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Image Restoration has seen remarkable progress in recent years. Many generative models have been adapted to tackle the known restoration cases of images. However, the interest in benefiting from the frequency domain is not well explored…

计算机视觉与模式识别 · 计算机科学 2023-10-24 Bilel Benjdira , Anas M. Ali , Anis Koubaa

Photoacoustic imaging (PAI) is a non-invasive imaging modality that detects the ultrasound signal generated from tissue with light excitation. Photoacoustic computed tomography (PACT) uses unfocused large-area light to illuminate the target…

图像与视频处理 · 电气工程与系统科学 2022-04-13 Hengrong Lan , Jiali Gong , Fei Gao

We propose a novel algorithm for the joint refinement of structure and motion parameters from image data directly without relying on fixed and known correspondences. In contrast to traditional bundle adjustment (BA) where the optimal…

计算机视觉与模式识别 · 计算机科学 2016-08-09 Hatem Alismail , Brett Browning , Simon Lucey

Training Single-Image Super-Resolution (SISR) models using pixel-based regression losses can achieve high distortion metrics scores (e.g., PSNR and SSIM), but often results in blurry images due to insufficient recovery of high-frequency…

图像与视频处理 · 电气工程与系统科学 2024-09-10 Qiwen Zhu , Yanjie Wang , Shilv Cai , Liqun Chen , Jiahuan Zhou , Luxin Yan , Sheng Zhong , Xu Zou

Spectral unmixing aims at recovering the spectral signatures of materials, called endmembers, mixed in a hyperspectral or multispectral image, along with their abundances. A typical assumption is that the image contains one pure pixel per…

最优化与控制 · 数学 2018-02-22 Jeremy E. Cohen , Nicolas Gillis

In this paper, we propose a physics-inspired contrastive learning paradigm for low-light enhancement, called PIE. PIE primarily addresses three issues: (i) To resolve the problem of existing learning-based methods often training a LLE model…

计算机视觉与模式识别 · 计算机科学 2024-04-11 Dong Liang , Zhengyan Xu , Ling Li , Mingqiang Wei , Songcan Chen

The photometric stereo (PS) problem consists in reconstructing the 3D-surface of an object, thanks to a set of photographs taken under different lighting directions. In this paper, we propose a multi-scale architecture for PS which,…

计算机视觉与模式识别 · 计算机科学 2023-10-05 Clément Hardy , Yvain Quéau , David Tschumperlé

Image super-resolution (SR) is an underdetermined inverse problem, where a large number of plausible high-resolution images can explain the same downsampled image. Most current single image SR methods use empirical risk minimisation, often…

计算机视觉与模式识别 · 计算机科学 2017-02-28 Casper Kaae Sønderby , Jose Caballero , Lucas Theis , Wenzhe Shi , Ferenc Huszár

Image frames obtained in darkness are special. Just multiplying by a constant doesn't restore the image. Shot noise, quantization effects and camera non-linearities mean that colors and relative light levels are estimated poorly. Current…

计算机视觉与模式识别 · 计算机科学 2022-06-06 Sara Aghajanzadeh , David Forsyth

We consider the inverse problem of fitting atmospheric dispersion parameters based on time-resolved back-scattered differential absorption Lidar (DIAL) measurements. The obvious advantage of light-based remote sensing modalities is their…

偏微分方程分析 · 数学 2023-08-01 Robert Lung , Nick Polydorides

Panoramic Annular Lens (PAL) composed of few lenses has great potential in panoramic surrounding sensing tasks for mobile and wearable devices because of its tiny size and large Field of View (FoV). However, the image quality of tiny-volume…

图像与视频处理 · 电气工程与系统科学 2023-01-02 Qi Jiang , Hao Shi , Lei Sun , Shaohua Gao , Kailun Yang , Kaiwei Wang

Latent diffusion models (LDMs) have made significant advancements in the field of image generation in recent years. One major advantage of LDMs is their ability to operate in a compressed latent space, allowing for more efficient training…

计算机视觉与模式识别 · 计算机科学 2024-09-27 Christina Zhang , Simran Motwani , Matthew Yu , Ji Hou , Felix Juefei-Xu , Sam Tsai , Peter Vajda , Zijian He , Jialiang Wang

For many years, image over-segmentation into superpixels has been essential to computer vision pipelines, by creating homogeneous and identifiable regions of similar sizes. Such constrained segmentation problem would require a clear…

计算机视觉与模式识别 · 计算机科学 2025-09-24 Rémi Giraud , Michaël Clément

Human vision models are at the core of image processing. For instance, classical approaches to the problem of image quality are based on models that include knowledge about human vision. However, nowadays, deep learning approaches have…

计算机视觉与模式识别 · 计算机科学 2025-05-20 Jorge Vila-Tomás , Pablo Hernández-Cámara , Valero Laparra , Jesús Malo

Adversarial training (AT) trains models using adversarial examples (AEs), which are natural images modified with specific perturbations to mislead the model. These perturbations are constrained by a predefined perturbation budget $\epsilon$…

计算机视觉与模式识别 · 计算机科学 2024-06-04 Jiacheng Zhang , Feng Liu , Dawei Zhou , Jingfeng Zhang , Tongliang Liu

Face hallucination, which is the task of generating a high-resolution face image from a low-resolution input image, is a well-studied problem that is useful in widespread application areas. Face hallucination is particularly challenging…

计算机视觉与模式识别 · 计算机科学 2016-04-28 Oncel Tuzel , Yuichi Taguchi , John R. Hershey

This paper studies the problem of aligning a set of face images of the same individual into a normalized image while removing the outliers like partial occlusion, extreme facial expression as well as significant illumination variation. Our…

计算机视觉与模式识别 · 计算机科学 2019-10-22 Jiabo Huang , Xiaohua Xie , Wei-Shi Zheng

Foundation models have revolutionized computational pathology by achieving remarkable success in high-level diagnostic tasks, yet the critical challenge of low-level image enhancement remains largely unaddressed. Real-world pathology images…

计算机视觉与模式识别 · 计算机科学 2025-09-03 Ziyi Liu , Zhe Xu , Jiabo Ma , Wenqaing Li , Junlin Hou , Fuxiang Huang , Xi Wang , Ronald Cheong Kin Chan , Terence Tsz Wai Wong , Hao Chen

Methods that combine local and global features have recently shown excellent performance on multiple challenging deep image retrieval benchmarks, but their use of local features raises at least two issues. First, these local features simply…

计算机视觉与模式识别 · 计算机科学 2022-02-01 Philippe Weinzaepfel , Thomas Lucas , Diane Larlus , Yannis Kalantidis

The effective combination of the complementary information provided by the huge amount of unlabeled multi-sensor data (e.g., Synthetic Aperture Radar (SAR) and optical images) is a critical topic in remote sensing. Recently, contrastive…

图像与视频处理 · 电气工程与系统科学 2021-10-11 Yuxing Chen , Lorenzo Bruzzone