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We introduce Causal Computational Asymmetry (CCA), a principle for causal direction identification based on optimization dynamics in which one neural network is trained to predict $Y$ from $X$ and another to predict $X$ from $Y$, and the…

Machine Learning · Computer Science 2026-02-27 Abdulrahman Tamim

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…

Graphics · Computer Science 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…

Machine Learning · Computer Science 2025-03-11 Cristian Perez Jensen , Seyedmorteza Sadat

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

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…

Computation and Language · Computer Science 2026-05-11 Fan Zhou , Tim Van de Cruys

Diffusion models have achieved remarkable progress in class-to-image generation. However, we observe that despite impressive FID scores, state-of-the-art models often generate distorted or low-quality images, especially in certain classes.…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Jie Shao , Ke Zhu , Minghao Fu , Guo-hua Wang , Jianxin Wu

In diffusion and flow-matching generative models, guidance techniques are widely used to improve sample quality and consistency. Classifier-free guidance (CFG) is the de facto choice in modern systems and achieves this by contrasting…

Computer Vision and Pattern Recognition · Computer Science 2025-12-22 Ankit Yadav , Ta Duc Huy , Lingqiao Liu

Current sampling mechanisms for conditional diffusion models rely mainly on Classifier Free Guidance (CFG) to generate high-quality images. However, CFG requires several denoising passes in each time step, e.g., up to three passes in image…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Mehdi Noroozi , Alberto Gil Ramos , Luca Morreale , Ruchika Chavhan , Malcolm Chadwick , Abhinav Mehrotra , Sourav Bhattacharya

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…

Computer Vision and Pattern Recognition · Computer Science 2025-02-11 Chia-Hong Hsu , Shiu-hong Kao , Randall Balestriero

Autoregressive image and video generators are trained with teacher-forced histories but must sample from their own generated prefixes at inference time, making them vulnerable to exposure bias and prefix drift. Existing remedies either…

Computer Vision and Pattern Recognition · Computer Science 2026-05-29 Xinyao Liao , Qiyuan He , Yicong Li , Jiayin Zhu , Xiaoye Qu , Wei Wei , Angela Yao

Classifier guidance is a recently introduced method to trade off mode coverage and sample fidelity in conditional diffusion models post training, in the same spirit as low temperature sampling or truncation in other types of generative…

Machine Learning · Computer Science 2022-07-27 Jonathan Ho , Tim Salimans

Autoregressive (AR) models based on next-scale prediction are rapidly emerging as a powerful tool for image generation, but they face a critical weakness: information inconsistencies between patches across timesteps introduced by…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Ky Dan Nguyen , Hoang Lam Tran , Anh-Dung Dinh , Daochang Liu , Weidong Cai , Xiuying Wang , Chang Xu

Diffusion models have achieved remarkable success in synthesizing complex static and temporal visuals, a breakthrough largely driven by Classifier-Free Guidance (CFG). However, despite its pivotal role in aligning generated content with…

Computer Vision and Pattern Recognition · Computer Science 2026-04-30 Haosen Li , Wenshuo Chen , Lei Wang , Shaofeng Liang , Bowen Tian , Soning Lai , Yutao Yue

Diffusion models achieve strong performance in generative modeling, but their success often relies heavily on classifier-free guidance (CFG), an inference-time heuristic that modifies the sampling trajectory. In theory, diffusion models…

Machine Learning · Computer Science 2026-05-14 Xiang Li , Yixuan Jia , Xiao Li , Jeffrey A. Fessler , Rongrong Wang , Qing Qu

Conformal prediction (CP) and its extension, conformal risk control (CRC), are established frameworks for quantifying uncertainty in supervised machine learning through formal guarantees. However, recent breakthroughs in artificial…

Machine Learning · Computer Science 2026-05-29 Gabriel Loaiza-Ganem , Kevin Zhang , Wei Cui , Marc T. Law , Kin Kwan Leung

Flow-based generative models have become a strong framework for high-quality generative modeling, yet pretrained models are rarely used in their vanilla conditional form: conditional samples without guidance often appear diffuse and lack…

Machine Learning · Computer Science 2026-02-25 Runlong Liao , Jian Yu , Baiyu Su , Chi Zhang , Lizhang Chen , Qiang Liu

Classifier-free Guidance (CFG) lets practitioners trade-off fidelity against diversity in Diffusion Models (DMs). The practicality of CFG is however hindered by DMs sampling cost. On the other hand, Consistency Models (CMs) generate images…

Machine Learning · Computer Science 2026-04-13 Chia-Hong Hsu , Randall Balestriero

Diffusion-based editing models have emerged as a powerful tool for semantic image and video manipulation. However, existing models lack a mechanism for smoothly controlling the intensity of text-guided edits. In standard text-conditioned…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Alon Wolf , Chen Katzir , Kfir Aberman , Or Patashnik

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…

Machine Learning · Computer Science 2026-05-19 Kwanyoung Kim

Classifier-Free Guidance (CFG) serves as the de facto control mechanism for conditional diffusion, yet high guidance scales notoriously induce oversaturation, texture artifacts, and structural collapse. We attribute this failure to a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-13 Zexi Jia , Pengcheng Luo , Zhengyao Fang , Jinchao Zhang , Jie Zhou