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Deep learning models for skin disease classification require large, diverse, and well-annotated datasets. However, such resources are often limited due to privacy concerns, high annotation costs, and insufficient demographic representation.…

Image and Video Processing · Electrical Eng. & Systems 2025-08-01 Jamil Fayyad , Nourhan Bayasi , Ziyang Yu , Homayoun Najjaran

Recent advances in text-to-image generation have primarily relied on extensive datasets and parameter-heavy architectures. These requirements severely limit accessibility for researchers and practitioners who lack substantial computational…

Computer Vision and Pattern Recognition · Computer Science 2025-03-12 Xianfeng Wu , Yajing Bai , Haoze Zheng , Harold Haodong Chen , Yexin Liu , Zihao Wang , Xuran Ma , Wen-Jie Shu , Xianzu Wu , Harry Yang , Ser-Nam Lim

Aligning Text-to-Image (T2I) generation models with human preferences increasingly relies on image reward models that score or rank generated images according to prompt alignment and perceptual quality. Existing reward models are commonly…

Artificial Intelligence · Computer Science 2026-05-22 Kuei-Chun Kao , Daixuan Huo , Yuanhao Ban , Cho-Jui Hsieh

Recent advancements in personalized image generation using diffusion models have been noteworthy. However, existing methods suffer from inefficiencies due to the requirement for subject-specific fine-tuning. This computationally intensive…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Xu Peng , Junwei Zhu , Boyuan Jiang , Ying Tai , Donghao Luo , Jiangning Zhang , Wei Lin , Taisong Jin , Chengjie Wang , Rongrong Ji

Latent diffusion models are the state-of-the-art for synthetic image generation. To align these models with human preferences, training the models using reinforcement learning on human feedback is crucial. Black et. al 2024 introduced…

Machine Learning · Computer Science 2024-04-09 Mo Kordzanganeh , Danial Keshvary , Nariman Arian

Text-to-image diffusion models produce impressive results but are frustrating tools for artists who desire fine-grained control. For example, a common use case is to create images of a specific instance in novel contexts, i.e.,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-28 Shengqu Cai , Eric Chan , Yunzhi Zhang , Leonidas Guibas , Jiajun Wu , Gordon Wetzstein

Direct preference optimization (DPO) is an effective technique to train language models to generate preferred over dispreferred responses. However, this binary "winner-takes-all" approach is suboptimal for vision-language models whose…

Computer Vision and Pattern Recognition · Computer Science 2026-03-27 Ansel Blume , Burak Uzkent , Shalini Chaudhuri , Garin Kessler

In the field of large language models (LLMs), aligning models with the diverse preferences of users is a critical challenge. Direct Preference Optimization (DPO) has played a key role in this area. It works by using pairs of preferences…

Computation and Language · Computer Science 2024-05-29 Yueqin Yin , Zhendong Wang , Yi Gu , Hai Huang , Weizhu Chen , Mingyuan Zhou

Recent text-to-image generation models have demonstrated incredible success in generating images that faithfully follow input prompts. However, the requirement of using words to describe a desired concept provides limited control over the…

Computer Vision and Pattern Recognition · Computer Science 2024-01-26 Senthil Purushwalkam , Akash Gokul , Shafiq Joty , Nikhil Naik

Large language models in the past have typically relied on some form of reinforcement learning with human feedback (RLHF) to better align model responses with human preferences. However, because of oft-observed instabilities when…

Computation and Language · Computer Science 2024-07-15 Xiangkun Hu , Tong He , David Wipf

Text-to-image diffusion models are a class of deep generative models that have demonstrated an impressive capacity for high-quality image generation. However, these models are susceptible to implicit biases that arise from web-scale…

Computer Vision and Pattern Recognition · Computer Science 2024-01-24 Yinan Zhang , Eric Tzeng , Yilun Du , Dmitry Kislyuk

Recent text-to-image (T2I) generative models allow for high-quality synthesis following either text instructions or visual examples. Despite their capabilities, these models face limitations in creating new, detailed creatures within…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Kam Woh Ng , Xiatian Zhu , Yi-Zhe Song , Tao Xiang

Direct Preference Optimization (DPO) has been demonstrated to be highly effective in mitigating hallucinations in Large Vision Language Models (LVLMs) by aligning their outputs more closely with human preferences. Despite the recent…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Jihao Gu , Yingyao Wang , Meng Cao , Pi Bu , Jun Song , Yancheng He , Shilong Li , Bo Zheng

Large Vision-Language Models (LVLMs) or multimodal large language models represent a significant advancement in artificial intelligence, enabling systems to understand and generate content across both visual and textual modalities. While…

Machine Learning · Computer Science 2025-09-09 Thanh Thi Nguyen , Campbell Wilson , Janis Dalins

Recent advancements in text-to-image (T2I) generation models have transformed the field. However, challenges persist in generating images that reflect demanding textual descriptions, especially for fine-grained details and unusual…

Multimedia · Computer Science 2025-02-21 Ran Li , Xiaomeng Jin , Heng ji

Customized generation aims to incorporate a novel concept into a pre-trained text-to-image model, enabling new generations of the concept in novel contexts guided by textual prompts. However, customized generation suffers from an inherent…

Computer Vision and Pattern Recognition · Computer Science 2024-12-09 Jian Jin , Yang Shen , Zhenyong Fu , Jian Yang

The alignment of language models with human preferences is vital for their application in real-world tasks. The problem is formulated as optimizing the model's policy to maximize the expected reward that reflects human preferences with…

Computation and Language · Computer Science 2024-06-06 Haozhe Ji , Cheng Lu , Yilin Niu , Pei Ke , Hongning Wang , Jun Zhu , Jie Tang , Minlie Huang

Text-to-3D generation, which synthesizes 3D assets according to an overall text description, has significantly progressed. However, a challenge arises when the specific appearances need customizing at designated viewpoints but referring…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Junkai Yan , Yipeng Gao , Qize Yang , Xihan Wei , Xuansong Xie , Ancong Wu , Wei-Shi Zheng

Text-to-image models (T2I) offer a new level of flexibility by allowing users to guide the creative process through natural language. However, personalizing these models to align with user-provided visual concepts remains a challenging…

Computer Vision and Pattern Recognition · Computer Science 2024-06-06 Yoad Tewel , Rinon Gal , Gal Chechik , Yuval Atzmon

Direct Preference Optimization (DPO) aligns Large Language Models with human preferences without the need for a separate reward model. However, DPO treats all tokens in responses equally, neglecting the differing importance of individual…

Computation and Language · Computer Science 2026-05-27 Chengyu Huang , Zhuohang Li , Sheng-Yen Chou , Claire Cardie
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