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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…

机器学习 · 计算机科学 2026-03-04 Kevin Rojas , Ye He , Chieh-Hsin Lai , Yuhta Takida , Yuki Mitsufuji , Molei Tao

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…

计算机视觉与模式识别 · 计算机科学 2025-06-27 Kaiyu Song , Hanjiang Lai

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…

机器学习 · 计算机科学 2026-02-19 Cheng Jin , Qitan Shi , Yuantao Gu

Classifier-Free Guidance (CFG) is a widely adopted technique in diffusion and flow-based generative models, enabling high-quality conditional generation. A key theoretical challenge is characterizing the distribution induced by CFG,…

机器学习 · 计算机科学 2025-05-23 Krunoslav Lehman Pavasovic , Jakob Verbeek , Giulio Biroli , Marc Mezard

Classifier-Free Guidance (CFG) is a widely used technique for improving conditional diffusion models by linearly combining the outputs of conditional and unconditional denoisers. While CFG enhances visual quality and improves alignment with…

机器学习 · 计算机科学 2025-05-28 Badr Moufad , Yazid Janati , Alain Durmus , Ahmed Ghorbel , Eric Moulines , Jimmy Olsson

Classifier-free guidance (CFG) is a widely used technique for improving the perceptual quality of samples from conditional diffusion models. It operates by linearly combining conditional and unconditional score estimates using a guidance…

While Classifier-Free Guidance (CFG) has become standard for improving sample fidelity in conditional diffusion models, it can harm diversity and induce memorization by applying constant guidance regardless of whether a particular sample…

计算机视觉与模式识别 · 计算机科学 2025-10-10 Felix Koulischer , Florian Handke , Johannes Deleu , Thomas Demeester , Luca Ambrogioni

Classifier-free guidance (CFG) is crucial for improving both generation quality and alignment between the input condition and final output in diffusion models. While a high guidance scale is generally required to enhance these aspects, it…

机器学习 · 计算机科学 2025-06-04 Seyedmorteza Sadat , Otmar Hilliges , Romann M. Weber

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,…

机器学习 · 计算机科学 2025-06-26 Cheng Jin , Zhenyu Xiao , Chutao Liu , Yuantao Gu

Classifier-Free Guidance (CFG) is an essential component of text-to-image diffusion models, and understanding and advancing its operational mechanisms remains a central focus of research. Existing approaches stem from divergent theoretical…

计算机视觉与模式识别 · 计算机科学 2025-10-27 Kaibo Wang , Jianda Mao , Tong Wu , Yang Xiang

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,…

计算机视觉与模式识别 · 计算机科学 2025-11-12 Xiang Li , Rongrong Wang , Qing Qu

Classifier-Free Guidance (CFG) is a widely used inference-time technique to boost the image quality of diffusion models. Yet, its reliance on text conditions prevents its use in unconditional generation. We propose a simple method to enable…

计算机视觉与模式识别 · 计算机科学 2026-04-10 Weijia Zhang , Yuehao Liu , Shanyan Guan , Wu Ran , Yanhao Ge , Wei Li , Chao Ma

Image generation using diffusion models have demonstrated outstanding learning capabilities, effectively capturing the full distribution of the training dataset. They are known to generate wide variations in sampled images, albeit with a…

计算机视觉与模式识别 · 计算机科学 2024-11-26 Rahul Shenoy , Zhihong Pan , Kaushik Balakrishnan , Qisen Cheng , Yongmoon Jeon , Heejune Yang , Jaewon Kim

Classifier-free guidance (CFG) is an essential mechanism in contemporary text-driven diffusion models. In practice, in controlling the impact of guidance we can see the trade-off between the quality of the generated images and…

计算机视觉与模式识别 · 计算机科学 2025-02-18 Dawid Malarz , Artur Kasymov , Maciej Zięba , Jacek Tabor , Przemysław Spurek

Denoising diffusion models excel at generating high-quality images conditioned on text prompts, yet their effectiveness heavily relies on careful guidance during the sampling process. Classifier-Free Guidance (CFG) provides a widely used…

图形学 · 计算机科学 2026-03-04 Shai Yehezkel , Omer Dahary , Andrey Voynov , Daniel Cohen-Or

Classifier-free guidance (CFG) is the de facto standard for conditional sampling in diffusion models, yet it often reduces sample diversity. Using tools from statistical physics, we analyze the emergence of generative distortions induced by…

机器学习 · 统计学 2026-05-11 Enrico Ventura , Beatrice Achilli , Luca Ambrogioni , Carlo Lucibello

Classifier-free guidance (CFG) is a cornerstone of text-to-image diffusion models, yet its effectiveness is limited by the use of static guidance scales. This "one-size-fits-all" approach fails to adapt to the diverse requirements of…

Classifier-Free Guidance (CFG) is a cornerstone of modern text-to-image models, yet its reliance on a semantically vacuous null prompt ($\varnothing$) generates a guidance signal prone to geometric entanglement. This is a key factor…

计算机视觉与模式识别 · 计算机科学 2026-03-12 Shilong Han , Yuming Zhang , Hongxia Wang

Classifier-free guidance (CFG) is a fundamental tool in modern diffusion models for text-guided generation. Although effective, CFG has notable drawbacks. For instance, DDIM with CFG lacks invertibility, complicating image editing;…

计算机视觉与模式识别 · 计算机科学 2024-09-13 Hyungjin Chung , Jeongsol Kim , Geon Yeong Park , Hyelin Nam , Jong Chul Ye

Diffusion models often exhibit inconsistent sample quality due to stochastic variations inherent in their sampling trajectories. Although training-based fine-tuning (e.g. DDPO [1]) and inference-time alignment techniques[2] aim to improve…

计算机视觉与模式识别 · 计算机科学 2025-05-30 Sixian Wang , Zhiwei Tang , Tsung-Hui Chang
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