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Large-scale generative models, such as text-to-image diffusion models, have garnered widespread attention across diverse domains due to their creative and high-fidelity image generation. Nonetheless, existing large-scale diffusion models…

计算机视觉与模式识别 · 计算机科学 2024-08-28 Younghyun Kim , Geunmin Hwang , Junyu Zhang , Eunbyung Park

Photoacoustic imaging (PAI), by combining high optical contrast with ultrasonic resolution, offers a promising noninvasive approach for dynamic monitoring of cerebral vasculature. However, transcranial PAI still faces significant challenges…

Restoring real-world degraded images, such as old photographs or low-resolution images, presents a significant challenge due to the complex, mixed degradations they exhibit, such as scratches, color fading, and noise. Recent data-driven…

计算机视觉与模式识别 · 计算机科学 2025-05-28 Peng Xiao , Hongbo Zhao , Yijun Wang , Jianxin Lin

Photo-acoustic tomography is a newly developed hybrid imaging modality that combines a high-resolution modality with a high-contrast modality. We analyze the reconstruction of diffusion and absorption parameters in an elliptic equation and…

偏微分方程分析 · 数学 2015-06-04 Jie Chen , Yang Yang

Foundation models have rapidly evolved and have achieved significant accomplishments in computer vision tasks. Specifically, the prompt mechanism conveniently allows users to integrate image prior information into the model, making it…

计算机视觉与模式识别 · 计算机科学 2024-04-12 Handi Deng , Yucheng Zhou , Jiaxuan Xiang , Liujie Gu , Yan Luo , Hai Feng , Mingyuan Liu , Cheng Ma

Ultrasound curve angle (UCA) measurement provides a radiation-free and reliable evaluation for scoliosis based on ultrasound imaging. However, degraded image quality, especially in difficult-to-image patients, can prevent clinical experts…

图像与视频处理 · 电气工程与系统科学 2024-09-26 Yihao Zhou , Zixun Huang , Timothy Tin-Yan Lee , Chonglin Wu , Kelly Ka-Lee Lai , De Yang , Alec Lik-hang Hung , Jack Chun-Yiu Cheng , Tsz-Ping Lam , Yong-ping Zheng

The problem of inpainting involves reconstructing the missing areas of an image. Inpainting has many applications, such as reconstructing old damaged photographs or removing obfuscations from images. In this paper we present the directional…

计算机视觉与模式识别 · 计算机科学 2015-11-12 Jan Deriu , Rolf Jagerman , Kai-En Tsay

Despite its wide use in medicine, ultrasound imaging faces several challenges related to its poor signal-to-noise ratio and several sources of noise and artefacts. Enhancing ultrasound image quality involves balancing concurrent factors…

计算机视觉与模式识别 · 计算机科学 2024-10-28 Yuxin Zhang , Clément Huneau , Jérôme Idier , Diana Mateus

Diffusion models have recently achieved success in solving Bayesian inverse problems with learned data priors. Current methods build on top of the diffusion sampling process, where each denoising step makes small modifications to samples…

机器学习 · 计算机科学 2025-08-19 Bingliang Zhang , Wenda Chu , Julius Berner , Chenlin Meng , Anima Anandkumar , Yang Song

In the process of parametric optical image amplification, images are formed at new frequencies in addition to the amplified original image. We show that the parametric multiplexing of optical images can be used to produce an image with…

量子物理 · 物理学 2019-03-27 D. A. Balakin , A. S. Chirkin

Conditional image generation has paved the way for several breakthroughs in image editing, generating stock photos and 3-D object generation. This continues to be a significant area of interest with the rise of new state-of-the-art methods…

计算机视觉与模式识别 · 计算机科学 2022-05-10 Vedant Singh , Surgan Jandial , Ayush Chopra , Siddharth Ramesh , Balaji Krishnamurthy , Vineeth N. Balasubramanian

Non-invasively focusing light into strongly scattering media, such as biological tissue, is highly desirable but challenging. Recently, wavefront shaping technologies guided by ultrasonic encoding or photoacoustic sensing have been…

光学 · 物理学 2014-02-05 Puxiang Lai , Lidai Wang , Jian Wei Tay , Lihong V. Wang

Photoacoustic imaging has emerged in the past decades. Compared with the traditional medical imaging mode, it has better imaging performance and has great development potential in the field of biological imaging. In traditional…

医学物理 · 物理学 2020-09-03 Xianlin Song , Jianshuang Wei , Jianmin Xiong , Lingfang Song

Photoacoustic tomography (PAT) is a hybrid imaging modality that intends to construct high-resolution images of optical properties of heterogeneous media from measured acoustic data generated by the photoacoustic effect. To date, most of…

数值分析 · 数学 2019-08-07 Christina Frederick , Kui Ren , Sarah Vallélian

Photoacoustic tomography (PAT) is a non-invasive imaging modality that requires recovering the initial data of the wave equation from certain measurements of the solution outside the object. In the standard PAT measurement setup, the used…

偏微分方程分析 · 数学 2021-12-07 Linh V. Nguyen , Markus Haltmeier , Richard Kowar , Ngoc Do

Diffusion models for image generation have been a subject of increasing interest due to their ability to generate diverse, high-quality images. Image generation has immense potential in medical imaging because open-source medical images are…

计算机视觉与模式识别 · 计算机科学 2025-02-13 Benoit Freiche , Anthony El-Khoury , Ali Nasiri-Sarvi , Mahdi S. Hosseini , Damien Garcia , Adrian Basarab , Mathieu Boily , Hassan Rivaz

Accurate correspondence matching in coronary angiography images is crucial for reconstructing 3D coronary artery structures, which is essential for precise diagnosis and treatment planning of coronary artery disease (CAD). Traditional…

计算机视觉与模式识别 · 计算机科学 2025-04-02 Lin Zhao , Xin Yu , Yikang Liu , Xiao Chen , Eric Z. Chen , Terrence Chen , Shanhui Sun

We introduce a new technique for generating retinal fundus images that have anatomically accurate vascular structures, using diffusion models. We generate artery/vein masks to create the vascular structure, which we then condition to…

图像与视频处理 · 电气工程与系统科学 2023-05-12 Sojung Go , Younghoon Ji , Sang Jun Park , Soochahn Lee

A new approach for continuous and non-invasive monitoring of the glucose concentration in human epidermis has been suggested recently. This method is based on photoacoustic (PA) analysis of human interstitial fluid. The measurement can be…

计算物理 · 物理学 2015-07-21 Bernd Baumann , Marcus Wolff , Mark Teschner

We show that diffusion models can achieve image sample quality superior to the current state-of-the-art generative models. We achieve this on unconditional image synthesis by finding a better architecture through a series of ablations. For…

机器学习 · 计算机科学 2021-06-02 Prafulla Dhariwal , Alex Nichol