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High resolution (HR) 3D images are widely used nowadays, such as medical images like Magnetic Resonance Imaging (MRI) and Computed Tomography (CT). However, segmentation of these 3D images remains a challenge due to their high spatial…

Image and Video Processing · Electrical Eng. & Systems 2023-07-11 Hongyi Wang , Lanfen Lin , Hongjie Hu , Qingqing Chen , Yinhao Li , Yutaro Iwamoto , Xian-Hua Han , Yen-Wei Chen , Ruofeng Tong

Hyperspectral super-resolution (HSR) is a problem that aims to estimate an image of high spectral and spatial resolutions from a pair of co-registered multispectral (MS) and hyperspectral (HS) images, which have coarser spectral and spatial…

Image and Video Processing · Electrical Eng. & Systems 2020-10-28 Ruiyuan Wu , Wing-Kin Ma , Xiao Fu , Qiang Li

The defocus deblurring raised from the finite aperture size and exposure time is an essential problem in the computational photography. It is very challenging because the blur kernel is spatially varying and difficult to estimate by…

Image and Video Processing · Electrical Eng. & Systems 2021-06-01 Pengwei Liang , Junjun Jiang , Xianming Liu , Jiayi Ma

Most existing CNN-based super-resolution (SR) methods are developed based on an assumption that the degradation is fixed and known (e.g., bicubic downsampling). However, these methods suffer a severe performance drop when the real…

Computer Vision and Pattern Recognition · Computer Science 2021-04-02 Longguang Wang , Yingqian Wang , Xiaoyu Dong , Qingyu Xu , Jungang Yang , Wei An , Yulan Guo

In this paper, we study the problem of recovering a sharp version of a given blurry image when the blur kernel is unknown. Previous methods often introduce an image-independent regularizer (such as Gaussian or sparse priors) on the desired…

Computer Vision and Pattern Recognition · Computer Science 2014-04-23 Guangcan Liu , Shiyu Chang , Yi Ma

High-resolution cameras have become very helpful for plant phenotyping by providing a mechanism for tasks such as target versus background discrimination, and the measurement and analysis of fine-above-ground plant attributes. However, the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-06 Jose F. Ruiz-Munoz , Jyothier K. Nimmagadda , Tyler G. Dowd , James E. Baciak , Alina Zare

The capabilities of super-resolution reconstruction (SRR)---techniques for enhancing image spatial resolution---have been recently improved significantly by the use of deep convolutional neural networks. Commonly, such networks are learned…

Computer Vision and Pattern Recognition · Computer Science 2019-06-18 Michal Kawulok , Szymon Piechaczek , Krzysztof Hrynczenko , Pawel Benecki , Daniel Kostrzewa , Jakub Nalepa

We propose a very fast and effective one-step restoring method for blurry face images. In the last decades, many blind deblurring algorithms have been proposed to restore latent sharp images. However, these algorithms run slowly because of…

Computer Vision and Pattern Recognition · Computer Science 2017-11-28 Lingxiao Wang , Yali Li , Shengjin Wang

Single Image Super-Resolution (SISR) is one of the low-level computer vision problems that has received increased attention in the last few years. Current approaches are primarily based on harnessing the power of deep learning models and…

Computer Vision and Pattern Recognition · Computer Science 2021-05-19 Santiago López-Tapia , Nicolás Pérez de la Blanca

Non-uniform blind deblurring for general dynamic scenes is a challenging computer vision problem as blurs arise not only from multiple object motions but also from camera shake, scene depth variation. To remove these complicated motion…

Computer Vision and Pattern Recognition · Computer Science 2018-05-08 Seungjun Nah , Tae Hyun Kim , Kyoung Mu Lee

Image super-resolution (SR) is an effective way to enhance the spatial resolution and detail information of remote sensing images, to obtain a superior visual quality. As SR is severely ill-conditioned, effective image priors are necessary…

Computer Vision and Pattern Recognition · Computer Science 2024-12-16 Jing Sun , Huanfeng Shen , Qiangqiang Yuan , Liangpei Zhang

Remote sensing images (RSIs) in real scenes may be disturbed by multiple factors such as optical blur, undersampling, and additional noise, resulting in complex and diverse degradation models. At present, the mainstream SR algorithms only…

Image and Video Processing · Electrical Eng. & Systems 2022-10-17 Hanlin Wu , Ning Ni , Shan Wang , Libao Zhang

Hyperspectral images are of crucial importance in order to better understand features of different materials. To reach this goal, they leverage on a high number of spectral bands. However, this interesting characteristic is often paid by a…

Image and Video Processing · Electrical Eng. & Systems 2020-06-01 Jin-Fan Hu , Ting-Zhu Huang , Liang-Jian Deng , Tai-Xiang Jiang , Gemine Vivone , Jocelyn Chanussot

When a high-resolution (HR) image is degraded into a low-resolution (LR) image, the image loses some of the existing information. Consequently, multiple HR images can correspond to the LR image. Most of the existing methods do not consider…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Hanbyel Cho , Yekang Lee , Jaemyung Yu , Junmo Kim

Blind deconvolution problems are severely ill-posed because neither the underlying signal nor the forward operator are not known exactly. Conventionally, these problems are solved by alternating between estimation of the image and kernel…

Image and Video Processing · Electrical Eng. & Systems 2023-12-06 Yash Sanghvi , Yiheng Chi , Stanley H. Chan

The goal of blind image deblurring is to recover a sharp image from a motion blurred one without knowing the camera motion. Current state-of-the-art methods have a remarkably good performance on images with no noise or very low noise…

Computer Vision and Pattern Recognition · Computer Science 2019-05-17 Jérémy Anger , Mauricio Delbracio , Gabriele Facciolo

Deconvolution is a fundamental inverse problem in signal processing and the prototypical model for recovering a signal from its noisy measurement. Nevertheless, the majority of model-based inversion techniques require knowledge on the…

Signal Processing · Electrical Eng. & Systems 2020-07-23 Arttu Arjas , Lassi Roininen , Mikko J. Sillanpää , Andreas Hauptmann

Deep neural networks have greatly promoted the performance of single image super-resolution (SISR). Conventional methods still resort to restoring the single high-resolution (HR) solution only based on the input of image modality. However,…

Computer Vision and Pattern Recognition · Computer Science 2022-07-15 Chenxi Ma , Bo Yan , Qing Lin , Weimin Tan , Siming Chen

Convolutional neural network (CNN)-based methods have achieved great success for single-image superresolution (SISR). However, most models attempt to improve reconstruction accuracy while increasing the requirement of number of model…

Image and Video Processing · Electrical Eng. & Systems 2020-08-05 Supratik Banerjee , Cagri Ozcinar , Aakanksha Rana , Aljosa Smolic , Michael Manzke

Deep neural networks have exhibited promising performance in image super-resolution (SR) by learning a nonlinear mapping function from low-resolution (LR) images to high-resolution (HR) images. However, there are two underlying limitations…

Computer Vision and Pattern Recognition · Computer Science 2020-05-25 Yong Guo , Jian Chen , Jingdong Wang , Qi Chen , Jiezhang Cao , Zeshuai Deng , Yanwu Xu , Mingkui Tan