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Classifier-Free Guidance (CFG) is a fundamental technique in training conditional diffusion models. The common practice for CFG-based training is to use a single network to learn both conditional and unconditional noise prediction, with a…

Computer Vision and Pattern Recognition · Computer Science 2026-02-11 Prin Phunyaphibarn , Phillip Y. Lee , Jaihoon Kim , Minhyuk Sung

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

Flow matching has demonstrated strong generative capabilities and has become a core component in modern Text-to-Speech (TTS) systems. To ensure high-quality speech synthesis, Classifier-Free Guidance (CFG) is widely used during the…

Audio and Speech Processing · Electrical Eng. & Systems 2025-05-05 Yuzhe Liang , Wenzhe Liu , Chunyu Qiang , Zhikang Niu , Yushen Chen , Ziyang Ma , Wenxi Chen , Nan Li , Chen Zhang , Xie Chen

Customizing diffusion models to generate identity-preserving images from user-provided reference images is an intriguing new problem. The prevalent approaches typically require training on extensive domain-specific images to achieve…

Computer Vision and Pattern Recognition · Computer Science 2024-12-11 Zhicheng Sun , Zhenhao Yang , Yang Jin , Haozhe Chi , Kun Xu , Kun Xu , Liwei Chen , Hao Jiang , Yang Song , Kun Gai , Yadong Mu

Classifier-free guidance (CFG) has helped diffusion models achieve great conditional generation in various fields. Recently, more diffusion guidance methods have emerged with improved generation quality and human preference. However, can…

Computer Vision and Pattern Recognition · Computer Science 2026-02-27 Dian Xie , Shitong Shao , Lichen Bai , Zikai Zhou , Bojun Cheng , Shuo Yang , Jun Wu , Zeke Xie

Classifier-free guidance (CFG) is a core technique powering state-of-the-art image generation systems, yet its underlying mechanisms remain poorly understood. In this work, we begin by analyzing CFG in a simplified linear diffusion model,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Xiang Li , Rongrong Wang , Qing Qu

Classifier-free guidance (CFG) succeeds in condition diffusion models that use a guidance scale to balance the influence of conditional and unconditional terms. A high guidance scale is used to enhance the performance of the conditional…

Computer Vision and Pattern Recognition · Computer Science 2025-06-27 Kaiyu Song , Hanjiang Lai

Guidance techniques are commonly used in diffusion and flow models to improve image quality and input consistency for conditional generative tasks such as class-conditional and text-to-image generation. In particular, classifier-free…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Tariq Berrada Ifriqi , Adriana Romero-Soriano , Michal Drozdzal , Jakob Verbeek , Karteek Alahari

This paper presents Model-guidance (MG), a novel objective for training diffusion model that addresses and removes of the commonly used Classifier-free guidance (CFG). Our innovative approach transcends the standard modeling of solely data…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Zhicong Tang , Jianmin Bao , Dong Chen , Baining Guo

Various weather modelling problems (e.g., weather forecasting, optimizing turbine placements, etc.) require ample access to high-resolution, highly accurate wind data. Acquiring such high-resolution wind data, however, remains a challenging…

Machine Learning · Computer Science 2025-12-17 Jacob Schnell , Aditya Makkar , Gunadi Gani , Aniket Srinivasan Ashok , Darren Lo , Mike Optis , Alexander Wong , Yuhao Chen

Classifier-Free Guidance (CFG) is a widely used technique for conditional generation and improving sample quality in continuous diffusion models, and its extensions to discrete diffusion has recently started to be investigated. In order to…

Machine Learning · Computer Science 2026-03-04 Kevin Rojas , Ye He , Chieh-Hsin Lai , Yuhta Takida , Yuki Mitsufuji , Molei Tao

Classifier free guidance is a standard method for conditional sampling in diffusion models, but its sampling rule is not aligned with the objective used in training. This mismatch induces a structural sampling error through the interaction…

Machine Learning · Computer Science 2026-05-27 Nakgyu Yang , Yechan Lee , SooJean Han

High-resolution image synthesis with diffusion models often suffers from energy instabilities and guidance artifacts that degrade visual quality. We analyze the latent energy landscape during sampling and propose adaptive classifier-free…

Graphics · Computer Science 2025-12-12 Ankit Sanjyal

Guided or controlled data generation with diffusion models\blfootnote{Partial preliminary results of this work appeared in International Conference on Machine Learning 2025 \citep{li2025provable}.} has become a cornerstone of modern…

Machine Learning · Statistics 2025-12-05 Yuchen Jiao , Yuxin Chen , Gen Li

As Classifier-Free Guidance (CFG) has proven effective in conditional diffusion model sampling for improved condition alignment, many applications use a negated CFG term to filter out unwanted features from samples. However, simply negating…

Machine Learning · Computer Science 2024-11-27 Jinho Chang , Hyungjin Chung , Jong Chul Ye

Classifier-free guidance (CFG) is a key technique for improving conditional generation in diffusion models, enabling more accurate control while enhancing sample quality. It is natural to extend this technique to video diffusion, which…

Machine Learning · Computer Science 2025-07-25 Kiwhan Song , Boyuan Chen , Max Simchowitz , Yilun Du , Russ Tedrake , Vincent Sitzmann

Autoregressive (AR) models have emerged as powerful tools for image generation by modeling images as sequences of discrete tokens. While Classifier-Free Guidance (CFG) has been adopted to improve conditional generation, its application in…

Computer Vision and Pattern Recognition · Computer Science 2025-10-03 Dongli Xu , Aleksei Tiulpin , Matthew B. Blaschko

Classifier-Free Guidance (CFG) has been a default technique in various visual generative models, yet it requires inference from both conditional and unconditional models during sampling. We propose to build visual models that are free from…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Huayu Chen , Kai Jiang , Kaiwen Zheng , Jianfei Chen , Hang Su , Jun Zhu

Classifier-free guidance (CFG) has emerged as a pivotal advancement in text-to-image latent diffusion models, establishing itself as a cornerstone technique for achieving high-quality image synthesis. However, under high guidance weights,…

Machine Learning · Computer Science 2025-06-26 Cheng Jin , Zhenyu Xiao , Chutao Liu , Yuantao Gu

Classifier-free guidance (CFG) is widely used in diffusion models but often introduces over-contrast and over-saturation artifacts at higher guidance strengths. We present EP-CFG (Energy-Preserving Classifier-Free Guidance), which addresses…

Computer Vision and Pattern Recognition · Computer Science 2024-12-16 Kai Zhang , Fujun Luan , Sai Bi , Jianming Zhang