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Diffusion models for continuous data gained widespread adoption owing to their high quality generation and control mechanisms. However, controllable diffusion on discrete data faces challenges given that continuous guidance methods do not…

Diffusion models have emerged as a powerful framework for generative modeling, with guidance techniques playing a crucial role in enhancing sample quality. Despite their empirical success, a comprehensive theoretical understanding of the…

Machine Learning · Statistics 2025-05-05 Gen Li , Yuchen Jiao

Conditional image generative models hold considerable promise to produce infinite amounts of synthetic training data. Yet, recent progress in generation quality has come at the expense of generation diversity, limiting the utility of these…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Nicola Dall'Asen , Xiaofeng Zhang , Reyhane Askari Hemmat , Melissa Hall , Jakob Verbeek , Adriana Romero-Soriano , Michal Drozdzal

Classifier-Free Guidance (CFG) enhances the quality and condition adherence of text-to-image diffusion models. It operates by combining the conditional and unconditional predictions using a fixed weight. However, recent works vary the…

Computer Vision and Pattern Recognition · Computer Science 2025-01-23 Xi Wang , Nicolas Dufour , Nefeli Andreou , Marie-Paule Cani , Victoria Fernandez Abrevaya , David Picard , Vicky Kalogeiton

Personalizing text-to-image diffusion models is crucial for adapting the pre-trained models to specific target concepts, enabling diverse image generation. However, fine-tuning with few images introduces an inherent trade-off between…

Computer Vision and Pattern Recognition · Computer Science 2025-08-04 Sunghyun Park , Seokeon Choi , Hyoungwoo Park , Sungrack Yun

Classifier-free guidance has become a staple for conditional generation with denoising diffusion models. However, a comprehensive understanding of classifier-free guidance is still missing. In this work, we carry out an empirical study to…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Xiaoming Zhao , Alexander G. Schwing

This research focuses on the development and enhancement of text-to-image denoising diffusion models, addressing key challenges such as limited sample diversity and training instability. By incorporating Classifier-Free Guidance (CFG) and…

Computer Vision and Pattern Recognition · Computer Science 2025-03-10 Rajdeep Roshan Sahu

Diffusion models have shown remarkable success across generative tasks, yet their high computational demands challenge deployment on resource-limited platforms. This paper investigates a critical question for compute-optimal diffusion model…

Computer Vision and Pattern Recognition · Computer Science 2025-08-11 Zhenbang Du , Yonggan Fu , Lifu Wang , Jiayi Qian , Xiao Luo , Yingyan , Lin

We introduce NitroFusion, a fundamentally different approach to single-step diffusion that achieves high-quality generation through a dynamic adversarial framework. While one-step methods offer dramatic speed advantages, they typically…

Computer Vision and Pattern Recognition · Computer Science 2024-12-09 Dar-Yen Chen , Hmrishav Bandyopadhyay , Kai Zou , Yi-Zhe Song

Classifier-Free Guidance (CFG) is widely used to improve conditional fidelity in diffusion models, but its impact on sampling dynamics remains poorly understood. Prior studies, often restricted to unimodal conditional distributions or…

Machine Learning · Computer Science 2026-02-19 Cheng Jin , Qitan Shi , Yuantao Gu

Acquiring high-quality data for training discriminative models is a crucial yet challenging aspect of building effective predictive systems. In this paper, we present Diffusion Inversion, a simple yet effective method that leverages the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-25 Yongchao Zhou , Hshmat Sahak , Jimmy Ba

Diffusion models have achieved remarkable success in text-to-image synthesis, largely attributed to the use of classifier-free guidance (CFG), which enables high-quality, condition-aligned image generation. CFG combines the conditional…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Mingi Kwon , Shin seong Kim , Jaeseok Jeong. Yi Ting Hsiao , Youngjung Uh

In this paper, we present \textbf{\textit{FasterCache}}, a novel training-free strategy designed to accelerate the inference of video diffusion models with high-quality generation. By analyzing existing cache-based methods, we observe that…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Zhengyao Lv , Chenyang Si , Junhao Song , Zhenyu Yang , Yu Qiao , Ziwei Liu , Kwan-Yee K. Wong

Recent studies have demonstrated that diffusion models are capable of generating high-quality samples, but their quality heavily depends on sampling guidance techniques, such as classifier guidance (CG) and classifier-free guidance (CFG).…

Computer Vision and Pattern Recognition · Computer Science 2025-07-08 Donghoon Ahn , Hyoungwon Cho , Jaewon Min , Wooseok Jang , Jungwoo Kim , SeonHwa Kim , Hyun Hee Park , Kyong Hwan Jin , Seungryong Kim

This study presents a generative optimization framework that builds on a fine-tuned diffusion model and reward-directed sampling to generate high-performance engineering designs. The framework adopts a parametric representation of the…

Machine Learning · Computer Science 2025-08-05 Hadi Keramati , Patrick Kirchen , Mohammed Hannan , Rajeev K. Jaiman

Classifier guidance -- using the gradients of an image classifier to steer the generations of a diffusion model -- has the potential to dramatically expand the creative control over image generation and editing. However, currently…

Computer Vision and Pattern Recognition · Computer Science 2023-06-02 Bram Wallace , Akash Gokul , Stefano Ermon , Nikhil Naik

Despite diffusion models' superior capabilities in modeling complex distributions, there are still non-trivial distributional discrepancies between generated and ground-truth images, which has resulted in several notable problems in image…

Computer Vision and Pattern Recognition · Computer Science 2024-10-08 Yujian Liu , Yang Zhang , Tommi Jaakkola , Shiyu Chang

Denoising diffusion probabilistic models (diffusion models for short) require a large number of iterations in inference to achieve the generation quality that matches or surpasses the state-of-the-art generative models, which invariably…

Audio and Speech Processing · Electrical Eng. & Systems 2022-02-10 Zehua Chen , Xu Tan , Ke Wang , Shifeng Pan , Danilo Mandic , Lei He , Sheng Zhao

Score-based diffusion models are a powerful class of generative models, but their practical use often depends on training neural networks to approximate the score function. Training-free diffusion models provide an attractive alternative by…

Numerical Analysis · Mathematics 2026-01-28 Pengjun Wang , Zezhong Zhang , Minglei Yang , Feng Bao , Yanzhao Cao , Guannan Zhang

Continuous Conditional Diffusion Model (CCDM) is a diffusion-based framework designed to generate high-quality images conditioned on continuous regression labels. Although CCDM has demonstrated clear advantages over prior approaches across…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Xin Ding , Yun Chen , Sen Zhang , Kao Zhang , Nenglun Chen , Peibei Cao , Yongwei Wang , Fei Wu