Search Results for author: Zenghao Chai

Found 12 papers, 8 papers with code

Towards Effective Collaborative Learning in Long-Tailed Recognition

no code implementations5 May 2023 Zhengzhuo Xu, Zenghao Chai, Chengyin Xu, Chun Yuan, Haiqin Yang

In this paper, we observe that the knowledge transfer between experts is imbalanced in terms of class distribution, which results in limited performance improvement of the minority classes.

Transfer Learning

SEAM: Searching Transferable Mixed-Precision Quantization Policy through Large Margin Regularization

no code implementations14 Feb 2023 Chen Tang, Kai Ouyang, Zenghao Chai, Yunpeng Bai, Yuan Meng, Zhi Wang, Wenwu Zhu

This general and dataset-independent property makes us search for the MPQ policy over a rather small-scale proxy dataset and then the policy can be directly used to quantize the model trained on a large-scale dataset.

Quantization

ERA-Solver: Error-Robust Adams Solver for Fast Sampling of Diffusion Probabilistic Models

no code implementations30 Jan 2023 Shengmeng Li, Luping Liu, Zenghao Chai, Runnan Li, Xu Tan

Different from the traditional predictor based on explicit Adams methods, we leverage a Lagrange interpolation function as the predictor, which is further enhanced with an error-robust strategy to adaptively select the Lagrange bases with lower error in the estimated noise.

Denoising Image Generation

Learning Imbalanced Data with Vision Transformers

1 code implementation CVPR 2023 Zhengzhuo Xu, Ruikang Liu, Shuo Yang, Zenghao Chai, Chun Yuan

In this paper, we systematically investigate the ViTs' performance in LTR and propose LiVT to train ViTs from scratch only with LT data.

Long-tail Learning

HyP$^2$ Loss: Beyond Hypersphere Metric Space for Multi-label Image Retrieval

1 code implementation14 Aug 2022 Chengyin Xu, Zenghao Chai, Zhengzhuo Xu, Chun Yuan, Yanbo Fan, Jue Wang

Image retrieval has become an increasingly appealing technique with broad multimedia application prospects, where deep hashing serves as the dominant branch towards low storage and efficient retrieval.

Deep Hashing Metric Learning +1

REALY: Rethinking the Evaluation of 3D Face Reconstruction

1 code implementation18 Mar 2022 Zenghao Chai, Haoxian Zhang, Jing Ren, Di Kang, Zhengzhuo Xu, Xuefei Zhe, Chun Yuan, Linchao Bao

The evaluation of 3D face reconstruction results typically relies on a rigid shape alignment between the estimated 3D model and the ground-truth scan.

3D Face Reconstruction

Semantic-Sparse Colorization Network for Deep Exemplar-based Colorization

1 code implementation2 Dec 2021 Yunpeng Bai, Chao Dong, Zenghao Chai, Andong Wang, Zhengzhuo Xu, Chun Yuan

To address these two problems, we propose Semantic-Sparse Colorization Network (SSCN) to transfer both the global image style and detailed semantic-related colors to the gray-scale image in a coarse-to-fine manner.

Colorization

Towards Calibrated Model for Long-Tailed Visual Recognition from Prior Perspective

1 code implementation NeurIPS 2021 Zhengzhuo Xu, Zenghao Chai, Chun Yuan

Real-world data universally confronts a severe class-imbalance problem and exhibits a long-tailed distribution, i. e., most labels are associated with limited instances.

Data Augmentation Long-tail Learning

MoDeRNN: Towards Fine-grained Motion Details for Spatiotemporal Predictive Learning

1 code implementation25 Oct 2021 Zenghao Chai, Zhengzhuo Xu, Chun Yuan

We carefully design Detail Context Block (DCB) to extract fine-grained details and improve the isolated correlation between upper context state and current input state.

CMS-LSTM: Context Embedding and Multi-Scale Spatiotemporal Expression LSTM for Predictive Learning

1 code implementation6 Feb 2021 Zenghao Chai, Zhengzhuo Xu, Yunpeng Bai, Zhihui Lin, Chun Yuan

To tackle the increasing ambiguity during forecasting, we design CMS-LSTM to focus on context correlations and multi-scale spatiotemporal flow with details on fine-grained locals, containing two elaborate designed blocks: Context Embedding (CE) and Spatiotemporal Expression (SE) blocks.

Video Prediction

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