Search Results for author: Chengjian Feng

Found 8 papers, 6 papers with code

UniMD: Towards Unifying Moment Retrieval and Temporal Action Detection

1 code implementation7 Apr 2024 Yingsen Zeng, Yujie Zhong, Chengjian Feng, Lin Ma

Temporal Action Detection (TAD) focuses on detecting pre-defined actions, while Moment Retrieval (MR) aims to identify the events described by open-ended natural language within untrimmed videos.

Action Detection Moment Queries +4

InstaGen: Enhancing Object Detection by Training on Synthetic Dataset

no code implementations8 Feb 2024 Chengjian Feng, Yujie Zhong, Zequn Jie, Weidi Xie, Lin Ma

The grounding head is trained to align the text embedding of category names with the regional visual feature of the diffusion model, using supervision from an off-the-shelf object detector, and a novel self-training scheme on (novel) categories not covered by the detector.

Object object-detection +1

AeDet: Azimuth-invariant Multi-view 3D Object Detection

1 code implementation CVPR 2023 Chengjian Feng, Zequn Jie, Yujie Zhong, Xiangxiang Chu, Lin Ma

However, the typical convolution ignores the radial symmetry of the BEV features and increases the difficulty of the detector optimization.

3D Object Detection Depth Estimation +3

PromptDet: Towards Open-vocabulary Detection using Uncurated Images

2 code implementations30 Mar 2022 Chengjian Feng, Yujie Zhong, Zequn Jie, Xiangxiang Chu, Haibing Ren, Xiaolin Wei, Weidi Xie, Lin Ma

The goal of this work is to establish a scalable pipeline for expanding an object detector towards novel/unseen categories, using zero manual annotations.

Language Modelling Object

Exploring Classification Equilibrium in Long-Tailed Object Detection

1 code implementation ICCV 2021 Chengjian Feng, Yujie Zhong, Weilin Huang

Specifically, EBL increases the intensity of the adjustment of the decision boundary for the weak classes by a designed score-guided loss margin between any two classes.

Classification imbalanced classification +5

TOOD: Task-aligned One-stage Object Detection

5 code implementations ICCV 2021 Chengjian Feng, Yujie Zhong, Yu Gao, Matthew R. Scott, Weilin Huang

One-stage object detection is commonly implemented by optimizing two sub-tasks: object classification and localization, using heads with two parallel branches, which might lead to a certain level of spatial misalignment in predictions between the two tasks.

Object object-detection +1

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