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Diffusion models have achieved state-of-the-art image generation. However, the random Gaussian noise used to start the diffusion process influences the final output, causing variations in image quality and prompt adherence. Existing…

计算机视觉与模式识别 · 计算机科学 2025-09-18 Harvey Mannering , Zhiwu Huang , Adam Prugel-Bennett

Model-free reinforcement learning has emerged as a powerful method for developing robust robot control policies capable of navigating through complex and unstructured terrains. The effectiveness of these methods hinges on two essential…

机器人学 · 计算机科学 2024-10-15 Youwei Yu , Junhong Xu , Lantao Liu

Text-to-image diffusion models have achieved state-of-the-art results in synthesis tasks; however, there is a growing concern about their potential misuse in creating harmful content. To mitigate these risks, post-hoc model intervention…

计算机视觉与模式识别 · 计算机科学 2025-03-20 Feifei Li , Mi Zhang , Yiming Sun , Min Yang

Diffusion models excel in generating high-quality images. However, current diffusion models struggle to produce reliable images without guidance methods, such as classifier-free guidance (CFG). Are guidance methods truly necessary?…

计算机视觉与模式识别 · 计算机科学 2024-12-06 Donghoon Ahn , Jiwon Kang , Sanghyun Lee , Jaewon Min , Minjae Kim , Wooseok Jang , Hyoungwon Cho , Sayak Paul , SeonHwa Kim , Eunju Cha , Kyong Hwan Jin , Seungryong Kim

Proper guidance strategies are essential to achieve high-quality generation results without retraining diffusion and flow-based text-to-image models. Existing guidance either requires specific training or strong inductive biases of…

计算机视觉与模式识别 · 计算机科学 2025-09-29 Tiancheng Li , Weijian Luo , Zhiyang Chen , Liyuan Ma , Guo-Jun Qi

Diffusion models have achieved remarkable success as generative models. However, even a well-trained model can accumulate errors throughout the generation process. These errors become particularly problematic when arbitrary guidance is…

机器学习 · 计算机科学 2025-10-14 Youngrok Park , Hojung Jung , Sangmin Bae , Se-Young Yun

Despite their generative power, diffusion models struggle to maintain style consistency across images conditioned on the same style prompt, hindering their practical deployment in creative workflows. While several training-free methods…

计算机视觉与模式识别 · 计算机科学 2025-09-23 Jiexuan Zhang , Yiheng Du , Qian Wang , Weiqi Li , Yu Gu , Jian Zhang

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…

机器学习 · 计算机科学 2026-04-13 Chia-Hong Hsu , Randall Balestriero

Diffusion models have emerged as a powerful tool for generating high-quality images, videos, and 3D content. While sampling guidance techniques like CFG improve quality, they reduce diversity and motion. Autoguidance mitigates these issues…

计算机视觉与模式识别 · 计算机科学 2024-12-02 Junha Hyung , Kinam Kim , Susung Hong , Min-Jung Kim , Jaegul Choo

Generating stylistic text with specific attributes is a key problem in controllable text generation. Recently, diffusion models have emerged as a powerful paradigm for both visual and textual generation. Existing approaches can be broadly…

计算与语言 · 计算机科学 2025-10-09 Fan Zhou , Chang Tian , Tim Van de Cruys

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…

机器学习 · 统计学 2025-12-05 Yuchen Jiao , Yuxin Chen , Gen Li

Classifier-Free Guidance (CFG) has recently emerged in text-to-image generation as a lightweight technique to encourage prompt-adherence in generations. In this work, we demonstrate that CFG can be used broadly as an inference-time…

Diffusion models are a powerful class of generative models capable of producing high-quality images from pure noise using a simple text prompt. While most methods which introduce additional spatial constraints into the generated images…

计算机视觉与模式识别 · 计算机科学 2024-09-18 Zakaria Patel , Kirill Serkh

Despite the ability of existing large-scale text-to-image (T2I) models to generate high-quality images from detailed textual descriptions, they often lack the ability to precisely edit the generated or real images. In this paper, we propose…

计算机视觉与模式识别 · 计算机科学 2023-11-21 Chong Mou , Xintao Wang , Jiechong Song , Ying Shan , Jian Zhang

Classifier-free guidance (CFG) is the primary control over how strongly text semantics move a flow-based sampler, yet standard practice holds its scale fixed across the entire ODE trajectory. This is a fundamental mismatch: early steps are…

计算机视觉与模式识别 · 计算机科学 2026-05-18 Yan Luo , Ahmadou Aidara , Jingyi Lu , Jeremy Moebel , Kai Han , Mengyu Wang

Text-to-image diffusion models have achieved remarkable performance in image synthesis, while the text interface does not always provide fine-grained control over certain image factors. For instance, changing a single token in the text can…

计算机视觉与模式识别 · 计算机科学 2024-02-22 Chen Wu , Fernando De la Torre

Camouflage Images Generation (CIG) is an emerging research area that focuses on synthesizing images in which objects are harmoniously blended and exhibit high visual consistency with their surroundings. Existing methods perform CIG by…

计算机视觉与模式识别 · 计算机科学 2025-11-26 Yuhang Qian , Haiyan Chen , Wentong Li , Ningzhong Liu , Jie Qin

Training-free diffusion guidance offers a flexible framework for leveraging off-the-shelf classifiers without additional training. Yet, current approaches hinge on posterior approximations via Tweedie's formula, which often yield unreliable…

机器学习 · 计算机科学 2026-05-19 Van Khoa Nguyen , Lionel Blondé , Alexandros Kalousis

Diffusion models have shown great promise in synthesizing visually appealing images. However, it remains challenging to condition the synthesis at a fine-grained level, for instance, synthesizing image pixels following some generic color…

计算机视觉与模式识别 · 计算机科学 2025-03-11 Ka Chun Shum , Binh-Son Hua , Duc Thanh Nguyen , Sai-Kit Yeung

Artifact-free super-resolution (SR) aims to translate low-resolution images into their high-resolution counterparts with a strict integrity of the original content, eliminating any distortions or synthetic details. While traditional…

图像与视频处理 · 电气工程与系统科学 2024-03-26 Qingping Zheng , Ling Zheng , Yuanfan Guo , Ying Li , Songcen Xu , Jiankang Deng , Hang Xu