Search Results for author: Qifei Wang

Found 14 papers, 2 papers with code

PRDP: Proximal Reward Difference Prediction for Large-Scale Reward Finetuning of Diffusion Models

no code implementations13 Feb 2024 Fei Deng, Qifei Wang, Wei Wei, Matthias Grundmann, Tingbo Hou

However, in the vision domain, existing RL-based reward finetuning methods are limited by their instability in large-scale training, rendering them incapable of generalizing to complex, unseen prompts.

Denoising Reinforcement Learning (RL)

Parrot: Pareto-optimal Multi-Reward Reinforcement Learning Framework for Text-to-Image Generation

no code implementations11 Jan 2024 Seung Hyun Lee, Yinxiao Li, Junjie Ke, Innfarn Yoo, Han Zhang, Jiahui Yu, Qifei Wang, Fei Deng, Glenn Entis, Junfeng He, Gang Li, Sangpil Kim, Irfan Essa, Feng Yang

Additionally, Parrot employs a joint optimization approach for the T2I model and the prompt expansion network, facilitating the generation of quality-aware text prompts, thus further enhancing the final image quality.

Reinforcement Learning (RL) Text-to-Image Generation

On-device Real-time Custom Hand Gesture Recognition

no code implementations19 Sep 2023 Esha Uboweja, David Tian, Qifei Wang, Yi-Chun Kuo, Joe Zou, Lu Wang, George Sung, Matthias Grundmann

Our framework provides a pre-trained single-hand embedding model that can be fine-tuned for custom gesture recognition.

Hand Gesture Recognition Hand-Gesture Recognition

Forward-Forward Training of an Optical Neural Network

no code implementations30 May 2023 Ilker Oguz, Junjie Ke, Qifei Wang, Feng Yang, Mustafa Yıldırım, Niyazi Ulas Dinc, Jih-Liang Hsieh, Christophe Moser, Demetri Psaltis

Neural networks (NN) have demonstrated remarkable capabilities in various tasks, but their computation-intensive nature demands faster and more energy-efficient hardware implementations.

Multi-path Neural Networks for On-device Multi-domain Visual Classification

no code implementations10 Oct 2020 Qifei Wang, Junjie Ke, Joshua Greaves, Grace Chu, Gabriel Bender, Luciano Sbaiz, Alec Go, Andrew Howard, Feng Yang, Ming-Hsuan Yang, Jeff Gilbert, Peyman Milanfar

This approach effectively reduces the total number of parameters and FLOPS, encouraging positive knowledge transfer while mitigating negative interference across domains.

General Classification Neural Architecture Search +1

Learnable Cost Volume Using the Cayley Representation

1 code implementation ECCV 2020 Taihong Xiao, Jinwei Yuan, Deqing Sun, Qifei Wang, Xin-Yu Zhang, Kehan Xu, Ming-Hsuan Yang

Cost volume is an essential component of recent deep models for optical flow estimation and is usually constructed by calculating the inner product between two feature vectors.

Optical Flow Estimation

A Survey of Visual Analysis of Human Motion and Its Applications

no code implementations2 Aug 2016 Qifei Wang

This paper summarizes the recent progress in human motion analysis and its applications.

Action Recognition Temporal Action Localization

Remote Health Coaching System and Human Motion Data Analysis for Physical Therapy with Microsoft Kinect

no code implementations21 Dec 2015 Qifei Wang, Gregorij Kurillo, Ferda Ofli, Ruzena Bajcsy

In order to generate the kinematic parameter from the noisy data captured by Kinect, we propose a kinematic filtering algorithm based on Unscented Kalman Filter and the kinematic model of human skeleton.

Unsupervised Temporal Segmentation of Repetitive Human Actions Based on Kinematic Modeling and Frequency Analysis

no code implementations13 Dec 2015 Qifei Wang, Gregorij Kurillo, Ferda Ofli, Ruzena Bajcsy

In this paper, we propose a method for temporal segmentation of human repetitive actions based on frequency analysis of kinematic parameters, zero-velocity crossing detection, and adaptive k-means clustering.

Clustering Segmentation

Evaluation of Pose Tracking Accuracy in the First and Second Generations of Microsoft Kinect

no code implementations13 Dec 2015 Qifei Wang, Gregorij Kurillo, Ferda Ofli, Ruzena Bajcsy

Microsoft Kinect camera and its skeletal tracking capabilities have been embraced by many researchers and commercial developers in various applications of real-time human movement analysis.

Pose Tracking

Computational Models for Multiview Dense Depth Maps of Dynamic Scene

no code implementations8 Dec 2015 Qifei Wang

This paper reviews the recent progresses of the depth map generation for dynamic scene and its corresponding computational models.

Content adaptive screen image scaling

no code implementations21 Oct 2015 Yao Zhai, Qifei Wang, Yan Lu, Shipeng Li

This paper proposes an efficient content adaptive screen image scaling scheme for the real-time screen applications like remote desktop and screen sharing.

General Classification

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