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Tianjian Meng

7 accepted papers

2025

DeCafNet: Delegate and Conquer for Efficient Temporal Grounding in Long Videos

CVPR 2025poster

Long Video Temporal Grounding (LVTG) aims at identifying specific moments within lengthy videos based on user-provided text queries for effective content retrieval. The approach taken by existing methods of dividing video into clips and processing each clip via a full-scale expert encoder is challen…

2025

Hummingbird: High Fidelity Image Generation via Multimodal Context Alignment

ICLR 2025poster

While diffusion models are powerful in generating high-quality, diverse synthetic data for object-centric tasks, existing methods struggle with scene-aware tasks such as Visual Question Answering (VQA) and Human-Object Interaction (HOI) Reasoning, where it is critical to preserve scene attributes in…

2022

DeepFusion: Lidar-Camera Deep Fusion for Multi-Modal 3D Object Detection

CVPR 2022poster

Lidars and cameras are critical sensors that provide complementary information for 3D detection in autonomous driving. While prevalent multi-modal methods simply decorate raw lidar point clouds with camera features and feed them directly to existing 3D detection models, our study shows that fusing c…

Cited by 476PDFcodeScholar
2021

Spatiotemporal Contrastive Video Representation Learning

CVPR 2021poster

We present a self-supervised Contrastive Video Representation Learning (CVRL) method to learn spatiotemporal visual representations from unlabeled videos. Our representations are learned using a contrastive loss, where two augmented clips from the same short video are pulled together in the embeddin…

Cited by 614PDFcodeScholar
2020

Go Wide, Then Narrow: Efficient Training of Deep Thin Networks

ICML 2020poster

For deploying a deep learning model into production, it needs to be both accurate and compact to meet the latency and memory constraints. This usually results in a network that is deep (to ensure performance) and yet thin (to improve computational efficiency). In this paper, we propose an efficient…

Cited by 23SourcePDFScholar
2019

SSN: Learning Sparse Switchable Normalization via SparsestMax

CVPR 2019poster

Normalization methods improve both optimization and generalization of ConvNets. To further boost performance, the recently-proposed switchable normalization (SN) provides a new perspective for deep learning: it learns to select different normalizers for different convolution layers of a ConvNet. How…

Cited by 71PDFcodeScholar