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In this work, we address the limitations of denoising diffusion models (DDMs) in image restoration tasks, particularly the shape and color distortions that can compromise image quality. While DDMs have demonstrated a promising performance…

Computer Vision and Pattern Recognition · Computer Science 2024-12-18 Xinlong Cheng , Tiantian Cao , Guoan Cheng , Bangxuan Huang , Xinghan Tian , Ye Wang , Xiaoyu He , Weixin Li , Tianfan Xue , Xuan Dong

Image correction aims to adjust an input image into a visually pleasing one. Existing approaches are proposed mainly from the perspective of image pixel manipulation. They are not effective to recover the details in the under/over exposed…

Computer Vision and Pattern Recognition · Computer Science 2018-04-13 Xin Yang , Ke Xu , Yibing Song , Qiang Zhang , Xiaopeng Wei , Rynson Lau

This study investigates the effectiveness of modern Deformable Convolutional Neural Networks (DCNNs) for semantic segmentation tasks, particularly in autonomous driving scenarios with fisheye images. These images, providing a wide field of…

Computer Vision and Pattern Recognition · Computer Science 2024-10-02 Anam Manzoor , Aryan Singh , Ganesh Sistu , Reenu Mohandas , Eoin Grua , Anthony Scanlan , Ciarán Eising

Underwater image restoration is of significant importance in unveiling the underwater world. Numerous techniques and algorithms have been developed in the past decades. However, due to fundamental difficulties associated with…

Image and Video Processing · Electrical Eng. & Systems 2021-06-22 Junlin Han , Mehrdad Shoeiby , Tim Malthus , Elizabeth Botha , Janet Anstee , Saeed Anwar , Ran Wei , Mohammad Ali Armin , Hongdong Li , Lars Petersson

An approach to incorporate deep learning within an iterative image reconstruction framework to reconstruct images from severely incomplete measurement data is presented. Specifically, we utilize a convolutional neural network (CNN) as a…

Computer Vision and Pattern Recognition · Computer Science 2017-09-05 Brendan Kelly , Thomas P. Matthews , Mark A. Anastasio

Although fisheye cameras are in high demand in many application areas due to their large field of view, many image and video signal processing tasks such as motion compensation suffer from the introduced strong radial distortions. A…

Computer Vision and Pattern Recognition · Computer Science 2022-03-01 Andy Regensky , Christian Herglotz , André Kaup

Previous approaches for blind image super-resolution (SR) have relied on degradation estimation to restore high-resolution (HR) images from their low-resolution (LR) counterparts. However, accurate degradation estimation poses significant…

Image and Video Processing · Electrical Eng. & Systems 2024-03-13 Haochen Sun , Yan Yuan , Lijuan Su , Haotian Shao

We present a deep learning method for accurately localizing the center of a single corneal reflection (CR) in an eye image. Unlike previous approaches, we use a convolutional neural network (CNN) that was trained solely using simulated…

Computer Vision and Pattern Recognition · Computer Science 2024-01-02 Sean Anthony Byrne , Marcus Nyström , Virmarie Maquiling , Enkelejda Kasneci , Diederick C. Niehorster

Wide-angle fisheye images are becoming increasingly common for perception tasks in applications such as robotics, security, and mobility (e.g. drones, avionics). However, current models often either ignore the distortions in wide-angle…

Computer Vision and Pattern Recognition · Computer Science 2025-02-19 Akshaya Athwale , Ichrak Shili , Émile Bergeron , Ola Ahmad , Jean-François Lalonde

Most existing image restoration networks are designed in a disposable way and catastrophically forget previously learned distortions when trained on a new distortion removal task. To alleviate this problem, we raise the novel lifelong image…

Image and Video Processing · Electrical Eng. & Systems 2020-08-20 Jianzhao Liu , Jianxin Lin , Xin Li , Wei Zhou , Sen Liu , Zhibo Chen

This paper presents a new variational inference framework for image restoration and a convolutional neural network (CNN) structure that can solve the restoration problems described by the proposed framework. Earlier CNN-based image…

Image and Video Processing · Electrical Eng. & Systems 2022-07-20 Jae Woong Soh , Nam Ik Cho

The challenging task of 3D planar reconstruction from images involves several sub-tasks including frame-wise plane detection, segmentation, parameter regression and possibly depth prediction, along with cross-frame plane correspondence and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Jingjia Shi , Shuaifeng Zhi , Kai Xu

Despite recent progress, computational visual aesthetic is still challenging. Image cropping, which refers to the removal of unwanted scene areas, is an important step to improve the aesthetic quality of an image. However, it is challenging…

Computer Vision and Pattern Recognition · Computer Science 2018-01-16 Guanjun Guo , Hanzi Wang , Chunhua Shen , Yan Yan , Hong-Yuan Mark Liao

The study of neurodegenerative diseases relies on the reconstruction and analysis of the brain cortex from magnetic resonance imaging (MRI). Traditional frameworks for this task like FreeSurfer demand lengthy runtimes, while its accelerated…

Image and Video Processing · Electrical Eng. & Systems 2020-10-23 Rodrigo Santa Cruz , Leo Lebrat , Pierrick Bourgeat , Clinton Fookes , Jurgen Fripp , Olivier Salvado

A long-held challenge in no-reference image quality assessment (NR-IQA) learning from human subjective perception is the lack of objective generalization to unseen natural distortions. To address this, we integrate a novel Depth-Guided…

Computer Vision and Pattern Recognition · Computer Science 2025-06-02 Vaishnav Ramesh , Junliang Liu , Haining Wang , Md Jahidul Islam

In recent years we have witnessed an increasing interest in applying Deep Neural Networks (DNNs) to improve the rate-distortion performance in image compression. However, the existing approaches either train a post-processing DNN on the…

Image and Video Processing · Electrical Eng. & Systems 2020-10-27 Yannick Strümpler , Ren Yang , Radu Timofte

Image restoration (IR) aims to recover high-quality images from degraded inputs, with recent deep learning advancements significantly enhancing performance. However, existing methods lack a unified training benchmark for iterations and…

Computer Vision and Pattern Recognition · Computer Science 2024-12-12 Yuzhen Du , Teng Hu , Jiangning Zhang , Ran Yi Chengming Xu , Xiaobin Hu , Kai Wu , Donghao Luo , Yabiao Wang , Lizhuang Ma

Perspective distortion (PD) leads to substantial alterations in the shape, size, orientation, angles, and spatial relationships of visual elements in images. Accurately determining camera intrinsic and extrinsic parameters is challenging,…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Meenakshi Subhash Chippa , Prakash Chandra Chhipa , Kanjar De , Marcus Liwicki , Rajkumar Saini

In this paper, we deal with the problem of monocular depth estimation for fisheye cameras in a self-supervised manner. A known issue of self-supervised depth estimation is that it suffers in low-light/over-exposure conditions and in large…

Computer Vision and Pattern Recognition · Computer Science 2022-05-09 Qingan Yan , Pan Ji , Nitin Bansal , Yuxin Ma , Yuan Tian , Yi Xu

Fisheye lens, which is suitable for panoramic imaging, has the prominent advantage of a large field of view and low cost. However, the fisheye image has a severe geometric distortion which may interfere with the stage of image registration…

Computer Vision and Pattern Recognition · Computer Science 2023-07-25 Jing Hao , Jingming Xie , Jinyuan Zhang , Moyun Liu