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Inference-time computation methods enhance the performance of Large Language Models (LLMs) by leveraging additional computational resources to achieve superior results. Common techniques, such as Best-of-N sampling, Majority Voting, and…

Computation and Language · Computer Science 2024-11-27 Chia-Yu Hung , Navonil Majumder , Ambuj Mehrish , Soujanya Poria

In recent years, motion generative models have undergone significant advancement, yet pose challenges in aligning with downstream objectives. Recent studies have shown that using differentiable rewards to directly align the preference of…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Xiaofeng Tan , Wanjiang Weng , Haodong Lei , Hongsong Wang

Text-to-image (T2I) diffusion models have become prominent tools for generating high-fidelity images from text prompts. However, when trained on unfiltered internet data, these models can produce unsafe, incorrect, or stylistically…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Rohit Jena , Ali Taghibakhshi , Sahil Jain , Gerald Shen , Nima Tajbakhsh , Arash Vahdat

Despite strong image-generation performance, diffusion models' reconstruction objectives limit alignment with human preferences. RL enables such alignment through explicit rewards. However, most studies apply RL to the full denoising…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Renye Yan , Jikang Cheng , Shikun Sun , Yi Sun , You Wu , Wei Peng , Zongwei Wang , Ling Liang , Junliang Xing , Yimao Cai

Aligning text-to-image diffusion model (T2I) with preference has been gaining increasing research attention. While prior works exist on directly optimizing T2I by preference data, these methods are developed under the bandit assumption of a…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Shentao Yang , Tianqi Chen , Mingyuan Zhou

With the development of Artificial Intelligence, numerous real-world tasks have been accomplished using technology integrated with deep learning. To achieve optimal performance, deep neural networks typically require large volumes of data…

Machine Learning · Computer Science 2025-05-09 Yuren Zhang , Zhongnan Pu , Lei Jing

Users often possess a clear visual intent but struggle to articulate it precisely in language. This intention-expression gap makes aligning generated images with latent visual preferences a fundamental challenge in text-to-image diffusion…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Wenxi Wang , Hongbin Liu , Mingqian Li , Junyan Yuan , Junqi Zhang

Aligning LLMs with user preferences is crucial for real-world use but often requires costly fine-tuning or expensive inference, forcing trade-offs between alignment quality and computational cost. Existing inference-time methods typically…

Machine Learning · Computer Science 2025-08-08 Mason Nakamura , Saaduddin Mahmud , Kyle H. Wray , Hamed Zamani , Shlomo Zilberstein

As a highly expressive generative model, diffusion models have demonstrated exceptional success across various domains, including image generation, natural language processing, and combinatorial optimization. However, as data distributions…

Machine Learning · Computer Science 2025-10-27 Myunsoo Kim , Donghyeon Ki , Seong-Woong Shim , Byung-Jun Lee

We have made significant progress towards building foundational video diffusion models. As these models are trained using large-scale unsupervised data, it has become crucial to adapt these models to specific downstream tasks. Adapting…

Computer Vision and Pattern Recognition · Computer Science 2024-07-12 Mihir Prabhudesai , Russell Mendonca , Zheyang Qin , Katerina Fragkiadaki , Deepak Pathak

Reward models play a key role in aligning language model applications towards human preferences. However, this setup creates an incentive for the language model to exploit errors in the reward model to achieve high estimated reward, a…

We introduce Diffusion Augmented Agents (DAAG), a novel framework that leverages large language models, vision language models, and diffusion models to improve sample efficiency and transfer learning in reinforcement learning for embodied…

Machine Learning · Computer Science 2024-07-31 Norman Di Palo , Leonard Hasenclever , Jan Humplik , Arunkumar Byravan

Unsupervised plain graph alignment (UPGA) aims to align corresponding nodes across two graphs without any auxiliary information. Existing UPGA methods rely on structural consistency while neglecting the inherent structural differences in…

Social and Information Networks · Computer Science 2025-06-24 Boyan Wang , Weijie Feng , Jinyang Huang , Dan Guo , Zhi Liu

This paper studies the fast adaptive beamforming for the multiuser multiple-input single-output downlink. Existing deep learning-based approaches assume that training and testing channels follow the same distribution which causes task…

Information Theory · Computer Science 2021-09-21 Juping Zhang , Yi Yuan , Gan Zheng , Ioannis Krikidis , Kai-Kit Wong

Well-designed prompts can guide text-to-image models to generate amazing images. However, the performant prompts are often model-specific and misaligned with user input. Instead of laborious human engineering, we propose prompt adaptation,…

Computation and Language · Computer Science 2024-01-01 Yaru Hao , Zewen Chi , Li Dong , Furu Wei

Denoising diffusion models have been a mainstream approach for image generation, however, training these models often suffers from slow convergence. In this paper, we discovered that the slow convergence is partly due to conflicting…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Tiankai Hang , Shuyang Gu , Chen Li , Jianmin Bao , Dong Chen , Han Hu , Xin Geng , Baining Guo

While thinking-aware generation aims to improve performance on complex tasks, we identify a critical failure mode where existing sequential, autoregressive approaches can paradoxically degrade performance due to error propagation. To…

Computer Vision and Pattern Recognition · Computer Science 2025-11-19 Ye Tian , Ling Yang , Jiongfan Yang , Anran Wang , Yu Tian , Jiani Zheng , Haochen Wang , Zhiyang Teng , Zhuochen Wang , Yinjie Wang , Yunhai Tong , Mengdi Wang , Xiangtai Li

Beam alignment is a key challenge in directional mmWave and THz systems, where narrow beams require accurate yet low-overhead training. Existing learning-based approaches typically predict a single beam and do not quantify uncertainty,…

Signal Processing · Electrical Eng. & Systems 2026-04-14 Esraa Fahmy Othman , Lina Bariah , Merouane Debbah

Reinforcement learning (RL) has become a standard technique for post-training diffusion-based image synthesis models, as it enables learning from reward signals to explicitly improve desirable aspects such as image quality and prompt…

Computer Vision and Pattern Recognition · Computer Science 2026-03-16 David McAllister , Miika Aittala , Tero Karras , Janne Hellsten , Angjoo Kanazawa , Timo Aila , Samuli Laine

The rapid adoption of text-to-image diffusion models in society underscores an urgent need to address their biases. Without interventions, these biases could propagate a skewed worldview and restrict opportunities for minority groups. In…

Machine Learning · Computer Science 2024-03-18 Xudong Shen , Chao Du , Tianyu Pang , Min Lin , Yongkang Wong , Mohan Kankanhalli