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Capturing scenes with a high dynamic range is crucial to reproducing images that appear similar to those seen by the human visual system. Despite progress in developing data-driven deep learning approaches for converting low dynamic range…

Image and Video Processing · Electrical Eng. & Systems 2021-03-24 Edwin Pan , Anthony Vento

We propose a multi-layer variational autoencoder method, we call HR-VQVAE, that learns hierarchical discrete representations of the data. By utilizing a novel objective function, each layer in HR-VQVAE learns a discrete representation of…

Computer Vision and Pattern Recognition · Computer Science 2022-08-10 Mohammad Adiban , Kalin Stefanov , Sabato Marco Siniscalchi , Giampiero Salvi

Complex-valued neural networks (CVNNs) are an emerging field of research in neural networks due to their potential representational properties for audio, image, and physiological signals. It is common in signal processing to transform…

Machine Learning · Computer Science 2015-11-20 Andy M. Sarroff , Victor Shepardson , Michael A. Casey

One of the main open challenges in visual odometry (VO) is the robustness to difficult illumination conditions or high dynamic range (HDR) environments. The main difficulties in these situations come from both the limitations of the sensors…

Computer Vision and Pattern Recognition · Computer Science 2018-04-11 Ruben Gomez-Ojeda , Zichao Zhang , Javier Gonzalez-Jimenez , Davide Scaramuzza

Existing methods for spectral reconstruction usually learn a discrete mapping from RGB images to a number of spectral bands. However, this modeling strategy ignores the continuous nature of spectral signature. In this paper, we propose…

Computer Vision and Pattern Recognition · Computer Science 2022-09-01 Ruikang Xu , Mingde Yao , Chang Chen , Lizhi Wang , Zhiwei Xiong

For collecting high-quality high-resolution (HR) MR image, we propose a novel image reconstruction network named IREM, which is trained on multiple low-resolution (LR) MR images and achieve an arbitrary up-sampling rate for HR image…

Image and Video Processing · Electrical Eng. & Systems 2021-06-30 Qing Wu , Yuwei Li , Lan Xu , Ruiming Feng , Hongjiang Wei , Qing Yang , Boliang Yu , Xiaozhao Liu , Jingyi Yu , Yuyao Zhang

Multi-view learning is a learning problem that utilizes the various representations of an object to mine valuable knowledge and improve the performance of learning algorithm, and one of the significant directions of multi-view learning is…

Machine Learning · Computer Science 2022-01-11 Run-kun Lu , Jian-wei Liu , Yuan-fang Wang , Hao-jie Xie , Xin Zuo

Synthetic aperture radar (SAR) is widely used for ground surface classification since it utilizes information on vegetation and soil unavailable in optical observation. Image classification often employs convolutional neural networks.…

Signal Processing · Electrical Eng. & Systems 2021-08-31 Bungo Konishi , Akira Hirose , Ryo Natsuaki

Reconstruction of high-quality HDR images is at the core of modern computational photography. Significant progress has been made with multi-frame HDR reconstruction methods, producing high-resolution, rich and accurate color reconstructions…

Computer Vision and Pattern Recognition · Computer Science 2022-03-29 Richard Shaw , Sibi Catley-Chandar , Ales Leonardis , Eduardo Perez-Pellitero

We present a learning-based method to infer plausible high dynamic range (HDR), omnidirectional illumination given an unconstrained, low dynamic range (LDR) image from a mobile phone camera with a limited field of view (FOV). For training…

Computer Vision and Pattern Recognition · Computer Science 2019-04-03 Chloe LeGendre , Wan-Chun Ma , Graham Fyffe , John Flynn , Laurent Charbonnel , Jay Busch , Paul Debevec

High dynamic range imaging (HDRI) for real-world dynamic scenes is challenging because moving objects may lead to hybrid degradation of low dynamic range and motion blur. Existing event-based approaches only focus on a separate task, while…

Computer Vision and Pattern Recognition · Computer Science 2024-04-05 Li Xiaopeng , Zeng Zhaoyuan , Fan Cien , Zhao Chen , Deng Lei , Yu Lei

High dynamic range (HDR) imaging is a technique that allows an extensive dynamic range of exposures, which is important in image processing, computer graphics, and computer vision. In recent years, there has been a significant advancement…

Image and Video Processing · Electrical Eng. & Systems 2021-11-12 Lin Wang , Kuk-Jin Yoon

In computer vision and image processing tasks, image fusion has evolved into an attractive research field. However, recent existing image fusion methods are mostly built on pixel-level operations, which may produce unacceptable artifacts…

Computer Vision and Pattern Recognition · Computer Science 2019-05-29 Lihua Jian , Xiaomin Yang , Zheng Liu , Gwanggil Jeon , Mingliang Gao , David Chisholm

High dynamic range (HDR) imaging is still a challenging task in modern digital photography. Recent research proposes solutions that provide high-quality acquisition but at the cost of a very large number of operations and a slow inference…

Computer Vision and Pattern Recognition · Computer Science 2023-02-13 Steven Tel , Barthélémy Heyrman , Dominique Ginhac

Three-dimensional synthetic aperture radar (3D SAR) is an advanced active microwave imaging technology widely utilized in remote sensing area. To achieve high-resolution 3D imaging,3D SAR requires observations from multiple aspects and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-12 Da Li , Guoqiang Zhao , Chen Yao , Kaiqiang Zhu , Houjun Sun , Jiacheng Bao , Maokun Li

Event cameras are innovative neuromorphic sensors that asynchronously capture the scene dynamics. Due to the event-triggering mechanism, such cameras record event streams with much shorter response latency and higher intensity sensitivity…

Computer Vision and Pattern Recognition · Computer Science 2024-09-26 Yunhao Zou , Ying Fu , Tsuyoshi Takatani , Yinqiang Zheng

High-dynamic-range (HDR) imaging is crucial for many computer graphics and vision applications. Yet, acquiring HDR images with a single shot remains a challenging problem. Whereas modern deep learning approaches are successful at…

Image and Video Processing · Electrical Eng. & Systems 2019-08-05 Christopher A. Metzler , Hayato Ikoma , Yifan Peng , Gordon Wetzstein

Compression and reconstruction of visual data have been widely studied in the computer vision community, even before the popularization of deep learning. More recently, some have used deep learning to improve or refine existing pipelines,…

Computer Vision and Pattern Recognition · Computer Science 2022-11-21 Hao Chen , Matt Gwilliam , Bo He , Ser-Nam Lim , Abhinav Shrivastava

The reconstruction of high dynamic range (HDR) images from multi-exposure low dynamic range (LDR) images in dynamic scenes presents significant challenges, especially in preserving and restoring information in oversaturated regions and…

Computer Vision and Pattern Recognition · Computer Science 2024-03-08 Huafeng Li , Zhenmei Yang , Yafei Zhang , Dapeng Tao , Zhengtao Yu

Volume Rendering is an important technique for visualizing three-dimensional scalar data grids and is commonly employed for scientific and medical image data. Direct Volume Rendering (DVR) is a well established and efficient rendering…

Graphics · Computer Science 2021-06-11 Jakob Weiss , Nassir Navab