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To obtain high-quality positron emission tomography (PET) scans while reducing radiation exposure to the human body, various approaches have been proposed to reconstruct standard-dose PET (SPET) images from low-dose PET (LPET) images. One…

Image and Video Processing · Electrical Eng. & Systems 2023-08-22 Zeyu Han , Yuhan Wang , Luping Zhou , Peng Wang , Binyu Yan , Jiliu Zhou , Yan Wang , Dinggang Shen

Foundation models have achieved great success across diverse domains, including remote sensing (RS), thanks to their versatility and strong generalization abilities. However, most RS foundation models are designed for multispectral data,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-22 Bernardin Ligan , Khalide Jbilou , Fahd Kalloubi , Ahmed Ratnani

Efficient fine-tuning of pre-trained Text-to-Image (T2I) models involves adjusting the model to suit a particular task or dataset while minimizing computational resources and limiting the number of trainable parameters. However, it often…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Komal Kumar , Rao Muhammad Anwer , Fahad Shahbaz Khan , Salman Khan , Ivan Laptev , Hisham Cholakkal

Designing single-task image restoration models for specific degradation has seen great success in recent years. To achieve generalized image restoration, all-in-one methods have recently been proposed and shown potential for multiple…

Computer Vision and Pattern Recognition · Computer Science 2024-10-22 Hang Guo , Tao Dai , Yuanchao Bai , Bin Chen , Xudong Ren , Zexuan Zhu , Shu-Tao Xia

Parameter-Efficient Fine-Tuning (PEFT) is a popular class of techniques that strive to adapt large models in a scalable and resource-efficient manner. Yet, the mechanisms underlying their training performance and generalization remain…

Machine Learning · Computer Science 2026-02-10 Zahra Rahimi Afzal , Tara Esmaeilbeig , Mojtaba Soltanalian , Mesrob I. Ohannessian

Small animal PET scanners require high spatial resolution and good sensitivity. To reconstruct high-resolution images in 3D-PET, iterative methods, such as OSEM, are superior to analytical reconstruction algorithms, although their high…

Medical Physics · Physics 2007-05-23 J. L. Herraiz , S. Espana , J. J. Vaquero , M. Desco , J. M. Udias

Due to their substantial sizes, large language models (LLMs) are typically deployed within a single-backbone multi-tenant framework. In this setup, a single instance of an LLM backbone must cater to multiple users or tasks through the…

Computation and Language · Computer Science 2024-09-27 Tianfang Xie , Tianjing Li , Wei Zhu , Wei Han , Yi Zhao

Parameter-efficient finetuning (PEFT) has become the standard approach for adapting large language models, yet evaluations largely emphasize downstream accuracy while overlooking the retention of pretrained capabilities. We argue that PEFT…

Machine Learning · Computer Science 2026-05-28 Yangyi Huang , Ruotian Peng , Zeju Qiu , Jiale Kang , Yandong Wen , Bernhard Schölkopf , Weiyang Liu

Segment Anything Model (SAM) has received remarkable attention as it offers a powerful and versatile solution for object segmentation in images. However, fine-tuning SAM for downstream segmentation tasks under different scenarios remains a…

Computer Vision and Pattern Recognition · Computer Science 2023-12-19 Zelin Peng , Zhengqin Xu , Zhilin Zeng , Xiaokang Yang , Wei Shen

Positron emission tomography (PET) is a cornerstone of modern radiology. The ability to detect cancer and metastases in whole body scans fundamentally changed cancer diagnosis and treatment. One of the main bottlenecks in the clinical…

Computer Vision and Pattern Recognition · Computer Science 2022-04-28 Ida Häggström , C. Ross Schmidtlein , Gabriele Campanella , Thomas J. Fuchs

Existing parameter-efficient fine-tuning (PEFT) methods primarily fall into two categories: addition-based and selective in-situ adaptation. The former, such as LoRA, introduce additional modules to adapt the model to downstream tasks,…

Machine Learning · Computer Science 2025-10-23 Zhi Zhang , Yixian Shen , Congfeng Cao , Ekaterina Shutova

Large-scale foundation models have demonstrated remarkable versatility across a wide range of downstream tasks. However, fully fine-tuning these models incurs prohibitive computational costs, motivating the development of…

Machine Learning · Computer Science 2025-05-30 Chongjie Si , Xuankun Yang , Muqing Liu , Yadao Wang , Xiaokang Yang , Wenbo Su , Bo Zheng , Wei Shen

Foundation models excel across diverse tasks, but adapting them to specialized applications often requires fine-tuning, an approach that is memory and compute-intensive. Parameter-efficient fine-tuning (PEFT) methods mitigate this by…

Machine Learning · Computer Science 2026-04-24 Abel Gurung , Joseph Campbell

Fine-tuning large pre-trained foundation models often yields excellent downstream performance but is prohibitively expensive when updating all parameters. Parameter-efficient fine-tuning (PEFT) methods such as LoRA alleviate this by…

Machine Learning · Computer Science 2025-11-25 Yibo Zhong , Haoxiang Jiang , Lincan Li , Ryumei Nakada , Tianci Liu , Linjun Zhang , Huaxiu Yao , Haoyu Wang

In this work, we present compelling evidence that controlling model capacity during fine-tuning can effectively mitigate memorization in diffusion models. Specifically, we demonstrate that adopting Parameter-Efficient Fine-Tuning (PEFT)…

Computer Vision and Pattern Recognition · Computer Science 2024-10-30 Raman Dutt , Pedro Sanchez , Ondrej Bohdal , Sotirios A. Tsaftaris , Timothy Hospedales

Positron Emission Tomography (PET) imaging is a vital tool in medical diagnostics, offering detailed insights into molecular processes within the human body. However, PET images often suffer from complicated noise, which can obscure…

Computer Vision and Pattern Recognition · Computer Science 2026-01-30 Xuehua Ye , Hongxu Yang , Adam J. Schwarz

Parameter-efficient fine-tuning (PEFT) methods have emerged as a practical solution for adapting large foundation models to downstream tasks, reducing computational and memory costs by updating only a small subset of parameters. Among them,…

Machine Learning · Computer Science 2025-12-30 Guoan Wan , Tianyu Chen , Fangzheng Feng , Haoyi Zhou , Runhua Xu

Parameter-efficient fine-tuning (PEFT) has emerged as a practical solution for adapting large language models (LLMs) to custom datasets with significantly reduced computational cost. When carrying out PEFT under collaborative learning…

Cryptography and Security · Computer Science 2025-04-30 Jin Xie , Ruishi He , Songze Li , Xiaojun Jia , Shouling Ji

Positron emission tomography (PET) is widely used for clinical diagnosis. As PET suffers from low resolution and high noise, numerous efforts try to incorporate anatomical priors into PET image reconstruction, especially with the…

Medical Physics · Physics 2019-12-17 Nuobei Xie , Kuang Gong , Ning Guo , Zhixin Qin , Zhifang Wu , Huafeng Liu , Quanzheng Li

Low-count PET is an efficient way to reduce radiation exposure and acquisition time, but the reconstructed images often suffer from low signal-to-noise ratio (SNR), thus affecting diagnosis and other downstream tasks. Recent advances in…

Image and Video Processing · Electrical Eng. & Systems 2023-10-09 Bo Zhou , Huidong Xie , Qiong Liu , Xiongchao Chen , Xueqi Guo , Zhicheng Feng , Jun Hou , S. Kevin Zhou , Biao Li , Axel Rominger , Kuangyu Shi , James S. Duncan , Chi Liu
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