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We seek to reconstruct sharp and noise-free high-dynamic range (HDR) video from a dual-exposure sensor that records different low-dynamic range (LDR) information in different pixel columns: Odd columns provide low-exposure, sharp, but noisy…

图像与视频处理 · 电气工程与系统科学 2021-04-14 Uğur Çoğalan , Mojtaba Bemana , Karol Myszkowski , Hans-Peter Seidel , Tobias Ritschel

In this work, we propose a purely geometrical approach for the robust matching of line segments for challenging stereo streams with severe illumination changes or High Dynamic Range (HDR) environments. To that purpose, we exploit the…

计算机视觉与模式识别 · 计算机科学 2018-09-26 Ruben Gomez-Ojeda , Javier Gonzalez-Jimenez

Transforming a thermal infrared image into a robust perceptual colour Visible image is an ill-posed problem due to the differences in their spectral domains and in the objects' representations. Objects appear in one spectrum but not…

计算机视觉与模式识别 · 计算机科学 2020-03-05 Feras Almasri , Olivier Debeir

Image matting aims to predict alpha values of elaborate uncertainty areas of natural images, like hairs, smoke, and spider web. However, existing methods perform poorly when faced with highly transparent foreground objects due to the large…

计算机视觉与模式识别 · 计算机科学 2023-03-14 Huanqia Cai , Fanglei Xue , Lele Xu , Lili Guo

In this letter, we propose a color-assisted robust framework for accurate LiDAR odometry and mapping (LOAM). Simultaneously receiving data from both the LiDAR and the camera, the framework utilizes the color information from the camera…

机器人学 · 计算机科学 2025-02-25 Yufei Lu , Yuetao Li , Zhizhou Jia , Qun Hao , Shaohui Zhang

An image processing unit (IPU), or image signal processor (ISP) for high dynamic range (HDR) imaging usually consists of demosaicing, white balancing, lens shading correction, color correction, denoising, and tone-mapping. Besides noise…

图像与视频处理 · 电气工程与系统科学 2023-03-27 Litao Hu , Huaijin Chen , Jan P. Allebach

Magnetic resonance (MR) imaging is commonly used in the clinical setting to non-invasively monitor the body. There exists a large variability in MR imaging due to differences in scanner hardware, software, and protocol design. Ideally, a…

图像与视频处理 · 电气工程与系统科学 2024-09-02 Savannah P. Hays , Samuel W. Remedios , Lianrui Zuo , Ellen M. Mowry , Scott D. Newsome , Peter A. Calabresi , Aaron Carass , Blake E. Dewey , Jerry L. Prince

We present an inexpensive architecture for converting a frequency-modulated continuous-wave LiDAR system into a compressive-sensing based depth-mapping camera. Instead of raster scanning to obtain depth-maps, compressive sensing is used to…

信号处理 · 电气工程与系统科学 2018-06-06 Daniel J. Lum , Samuel H. Knarr , John C. Howell

The low dynamic range (LDR) of common cameras fails to capture the rich contrast in natural scenes, resulting in loss of color and details in saturated pixels. Reconstructing the high dynamic range (HDR) of luminance present in the scene…

计算机视觉与模式识别 · 计算机科学 2024-09-24 Sebastian Dille , Chris Careaga , Yağız Aksoy

High Dynamic Range (HDR) images can be recovered from several Low Dynamic Range (LDR) images by existing Deep Neural Networks (DNNs) techniques. Despite the remarkable progress, DNN-based methods still generate ghosting artifacts when LDR…

计算机视觉与模式识别 · 计算机科学 2023-11-03 Qingsen Yan , Tao Hu , Yuan Sun , Hao Tang , Yu Zhu , Wei Dong , Luc Van Gool , Yanning Zhang

Problems in differentiable rendering often involve optimizing scene parameters that cause motion in image space. The gradients for such parameters tend to be sparse, leading to poor convergence. While existing methods address this sparsity…

图形学 · 计算机科学 2025-03-31 Ishit Mehta , Manmohan Chandraker , Ravi Ramamoorthi

This paper proposes a deep learning based method for colored transparent object matting from a single image. Existing approaches for transparent object matting often require multiple images and long processing times, which greatly hinder…

计算机视觉与模式识别 · 计算机科学 2019-10-08 Jamal Ahmed Rahim , Kwan-Yee Kenneth Wong

Intrinsic image decomposition and inverse rendering are long-standing problems in computer vision. To evaluate albedo recovery, most algorithms report their quantitative performance with a mean Weighted Human Disagreement Rate (WHDR) metric…

计算机视觉与模式识别 · 计算机科学 2023-06-30 Jiaye Wu , Sanjoy Chowdhury , Hariharmano Shanmugaraja , David Jacobs , Soumyadip Sengupta

The goal of image ordinal estimation is to estimate the ordinal label of a given image with a convolutional neural network. Existing methods are mainly based on ordinal regression and particularly focus on modeling the ordinal mapping from…

计算机视觉与模式识别 · 计算机科学 2023-01-18 Yiming Lei , Zilong Li , Yangyang Li , Junping Zhang , Hongming Shan

Transforming a thermal infrared image into a realistic RGB image is a challenging task. In this paper we propose a deep learning method to bridge this gap. We propose learning the transformation mapping using a coarse-to-fine generator that…

计算机视觉与模式识别 · 计算机科学 2018-11-06 Xiaodong Kuang , Xiubao Sui , Chengwei Liu , Yuan Liu , Qian Chen , Guohua Gu

This paper considers the problem of nonlinear dimensionality reduction. Unlike existing methods, such as LLE, ISOMAP, which attempt to unfold the true manifold in the low dimensional space, our algorithm tries to preserve the nonlinear…

计算机视觉与模式识别 · 计算机科学 2019-02-15 Xu Zhao , Zongli Jiang

A well-known diagnostic imaging modality, termed ultrasound tomography, was quickly developed for the detection of very small tumors whose sizes are smaller than the wavelength of the incident pressure wave without ionizing radiation,…

医学物理 · 物理学 2015-08-05 Tran Quang-Huy , Tran Duc-Tan , Huynh Huu Tue , Nguyen Linh-Trung

Outdoor lighting has extremely high dynamic range. This makes the process of capturing outdoor environment maps notoriously challenging since special equipment must be used. In this work, we propose an alternative approach. We first capture…

计算机视觉与模式识别 · 计算机科学 2017-11-08 Jinsong Zhang , Jean-François Lalonde

We introduce a linear dimensionality reduction technique preserving topological features via persistent homology. The method is designed to find linear projection $L$ which preserves the persistent diagram of a point cloud $\mathbb{X}$ via…

机器学习 · 统计学 2021-06-15 Byeongsu Yu , Kisung You

High dynamic range (HDR) imaging is an indispensable technique in modern photography. Traditional methods focus on HDR reconstruction from multiple images, solving the core problems of image alignment, fusion, and tone mapping, yet having a…

图像与视频处理 · 电气工程与系统科学 2022-10-31 Phuoc-Hieu Le , Quynh Le , Rang Nguyen , Binh-Son Hua