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The application of diffusion models in 3D LiDAR scene completion is limited due to diffusion's slow sampling speed. Score distillation accelerates diffusion sampling but with performance degradation, while post-training with direct policy…

Computer Vision and Pattern Recognition · Computer Science 2025-04-17 An Zhao , Shengyuan Zhang , Ling Yang , Zejian Li , Jiale Wu , Haoran Xu , AnYang Wei , Perry Pengyun GU , Lingyun Sun

Large language models are increasingly post-trained with reinforcement learning in verifiable domains such as code and math. Yet, current methods for reinforcement learning with verifiable rewards (RLVR) learn only from a scalar outcome…

Distillation addresses the slow sampling problem in diffusion models by creating models with smaller size or fewer steps that approximate the behavior of high-step teachers. In this work, we propose a reinforcement learning based…

Machine Learning · Computer Science 2025-12-30 Amirhossein Tighkhorshid , Zahra Dehghanian , Gholamali Aminian , Chengchun Shi , Hamid R. Rabiee

Direct Preference Optimization (DPO) is a powerful paradigm to align language models with human preferences using pairwise comparisons. However, its binary win-or-loss supervision often proves insufficient for training small models with…

Computation and Language · Computer Science 2025-09-23 Minchan Kwon , Junwon Ko , Kangil Kim , Junmo Kim

Previous Knowledge Distillation based efficient image retrieval methods employs a lightweight network as the student model for fast inference. However, the lightweight student model lacks adequate representation capacity for effective…

Computer Vision and Pattern Recognition · Computer Science 2023-10-06 Yi Xie , Huaidong Zhang , Xuemiao Xu , Jianqing Zhu , Shengfeng He

Currently, one of the major challenges in deep learning-based video frame interpolation (VFI) is the large model sizes and high computational complexity associated with many high performance VFI approaches. In this paper, we present a…

Image and Video Processing · Electrical Eng. & Systems 2023-02-24 Crispian Morris , Duolikun Danier , Fan Zhang , Nantheera Anantrasirichai , David R. Bull

Diffusion distillation models effectively accelerate reverse sampling by compressing the process into fewer steps. However, these models still exhibit a performance gap compared to their pre-trained diffusion model counterparts, exacerbated…

Computer Vision and Pattern Recognition · Computer Science 2024-12-13 Geon Yeong Park , Sang Wan Lee , Jong Chul Ye

Large language models (LLMs) have demonstrated exceptional performance across various applications, but their conversational abilities decline sharply as model size decreases, presenting a barrier to their deployment in resource-constrained…

Machine Learning · Computer Science 2025-06-23 Zhengze Zhang , Shiqi Wang , Yiqun Shen , Simin Guo , Dahua Lin , Xiaoliang Wang , Nguyen Cam-Tu , Fei Tan

Vision-based deep reinforcement learning (RL) typically obtains performance benefit by using high capacity and relatively large convolutional neural networks (CNN). However, a large network leads to higher inference costs (power, latency,…

Machine Learning · Computer Science 2019-05-01 Sam Green , Craig M. Vineyard , Çetin Kaya Koç

Large language models trained with reinforcement learning (RL) for mathematical reasoning face a fundamental challenge: on problems the model cannot solve at all - "cliff" prompts - the RL gradient vanishes entirely, preventing any learning…

Machine Learning · Computer Science 2026-03-26 Ken Ding

Video diffusion models (VDMs) have demonstrated remarkable capabilities in text-to-video (T2V) generation. Despite their success, VDMs still suffer from degraded image quality and flickering artifacts. To address these issues, some…

Computer Vision and Pattern Recognition · Computer Science 2026-01-01 Jiacheng Zhang , Jie Wu , Weifeng Chen , Yatai Ji , Xuefeng Xiao , Weilin Huang , Kai Han

Benefiting from masked visual modeling, self-supervised video representation learning has achieved remarkable progress. However, existing methods focus on learning representations from scratch through reconstructing low-level features like…

Computer Vision and Pattern Recognition · Computer Science 2023-03-08 Rui Wang , Dongdong Chen , Zuxuan Wu , Yinpeng Chen , Xiyang Dai , Mengchen Liu , Lu Yuan , Yu-Gang Jiang

Dataset distillation aims to learn a small synthetic dataset that preserves most of the information from the original dataset. Dataset distillation can be formulated as a bi-level meta-learning problem where the outer loop optimizes the…

Machine Learning · Computer Science 2022-10-25 Yongchao Zhou , Ehsan Nezhadarya , Jimmy Ba

Efficient deep learning-based approaches have achieved remarkable performance in single image super-resolution. However, recent studies on efficient super-resolution have mainly focused on reducing the number of parameters and…

Computer Vision and Pattern Recognition · Computer Science 2023-04-17 Lei Yu , Xinpeng Li , Youwei Li , Ting Jiang , Qi Wu , Haoqiang Fan , Shuaicheng Liu

Reinforcement learning has emerged as a principled post-training paradigm for Temporal Video Grounding (TVG) due to its on-policy optimization, yet existing GRPO-based methods remain fundamentally constrained by sparse reward signals and…

Computer Vision and Pattern Recognition · Computer Science 2026-05-15 Jiaze Li , Hao Yin , Haoran Xu , Boshen Xu , Wenhui Tan , Zewen He , Jianzhong Ju , Zhenbo Luo , Jian Luan

Recent studies have identified Direct Preference Optimization (DPO) as an efficient and reward-free approach to improving video generation quality. However, existing methods largely follow image-domain paradigms and are mainly developed on…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Jie Du , Xinyu Gong , Qingshan Tan , Wen Li , Yangming Cheng , Weitao Wang , Chenlu Zhan , Suhui Wu , Hao Zhang , Jun Zhang

Video style transfer techniques inspire many exciting applications on mobile devices. However, their efficiency and stability are still far from satisfactory. To boost the transfer stability across frames, optical flow is widely adopted,…

Computer Vision and Pattern Recognition · Computer Science 2021-07-09 Xinghao Chen , Yiman Zhang , Yunhe Wang , Han Shu , Chunjing Xu , Chang Xu

High-quality computer vision models typically address the problem of understanding the general distribution of real-world images. However, most cameras observe only a very small fraction of this distribution. This offers the possibility of…

Computer Vision and Pattern Recognition · Computer Science 2020-01-29 Ravi Teja Mullapudi , Steven Chen , Keyi Zhang , Deva Ramanan , Kayvon Fatahalian

In recent years, numerous real-time stereo matching methods have been introduced, but they often lack accuracy. These methods attempt to improve accuracy by introducing new modules or integrating traditional methods. However, the…

Computer Vision and Pattern Recognition · Computer Science 2024-05-22 Baiyu Pan , Jichao Jiao , Jianxing Pang , Jun Cheng

We introduce Proximal Policy Distillation (PPD), a novel policy distillation method that integrates student-driven distillation and Proximal Policy Optimization (PPO) to increase sample efficiency and to leverage the additional rewards that…

Machine Learning · Computer Science 2026-05-11 Giacomo Spigler
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