Search Results for author: Lu Xia

Found 10 papers, 1 papers with code

AdamL: A fast adaptive gradient method incorporating loss function

no code implementations23 Dec 2023 Lu Xia, Stefano Massei

Adaptive first-order optimizers are fundamental tools in deep learning, although they may suffer from poor generalization due to the nonuniform gradient scaling.

ReCLIP: Refine Contrastive Language Image Pre-Training with Source Free Domain Adaptation

1 code implementation4 Aug 2023 Xuefeng Hu, Ke Zhang, Lu Xia, Albert Chen, Jiajia Luo, Yuyin Sun, Ken Wang, Nan Qiao, Xiao Zeng, Min Sun, Cheng-Hao Kuo, Ram Nevatia

Large-scale Pre-Training Vision-Language Model such as CLIP has demonstrated outstanding performance in zero-shot classification, e. g. achieving 76. 3% top-1 accuracy on ImageNet without seeing any example, which leads to potential benefits to many tasks that have no labeled data.

Image Classification Language Modelling +2

On the Convergence of the Gradient Descent Method with Stochastic Fixed-point Rounding Errors under the Polyak-Lojasiewicz Inequality

no code implementations23 Jan 2023 Lu Xia, Michiel E. Hochstenbach, Stefano Massei

When training neural networks with low-precision computation, rounding errors often cause stagnation or are detrimental to the convergence of the optimizers; in this paper we study the influence of rounding errors on the convergence of the gradient descent method for problems satisfying the Polyak-Lojasiewicz inequality.

CameraPose: Weakly-Supervised Monocular 3D Human Pose Estimation by Leveraging In-the-wild 2D Annotations

no code implementations8 Jan 2023 Cheng-Yen Yang, Jiajia Luo, Lu Xia, Yuyin Sun, Nan Qiao, Ke Zhang, Zhongyu Jiang, Jenq-Neng Hwang

By adding a camera parameter branch, any in-the-wild 2D annotations can be fed into our pipeline to boost the training diversity and the 3D poses can be implicitly learned by reprojecting back to 2D.

Data Augmentation Monocular 3D Human Pose Estimation

On the influence of stochastic roundoff errors and their bias on the convergence of the gradient descent method with low-precision floating-point computation

no code implementations24 Feb 2022 Lu Xia, Stefano Massei, Michiel E. Hochstenbach, Barry Koren

When implementing the gradient descent method in low precision, the employment of stochastic rounding schemes helps to prevent stagnation of convergence caused by the vanishing gradient effect.

A Simple and Efficient Stochastic Rounding Method for Training Neural Networks in Low Precision

no code implementations24 Mar 2021 Lu Xia, Martijn Anthonissen, Michiel Hochstenbach, Barry Koren

Conventional stochastic rounding (CSR) is widely employed in the training of neural networks (NNs), showing promising training results even in low-precision computations.

Improved stochastic rounding

no code implementations31 May 2020 Lu Xia, Martijn Anthonissen, Michiel Hochstenbach, Barry Koren

When a sequence of computations is implemented, round-off errors may be magnified or accumulated.

Early Recognition of Human Activities from First-Person Videos Using Onset Representations

no code implementations20 Jun 2014 M. S. Ryoo, Thomas J. Fuchs, Lu Xia, J. K. Aggarwal, Larry Matthies

In this paper, we propose a methodology for early recognition of human activities from videos taken with a first-person viewpoint.

Activity Prediction Person Recognition +2

Spatio-temporal Depth Cuboid Similarity Feature for Activity Recognition Using Depth Camera

no code implementations CVPR 2013 Lu Xia, J. K. Aggarwal

Local spatio-temporal interest points (STIPs) and the resulting features from RGB videos have been proven successful at activity recognition that can handle cluttered backgrounds and partial occlusions.

Activity Recognition

Cannot find the paper you are looking for? You can Submit a new open access paper.