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The acquisition conditions for low-dose and high-dose CT images are usually different, so that the shifts in the CT numbers often occur. Accordingly, unsupervised deep learning-based approaches, which learn the target image distribution,…

图像与视频处理 · 电气工程与系统科学 2022-07-15 Chanyong Jung , Joonhyung Lee , Sunkyoung You , Jong Chul Ye

Filtering multi-dimensional images such as color images, color videos, multispectral images and magnetic resonance images is challenging in terms of both effectiveness and efficiency. Leveraging the nonlocal self-similarity (NLSS)…

图像与视频处理 · 电气工程与系统科学 2020-11-09 Zhaoming Kong , Xiaowei Yang , Lifang He

Under certain statistical assumptions of noise, recent self-supervised approaches for denoising have been introduced to learn network parameters without true clean images, and these methods can restore an image by exploiting information…

计算机视觉与模式识别 · 计算机科学 2020-01-10 Seunghwan Lee , Donghyeon Cho , Jiwon Kim , Tae Hyun Kim

Image denoising is a fundamental task in computer vision. While prevailing deep learning-based supervised and self-supervised methods have excelled in eliminating in-distribution noise, their susceptibility to out-of-distribution (OOD)…

计算机视觉与模式识别 · 计算机科学 2024-03-25 Jun Cheng , Dong Liang , Shan Tan

Denoisers trained with synthetic data often fail to cope with the diversity of unknown noises, giving way to methods that can adapt to existing noise without knowing its ground truth. Previous image-based method leads to noise overfitting…

计算机视觉与模式识别 · 计算机科学 2021-04-01 Yanghao Li , Bichuan Guo , Jiangtao Wen , Zhen Xia , Shan Liu , Yuxing Han

Do video-text transformers learn to model temporal relationships across frames? Despite their immense capacity and the abundance of multimodal training data, recent work has revealed the strong tendency of video-text models towards…

计算机视觉与模式识别 · 计算机科学 2023-04-19 Yi Li , Kyle Min , Subarna Tripathi , Nuno Vasconcelos

Denoising diffusion models have recently achieved state-of-the-art performance in many image-generation tasks. They do, however, require a large amount of computational resources. This limits their application to medical tasks, where we…

计算机视觉与模式识别 · 计算机科学 2024-09-13 Florentin Bieder , Julia Wolleb , Alicia Durrer , Robin Sandkühler , Philippe C. Cattin

Data-driven deep learning approaches to image registration can be less accurate than conventional iterative approaches, especially when training data is limited. To address this whilst retaining the fast inference speed of deep learning, we…

Filtering images of more than one channel is challenging in terms of both efficiency and effectiveness. By grouping similar patches to utilize the self-similarity and sparse linear approximation of natural images, recent nonlocal and…

计算机视觉与模式识别 · 计算机科学 2019-07-24 Zhaoming Kong , Xiaowei Yang

Recent studies on learning-based image denoising have achieved promising performance on various noise reduction tasks. Most of these deep denoisers are trained either under the supervision of clean references, or unsupervised on synthetic…

图像与视频处理 · 电气工程与系统科学 2021-03-30 Rui Zhao , Daniel P. K. Lun , Kin-Man Lam

We propose ViDeNN: a CNN for Video Denoising without prior knowledge on the noise distribution (blind denoising). The CNN architecture uses a combination of spatial and temporal filtering, learning to spatially denoise the frames first and…

计算机视觉与模式识别 · 计算机科学 2019-04-25 Michele Claus , Jan van Gemert

The point process is a solid framework to model sequential data, such as videos, by exploring the underlying relevance. As a challenging problem for high-level video understanding, weakly supervised action recognition and localization in…

计算机视觉与模式识别 · 计算机科学 2019-11-28 Xiao-Yu Zhang , Changsheng Li , Haichao Shi , Xiaobin Zhu , Peng Li , Jing Dong

The 3D block matching (BM3D) method is among the state-of-art methods for denoising images corrupted with additive white Gaussian noise. With the help of a novel inter-frame connectivity strategy, we propose an extension of the BM3D method…

图像与视频处理 · 电气工程与系统科学 2019-06-18 Kireeti Bodduna , Joachim Weickert

Transformer has achieved great success in computer vision, while how to split patches in an image remains a problem. Existing methods usually use a fixed-size patch embedding which might destroy the semantics of objects. To address this…

计算机视觉与模式识别 · 计算机科学 2021-08-02 Zhiyang Chen , Yousong Zhu , Chaoyang Zhao , Guosheng Hu , Wei Zeng , Jinqiao Wang , Ming Tang

As multimedia content often contains noise from intrinsic defects of digital devices, image denoising is an important step for high-level vision recognition tasks. Although several studies have developed the denoising field employing…

计算机视觉与模式识别 · 计算机科学 2023-04-05 Haram Choi , Cheolwoong Na , Jinseop Kim , Jihoon Yang

The advancement of imaging devices and countless images generated everyday pose an increasingly high demand on image denoising, which still remains a challenging task in terms of both effectiveness and efficiency. To improve denoising…

图像与视频处理 · 电气工程与系统科学 2023-05-10 Zhaoming Kong , Fangxi Deng , Haomin Zhuang , Jun Yu , Lifang He , Xiaowei Yang

The resurgence of deep neural networks has created an alternative pathway for low-dose computed tomography denoising by learning a nonlinear transformation function between low-dose CT (LDCT) and normal-dose CT (NDCT) image pairs. However,…

图像与视频处理 · 电气工程与系统科学 2022-11-04 Sutanu Bera , Prabir Kumar Biswas

In video denoising, the adjacent frames often provide very useful information, but accurate alignment is needed before such information can be harnassed. In this work, we present a multi-alignment network, which generates multiple flow…

计算机视觉与模式识别 · 计算机科学 2022-07-12 Yaping Zhao , Haitian Zheng , Zhongrui Wang , Jiebo Luo , Edmund Y. Lam

When capturing and storing images, devices inevitably introduce noise. Reducing this noise is a critical task called image denoising. Deep learning has become the de facto method for image denoising, especially with the emergence of…

计算机视觉与模式识别 · 计算机科学 2023-03-24 Haoyu Chen , Jinjin Gu , Yihao Liu , Salma Abdel Magid , Chao Dong , Qiong Wang , Hanspeter Pfister , Lei Zhu

Image denoising is a classical problem in low level computer vision. Model-based optimization methods and deep learning approaches have been the two main strategies for solving the problem. Model-based optimization methods are flexible for…

计算机视觉与模式识别 · 计算机科学 2018-12-31 Chang Liu , Zhaowei Shang , Anyong Qin