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Radiography Report Generation (RRG) has gained significant attention in medical image analysis as a promising tool for alleviating the growing workload of radiologists. However, despite numerous advancements, existing methods have yet to…

计算机视觉与模式识别 · 计算机科学 2025-09-29 Valentin Samokhin , Boris Shirokikh , Mikhail Goncharov , Dmitriy Umerenkov , Maksim Bobrin , Ivan Oseledets , Dmitry Dylov , Mikhail Belyaev

Recent studies have demonstrated the efficacy of integrating Group Relative Policy Optimization (GRPO) into flow matching models, particularly for text-to-image and text-to-video generation. However, we find that directly applying these…

计算机视觉与模式识别 · 计算机科学 2026-05-27 Jin Wang , Jianxiang Lu , Guangzheng Xu , Comi Chen , Haoyu Yang , Linqing Wang , Peng Chen , Mingtao Chen , Zhichao Hu , Longhuang Wu , Shuai Shao , Qinglin Lu , Ping Luo

Integrating human feedback to align text-to-speech (TTS) system outputs with human preferences has proven to be an effective approach for enhancing the robustness of language model-based TTS systems. Current approaches primarily focus on…

音频与语音处理 · 电气工程与系统科学 2025-12-29 Jixun Yao , Yuguang Yang , Yu Pan , Yuan Feng , Ziqian Ning , Jianhao Ye , Hongbin Zhou , Lei Xie

Direct Preference Optimization (DPO) has gained significant attention for its simplicity and computational efficiency in aligning large language models (LLMs). Recent advancements have extended DPO to multimodal scenarios, achieving strong…

计算与语言 · 计算机科学 2025-05-27 Yeyuan Wang , Dehong Gao , Rujiao Long , Lei Yi , Linbo Jin , Libin Yang , Xiaoyan Cai

Foreground-conditioned inpainting, which aims at generating a harmonious background for a given foreground subject based on the text prompt, is an important subfield in controllable image generation. A common challenge in current methods,…

计算机视觉与模式识别 · 计算机科学 2025-12-18 Qirui Li , Yizhe Tang , Ran Yi , Guangben Lu , Fangyuan Zou , Peng Shu , Huan Yu , Jie Jiang

Direct Preference Optimization (DPO) is a principled, scalable alternative to RLHF for aligning large language models from pairwise preferences, but its internal geometric footprint remains undercharacterized, limiting audits, checkpoint…

机器学习 · 计算机科学 2026-01-13 Arion Das , Partha Pratim Saha , Amit Dhanda , Vinija Jain , Aman Chadha , Amitava Das

With the rapid development and widespread application of Large Language Models (LLMs), their potential safety risks have attracted widespread attention. Reinforcement Learning from Human Feedback (RLHF) has been adopted to enhance the…

Recent advances in diffusion models have improved Real-World Image Super-Resolution (Real-ISR), but existing methods lack human feedback integration, risking misalignment with human preference and may leading to artifacts, hallucinations…

计算机视觉与模式识别 · 计算机科学 2025-04-22 Miaomiao Cai , Simiao Li , Wei Li , Xudong Huang , Hanting Chen , Jie Hu , Yunhe Wang

Preference-based alignment objectives have been widely adopted, from RLHF-style pairwise learning in large language models to emerging applications in recommender systems. Yet, existing work rarely examines how Direct Preference…

信息检索 · 计算机科学 2026-04-01 Hejin Huang , Jusheng Zhang , Kaitong Cai , Jian Wang , Rong Pan

Direct Alignment Algorithms (DAAs), such as Direct Preference Optimization (DPO) and Simple Preference Optimization (SimPO), have emerged as efficient alternatives to Reinforcement Learning from Human Feedback (RLHF) algorithms for aligning…

计算与语言 · 计算机科学 2026-04-17 Zeguan Xiao , Yun Chen , Guanhua Chen , Ke Tang

Preference based alignment objectives implicitly assume that all human preferences are expressed with equal strength. In practice, however, preference strength varies across individuals and contexts -- a phenomenon established in behavioral…

机器学习 · 计算机科学 2026-01-13 Saki Imai , Pedram Heydari , Anthony Sicilia , Asteria Kaeberlein , Katherine Atwell , Malihe Alikhani

Text-to-audio (T2A) generation has advanced considerably in recent years, yet existing methods continue to face challenges in accurately rendering complex text prompts, particularly those involving intricate audio effects, and achieving…

音频与语音处理 · 电气工程与系统科学 2026-03-03 Yi Gu , Yanqing Liu , Chen Yang , Sheng Zhao

Recent advancements in video generation have enabled the creation of high-quality, visually compelling videos. However, generating videos that adhere to the laws of physics remains a critical challenge for applications requiring realism and…

计算机视觉与模式识别 · 计算机科学 2025-08-15 Harold Haodong Chen , Haojian Huang , Qifeng Chen , Harry Yang , Ser-Nam Lim

Code generation models have shown significant potential for automating programming tasks. However, the challenge of generating accurate and reliable code persists due to the highly complex and long-reasoning nature of the task. Even…

软件工程 · 计算机科学 2025-06-04 Kechi Zhang , Ge Li , Jia Li , Yihong Dong , Jia Li , Zhi Jin

Aligning large language models (LLMs) with human values and intentions is crucial for their utility, honesty, and safety. Reinforcement learning from human feedback (RLHF) is a popular approach to achieve this alignment, but it faces…

机器学习 · 计算机科学 2025-07-22 Junkang Wu , Xue Wang , Zhengyi Yang , Jiancan Wu , Jinyang Gao , Bolin Ding , Xiang Wang , Xiangnan He

Video stereo matching is the task of estimating consistent disparity maps from rectified stereo videos. There is considerable scope for improvement in both datasets and methods within this area. Recent learning-based methods often focus on…

计算机视觉与模式识别 · 计算机科学 2026-03-31 Junpeng Jing , Ye Mao , Anlan Qiu , Krystian Mikolajczyk

Recent advances in audio-driven portrait animation have demonstrated impressive capabilities. However, existing methods struggle to align with fine-grained human preferences across multiple dimensions, such as motion naturalness, lip-sync…

计算机视觉与模式识别 · 计算机科学 2025-08-18 MengChao Wang , Qiang Wang , Fan Jiang , Mu Xu

Human image generation is a key focus in image synthesis due to its broad applications, but even slight inaccuracies in anatomy, pose, or details can compromise realism. To address these challenges, we explore Direct Preference Optimization…

计算机视觉与模式识别 · 计算机科学 2025-04-10 Sanghyeon Na , Yonggyu Kim , Hyunjoon Lee

Direct Preference Optimisation (DPO) is widely used for safety alignment in large language models. However, prior work shows it is brittle and exhibits poor out-of-distribution (OOD) generalisation. In this paper, we investigate whether…

机器学习 · 计算机科学 2026-05-27 Sandeep Kumar , Virginia Smith , Chhavi Yadav

The rapidly increasing capabilities of large language models (LLMs) raise an urgent need to align AI systems with diverse human preferences to simultaneously enhance their usefulness and safety, despite the often conflicting nature of these…

机器学习 · 计算机科学 2024-03-06 Zixuan Liu , Xiaolin Sun , Zizhan Zheng