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Diffusion models (DMs) have demonstrated exceptional performance in text-to-image tasks, leading to their widespread use. With the introduction of classifier-free guidance (CFG), the quality of images generated by DMs is significantly…

计算机视觉与模式识别 · 计算机科学 2025-05-30 Jiadong Pan , Liang Li , Hongcheng Gao , Zheng-Jun Zha , Qingming Huang , Jiebo Luo

Classifier-Free Guidance (CFG) improves sample quality in diffusion models, but its dual-pass inference and reliance on null-condition training limit its use in few-step regimes. Attention-space guidance has emerged as a complementary…

机器学习 · 计算机科学 2026-05-19 Kwanyoung Kim

Classifier-free guidance (CFG) has become an essential component of modern diffusion models to enhance both generation quality and alignment with input conditions. However, CFG requires specific training procedures and is limited to…

图形学 · 计算机科学 2025-11-06 Javad Rajabi , Soroush Mehraban , Seyedmorteza Sadat , Babak Taati

While classifier-free guidance (CFG) is essential for conditional diffusion models, it doubles the number of neural function evaluations (NFEs) per inference step. To mitigate this inefficiency, we introduce adapter guidance distillation…

机器学习 · 计算机科学 2025-03-11 Cristian Perez Jensen , Seyedmorteza Sadat

The generation of high-quality, diverse, and prompt-aligned images is a central goal in image-generating diffusion models. The popular classifier-free guidance (CFG) approach improves quality and alignment at the cost of reduced variation,…

机器学习 · 计算机科学 2025-10-21 Enhao Gu , Haolin Hou

Diffusion models generate synthetic images through an iterative refinement process. However, the misalignment between the simulation-free objective and the iterative process often causes accumulated gradient error along the sampling…

计算机视觉与模式识别 · 计算机科学 2026-03-24 Liangyu Yuan , Yufei Huang , Mingkun Lei , Tong Zhao , Ruoyu Wang , Changxi Chi , Yiwei Wang , Chi Zhang

Counterfactual generation aims to simulate realistic hypothetical outcomes under causal interventions. Diffusion models have emerged as a powerful tool for this task, combining DDIM inversion with conditional generation and classifier-free…

计算机视觉与模式识别 · 计算机科学 2026-05-11 Tian Xia , Fabio De Sousa Ribeiro , Rajat R Rasal , Avinash Kori , Raghav Mehta , Ben Glocker

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…

计算机视觉与模式识别 · 计算机科学 2026-02-11 Prin Phunyaphibarn , Phillip Y. Lee , Jaihoon Kim , Minhyuk Sung

Classifier-Free Guidance (CFG) significantly enhances controllability in generative models by interpolating conditional and unconditional predictions. However, standard CFG often employs a static unconditional input, which can be suboptimal…

计算与语言 · 计算机科学 2025-05-27 Pengxiang Li , Shilin Yan , Joey Tsai , Renrui Zhang , Ruichuan An , Ziyu Guo , Xiaowei Gao

Training-free guided sampling in diffusion models leverages off-the-shelf pre-trained networks, such as an aesthetic evaluation model, to guide the generation process. Current training-free guided sampling algorithms obtain the guidance…

计算机视觉与模式识别 · 计算机科学 2023-12-20 Jiachun Pan , Hanshu Yan , Jun Hao Liew , Jiashi Feng , Vincent Y. F. Tan

Classifier-Free Guidance (CFG), which combines the conditional and unconditional score functions with two coefficients summing to one, serves as a practical technique for diffusion model sampling. Theoretically, however, denoising with CFG…

计算机视觉与模式识别 · 计算机科学 2025-10-02 Mengfei Xia , Nan Xue , Yujun Shen , Ran Yi , Tieliang Gong , Yong-Jin Liu

Classifier-Free Guidance (CFG) is a widely adopted technique in diffusion/flow models to improve image fidelity and controllability. In this work, we first analytically study the effect of CFG on flow matching models trained on Gaussian…

计算机视觉与模式识别 · 计算机科学 2025-04-04 Weichen Fan , Amber Yijia Zheng , Raymond A. Yeh , Ziwei Liu

Guidance in image generation steers models towards higher-quality or more targeted outputs, typically achieved in Diffusion Models (DMs) via Classifier-free Guidance (CFG). However, recent Consistency Models (CMs), which offer fewer…

计算机视觉与模式识别 · 计算机科学 2025-02-11 Chia-Hong Hsu , Shiu-hong Kao , Randall Balestriero

Classifier-Free Guidance (CFG) is a widely used mechanism for controlling diffusion-based generative models, yet its guidance scale is typically treated as a fixed hyperparameter throughout generation. This static design yields a suboptimal…

计算与语言 · 计算机科学 2026-05-11 Fan Zhou , Tim Van de Cruys

We show that diffusion models can achieve image sample quality superior to the current state-of-the-art generative models. We achieve this on unconditional image synthesis by finding a better architecture through a series of ablations. For…

机器学习 · 计算机科学 2021-06-02 Prafulla Dhariwal , Alex Nichol

Classifier-Free Guidance (CFG) has emerged as a central approach for enhancing semantic alignment in flow-based diffusion models. In this paper, we explore a unified framework called CFG-Ctrl, which reinterprets CFG as a control applied to…

计算机视觉与模式识别 · 计算机科学 2026-03-12 Hanyang Wang , Yiyang Liu , Jiawei Chi , Fangfu Liu , Ran Xue , Yueqi Duan

With the rapid development of text-to-vision generation diffusion models, classifier-free guidance has emerged as the most prevalent method for conditioning. However, this approach inherently requires twice as many steps for model…

计算机视觉与模式识别 · 计算机科学 2025-06-11 Huixuan Zhang , Junzhe Zhang , Xiaojun Wan

Denoising diffusion models (DDMs) have attracted attention for their exceptional generation quality and diversity. This success is largely attributed to the use of class- or text-conditional diffusion guidance methods, such as classifier…

计算机视觉与模式识别 · 计算机科学 2023-08-25 Susung Hong , Gyuseong Lee , Wooseok Jang , Seungryong Kim

The primary axes of interest in image-generating diffusion models are image quality, the amount of variation in the results, and how well the results align with a given condition, e.g., a class label or a text prompt. The popular…

计算机视觉与模式识别 · 计算机科学 2024-12-20 Tero Karras , Miika Aittala , Tuomas Kynkäänniemi , Jaakko Lehtinen , Timo Aila , Samuli Laine

We introduce a novel, training-free approach for enhancing alignment in Transformer-based Text-Guided Diffusion Models (TGDMs). Existing TGDMs often struggle to generate semantically aligned images, particularly when dealing with complex…

计算机视觉与模式识别 · 计算机科学 2025-03-25 Shulei Wang , Wang Lin , Hai Huang , Hanting Wang , Sihang Cai , WenKang Han , Tao Jin , Jingyuan Chen , Jiacheng Sun , Jieming Zhu , Zhou Zhao