Publications

Selected work on VLM / M-LLM, multimodal understanding, and efficient learning systems.
For the full list, please see my Google Scholar.

Technical Reports

• Nova 2 — Multimodal reasoning and generation foundation models.
  Nova 2 Technical Report

• Nova Multimodal Embedding — Multimodal embeddings for agentic RAG and semantic search across video, image, document, and audio.
  Nova MM-embedding Technical Report

• Nova 1 / Nova 1 Premier — Earlier-generation multimodal foundation models.
  Nova 1 · Nova 1 Premier

VLM / M-LLM

• ICCV 2025 — Semi-supervised learning with pseudo-label semantic guidance for fine-grained classification.
  Boosting Semi-Supervised Learning for Fine-Grained Classification through Pseudo-Label Semantic Guidance

• WACV 2025 — Multi-grained video–text learning via dataset granularity expansion and scalable alignment modeling.
  Granularity Expansion and Iterative Approximation for Scalable Multi-grained Video-language Learning

• WACV 2025 — End-to-end vision-to-text audio description: detect AD events + generate scripts with long-context modeling.
  Context-Aware Automatic Audio Description

• ECCV 2024 — Video MAE with text-guided masking + joint video-text contrastive learning for better representations.
  Text-Guided Video Masked Autoencoder

• NeurIPS 2024 — Learnable token merging for long-form video transformers (big memory/throughput wins).
  Video Token Merging

• ICCV 2023 — Motion-aware masking for spatiotemporal representation learning.
  Motion-Guided Masking for Spatiotemporal Representation Learning

• CVPR 2023 — CLIP-style pretraining with finite discrete tokens to close granularity gaps between vision and language.
  Revisiting Multimodal Representation in Contrastive Learning: From Patch and Token Embeddings to Finite Discrete Tokens

Multimodal Understanding

• ICCV 2023 — Multimodal alignment/fusion for long-form cinematic video segmentation across modalities.
  Multimodal alignment aggregation and distillation for cinematic video segmentation

• ICASSP 2023 — Audio modeling with causal audio transformers + multi-resolution features.
  Causal Audio Transformer for Audio Classification

• CVPR 2022 (Oral) — Tubelet transformer for spatiotemporal action detection (end-to-end tube detection).
  Tubelet Transformer for Video Action Detection

• CVPR 2022 — Identity-free person similarity learning.
  Id-Free Person Similarity Learning

• CVPR 2022 (Oral) — Semantic+spatial refined transformer for human–object interaction detection.
  SSRT for HOI

• WACV 2022 — Action recognition by focusing on important temporal segments.
  Non-uniform Temporal Aggregation for Action Recognition

• NeurIPS 2021 (Spotlight) — Online action detection with long/short-term temporal modeling.
  Long Short-Term Transformer for Online Action Detection

• ICCV 2021 — Video transformer without convolutions (video understanding architecture).
  Video Transformer Without Convolutions

• CVPR 2021 — Siamese multi-object tracking.
  SiamMOT

• ICCV 2021 — Video–language contrastive learning using global context.
  Video Contrastive Learning with Global Context

• WACV 2022 — Unsupervised temporal action segmentation via self-supervised co-occurrence parsing.
  Self-supervised Co-occurrence Action Parsing for Unsupervised Temporal Action Segmentation

• ECCV 2020 — Make convolution temporal aware. Directional Temporal Modeling

Learning Methods, Efficiency & Others

• WACV 2023 — Frequency-domain image modeling.
  Discrete Cosin Transformer

• CVPR 2022 (Oral) — Memory-efficient training for video models (stochastic backprop / gradient dropout).
  Stochastic Backpropagation / Temporal Gradient Dropout

• ICCV 2021 — Efficient inference via selective feature compression.
  Selective Feature Compression for Efficient Activity Recognition Inference

• CVPR 2021 — Multi-label activity recognition with label correlations.
  Multi-Label Activity Recognition

• Pre-print — A survey of recent action recognition methods for Gluon CV release.
  A Comprehensive Study of Deep Video Action Recognition
  GluonCV

• Open Source (2021) — Multimodal research toolkit.
  GluonMM