pipeline. Images become too dark and too noisy, which makes traditional image enhancement techniques almost impossible to apply. Very…

计算机视觉与模式识别 · 计算机科学 2020-06-19 Ahmet Serdar Karadeniz , Erkut Erdem , Aykut Erdem

Since COVID-19, crowd-counting tasks have gained wide applications. While supervised methods are reliable, annotation is more challenging in high-density scenes due to small head sizes and severe occlusion, whereas it's simpler in…

计算机视觉与模式识别 · 计算机科学 2025-03-18 Guoliang Xu , Jianqin Yin , Ren Zhang , Yonghao Dang , Feng Zhou , Bo Yu

Severe weather conditions such as rain and snow adversely affect the visual quality of images captured under such conditions thus rendering them useless for further usage and sharing. In addition, such degraded images drastically affect…

计算机视觉与模式识别 · 计算机科学 2019-06-04 He Zhang , Vishwanath Sindagi , Vishal M. Patel

Image noise modeling is a long-standing problem with many applications in computer vision. Early attempts that propose simple models, such as signal-independent additive white Gaussian noise or the heteroscedastic Gaussian noise model…

图像与视频处理 · 电气工程与系统科学 2022-06-03 Ali Maleky , Shayan Kousha , Michael S. Brown , Marcus A. Brubaker

Enhancing the robustness of object detection systems under adverse weather conditions is crucial for the advancement of autonomous driving technology. This study presents a novel approach leveraging the diffusion model Instruct Pix2Pix to…

计算机视觉与模式识别 · 计算机科学 2025-07-01 Unai Gurbindo , Axel Brando , Jaume Abella , Caroline König

Rain removal in images/videos is still an important task in computer vision field and attracting attentions of more and more people. Traditional methods always utilize some incomplete priors or filters (e.g. guided filter) to remove rain…

计算机视觉与模式识别 · 计算机科学 2019-06-25 Yinglong Wang , Qinfeng Shi , Ehsan Abbasnejad , Chao Ma , Xiaoping Ma , Bing Zeng

Most deraining works focus on rain streaks removal but they cannot deal adequately with heavy rain images. In heavy rain, streaks are strongly visible, dense rain accumulation or rain veiling effect significantly washes out the image,…

计算机视觉与模式识别 · 计算机科学 2019-04-11 Ruotent Li , Loong Fah Cheong , Robby T. Tan

Current crowd counting algorithms are only concerned about the number of people in an image, which lacks low-level fine-grained information of the crowd. For many practical applications, the total number of people in an image is not as…

计算机视觉与模式识别 · 计算机科学 2021-02-24 Jia Wan , Nikil Senthil Kumar , Antoni B. Chan

The problem of generating textual descriptions for the visual data has gained research attention in the recent years. In contrast to that the problem of generating visual data from textual descriptions is still very challenging, because it…

计算机视觉与模式识别 · 计算机科学 2022-10-11 Bulla Rajesh , Nandakishore Dusa , Mohammed Javed , Shiv Ram Dubey , P. Nagabhushan

Electrical tomography techniques have been widely employed for multiphase-flow monitoring owing to their non invasive nature, intrinsic safety, and low cost. Nevertheless, conventional reconstructions struggle to capture fine details, which…

图像与视频处理 · 电气工程与系统科学 2025-12-23 Wejian Yan

We propose a new framework called Noise2Blur (N2B) for training robust image denoising models without pre-collected paired noisy/clean images. The training of the model requires only some (or even one) noisy images, some random unpaired…

图像与视频处理 · 电气工程与系统科学 2020-05-15 Huangxing Lin , Weihong Zeng , Xinghao Ding , Xueyang Fu , Yue Huang , John Paisley

Synthesizing high quality saliency maps from noisy images is a challenging problem in computer vision and has many practical applications. Samples generated by existing techniques for saliency detection cannot handle the noise perturbations…

计算机视觉与模式识别 · 计算机科学 2019-04-03 Prerana Mukherjee , Manoj Sharma , Megh Makwana , Ajay Pratap Singh , Avinash Upadhyay , Akkshita Trivedi , Brejesh Lall , Santanu Chaudhury

Classical convolutional neural networks (cCNNs) are very good at categorizing objects in images. But, unlike human vision which is relatively robust to noise in images, the performance of cCNNs declines quickly as image quality worsens.…

计算机视觉与模式识别 · 计算机科学 2018-11-22 Till S. Hartmann

Different rain models and novel network structures have been proposed to remove rain streaks from single rainy images. In this work, we bring attention to the intrinsic priors and multi-scale features of the rainy images, and develop…

计算机视觉与模式识别 · 计算机科学 2019-11-26 Yinglong Wang , Chao Ma , Bing Zeng

Image denoising methods must effectively model, implicitly or explicitly, the vast diversity of patterns and textures that occur in natural images. This is challenging, even for modern methods that leverage deep neural networks trained to…

计算机视觉与模式识别 · 计算机科学 2019-12-11 Zhihao Xia , Ayan Chakrabarti

Crowd counting problem that counts the number of people in an image has been extensively studied in recent years. In this paper, we introduce a new variant of crowd counting problem, namely "Categorized Crowd Counting", that counts the…

计算机视觉与模式识别 · 计算机科学 2019-12-13 Sarkar Snigdha Sarathi Das , Syed Md. Mukit Rashid , Mohammed Eunus Ali

Generative Adversarial Networks have surprising ability for generating sharp and realistic images, though they are known to suffer from the so-called mode collapse problem. In this paper, we propose a new GAN variant called Mixture Density…

机器学习 · 计算机科学 2018-11-30 Hamid Eghbal-zadeh , Werner Zellinger , Gerhard Widmer

Denoising in the sRGB image space is challenging due to large noise variability. Although end-to-end methods perform well, their effectiveness in real-world scenarios is limited by the scarcity of real noisy-clean image pairs, which are…

计算机视觉与模式识别 · 计算机科学 2026-05-19 Jaekyun Ko , Dongjin Kim , Soomin Lee , Guanghui Wang , Tae Hyun Kim

This paper presents a generative adversarial network (GAN) based approach for radar image enhancement. Although radar sensors remain robust for operations under adverse weather conditions, their application in autonomous vehicles (AVs) is…

计算机视觉与模式识别 · 计算机科学 2024-09-04 Thakshila Thilakanayake , Oscar De Silva , Thumeera R. Wanasinghe , George K. Mann , Awantha Jayasiri