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The lack of resolution has a negative impact on the performance of image-based biometrics. Many applications which are becoming ubiquitous in mobile devices do not operate in a controlled environment, and their performance significantly…

Computer Vision and Pattern Recognition · Computer Science 2022-04-13 Fernando Alonso-Fernandez , Reuben A. Farrugia , Julian Fierrez , Josef Bigun

Face image super-resolution aims to recover high-resolution facial images from severely degraded inputs. Under extreme upscaling factors, fine facial details are often lost, making accurate reconstruction challenging. Existing methods…

Computer Vision and Pattern Recognition · Computer Science 2026-05-15 Riccardo Carraro , Anna Briotto , Endi Hysa , Marco Fiorucci , Lamberto Ballan

Diffusion-based approaches have recently driven remarkable progress in real-world image super-resolution (SR). However, existing methods still struggle to simultaneously preserve fine details and ensure high-fidelity reconstruction, often…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Aro Kim , Myeongjin Jang , Chaewon Moon , Youngjin Shin , Jinwoo Jeong , Sang-hyo Park

Deep convolution-based single image super-resolution (SISR) networks embrace the benefits of learning from large-scale external image resources for local recovery, yet most existing works have ignored the long-range feature-wise…

Computer Vision and Pattern Recognition · Computer Science 2020-06-03 Yiqun Mei , Yuchen Fan , Yuqian Zhou , Lichao Huang , Thomas S. Huang , Humphrey Shi

Image registration is a fundamental task for medical imaging. Resampling of the intensity values is required during registration and better spatial resolution with finer and sharper structures can improve the resampling performance and…

Image and Video Processing · Electrical Eng. & Systems 2022-01-03 Kaicong Sun , Sven Simon

Landmark detection algorithms trained on high resolution images perform poorly on datasets containing low resolution images. This deters the performance of algorithms relying on quality landmarks, for example, face recognition. To the best…

Computer Vision and Pattern Recognition · Computer Science 2019-08-01 Amit Kumar , Rama Chellappa

In this paper we explain a process of super-resolution reconstruction allowing to increase the resolution of an image.The need for high-resolution digital images exists in diverse domains, for example the medical and spatial domains. The…

Image and Video Processing · Electrical Eng. & Systems 2022-12-07 Sebastien Lablanche , Gerard Lablanche

Diffusion models represent the state-of-the-art in generative modeling. Due to their high training costs, many works leverage pre-trained diffusion models' powerful representations for downstream tasks, such as face super-resolution (FSR),…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Jiarui Yang , Tao Dai , Yufei Zhu , Naiqi Li , Jinmin Li , Shutao Xia

This paper addresses deep face recognition (FR) problem under open-set protocol, where ideal face features are expected to have smaller maximal intra-class distance than minimal inter-class distance under a suitably chosen metric space.…

Computer Vision and Pattern Recognition · Computer Science 2018-01-31 Weiyang Liu , Yandong Wen , Zhiding Yu , Ming Li , Bhiksha Raj , Le Song

High resolution Magnetic Resonance (MR) images are desired for accurate diagnostics. In practice, image resolution is restricted by factors like hardware and processing constraints. Recently, deep learning methods have been shown to produce…

Image and Video Processing · Electrical Eng. & Systems 2020-01-08 Venkateswararao Cherukuri , Tiantong Guo , Steve. J. Schiff , Vishal Monga

Large-scale pre-trained diffusion models have been extensively adopted for real-world image Super-Resolution because of their powerful generative priors through textual guidance. However, when super-resolving high-resolution images with…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Qingji Dong , Hang Dong , Mingqin Chen , Rui Zhang , Yitong Wang

Image Super-Resolution (SR) aims to recover a high-resolution image from its low-resolution counterpart, which has been affected by a specific degradation process. This is achieved by enhancing detail and visual quality. Recent advancements…

Computer Vision and Pattern Recognition · Computer Science 2025-01-15 Debasish Dutta , Deepjyoti Chetia , Neeharika Sonowal , Sanjib Kr Kalita

Single image super-resolution (SISR), as a traditional ill-conditioned inverse problem, has been greatly revitalized by the recent development of convolutional neural networks (CNN). These CNN-based methods generally map a low-resolution…

Image and Video Processing · Electrical Eng. & Systems 2024-10-30 Yuqing Liu , Shiqi Wang , Jian Zhang , Shanshe Wang , Siwei Ma , Wen Gao

Limited by the cost and technology, the resolution of depth map collected by depth camera is often lower than that of its associated RGB camera. Although there have been many researches on RGB image super-resolution (SR), a major problem…

Computer Vision and Pattern Recognition · Computer Science 2020-11-25 Chuhua Xian , Kun Qian , Zitian Zhang , Charlie C. L. Wang

Convolutional neural network has recently achieved great success for image restoration (IR) and also offered hierarchical features. However, most deep CNN based IR models do not make full use of the hierarchical features from the original…

Computer Vision and Pattern Recognition · Computer Science 2020-01-24 Yulun Zhang , Yapeng Tian , Yu Kong , Bineng Zhong , Yun Fu

Artifacts, blur and noise are the common distortions degrading MRI images during the acquisition process, and deep neural networks have been demonstrated to help in improving image quality. To well exploit global structural information and…

Image and Video Processing · Electrical Eng. & Systems 2021-04-15 Xiaobin Hu , Yanyang Yan , Wenqi Ren , Hongwei Li , Yu Zhao , Amirhossein Bayat , Bjoern Menze

Most existing face image Super-Resolution (SR) methods assume that the Low-Resolution (LR) images were artificially downsampled from High-Resolution (HR) images with bicubic interpolation. This operation changes the natural image…

Computer Vision and Pattern Recognition · Computer Science 2021-02-08 Andreas Aakerberg , Kamal Nasrollahi , Thomas B. Moeslund

Existing face super-resolution (SR) methods mainly assume the input image to be noise-free. Their performance degrades drastically when applied to real-world scenarios where the input image is always contaminated by noise. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2020-02-18 Jingwei Xin , Nannan Wang , Xinrui Jiang , Jie Li , Xinbo Gao , Zhifeng Li

Whilst recent face-recognition (FR) techniques have made significant progress on recognising constrained high-resolution web images, the same cannot be said on natively unconstrained low-resolution images at large scales. In this work, we…

Computer Vision and Pattern Recognition · Computer Science 2019-04-16 Zhiyi Cheng , Xiatian Zhu , Shaogang Gong

In this paper, we propose a scalable image compression scheme, including the base layer for feature representation and enhancement layer for texture representation. More specifically, the base layer is designed as the deep learning feature…

Computer Vision and Pattern Recognition · Computer Science 2019-08-27 Shurun Wang , Shiqi Wang , Xinfeng Zhang , Shanshe Wang , Siwei Ma , Wen Gao
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