Profile

Hey there. I am Di Chen, an algorithm researcher working at Alibaba TongYi Vision Intelligence Lab.

I got my Ph.D. degree in Computer Science at Nanjing University of Science and Technology. My supervisors are Prof. Jian Yang and Prof. Shanshan Zhang. During 2019-2020, I was a visiting scholar at Max-Planck-Institut für Informatik, supervised by Prof. Dr. Bernt Schiele.

My research interests encompass computer vision, specifically person search (a task that combines pedestrian detection and person re-identification), multiple object tracking, and face recognition. At present, I’m focusing on generative models, particularly text-to-image/video methods.

Experience

Algorithm Researcher Alibaba | 2021.07 – present • Tongyi Wanxiang (通义万相): A text-to-image service based on our research project Composer • Diffusion model distillation & acceleration • Neural Radiance Fields, 3D reconstruction • Large scale ****diffusion models for Taobao image generation and inpainting/outpainting • Multi-modal retrieval for large scale data collection/filtering

Publications

Generative Models

Ranni: Taming Text-to-Image Diffusion for Accurate Instruction Following, 2024, CVPR (Oral) bibtex code page pdf
Composer: Creative and Controllable Image Synthesis with Composable Conditions, 2023, ICML pdf

Neural Radiance Fields

GeoAug: Data Augmentation for Few-Shot NeRF with Geometry Constraints, 2022, ECCV bibtex pdf poster

Person Search/Detection/Re-Identification

Divide and Conquer: Hybrid Pre-training for Person Search, 2024, AAAI bibtex code pdf
Keypoint Message Passing for Video-based Person Re-Identification, 2022, AAAI (Oral) bibtex pdf
PoseTrack21: A Dataset for Person Search, Multi-Object Tracking and Multi-Person Pose Tracking, 2022, CVPR bibtex pdf
Grouped Adaptive Loss Weighting for Person Search, 2022, ACM MM bibtex pdf
Norm-Aware Embedding for Efficient Person Search And Tracking, 2021, IJCV bibtex pdf
Guided Attention in CNNs for Occluded Pedestrian Detection and Re-Identification, 2021, IJCV bibtex pdf
Norm-Aware Embedding for Efficient Person Search, 2020, CVPR bibtex code pdf poster
Hierarchical Online Instance Matching for Person Search, 2020, AAAI bibtex code pdf poster slides
Person Search by Separated Modeling and A Mask-Guided Two-Stream CNN Model, 2020, TIP bibtex pdf
Person Search via A Mask-Guided Two-Stream CNN Model, 2018, ECCV bibtex blog pdf poster

Representation Learning

Animating Images to Transfer CLIP for Video-Text Retrieval, 2022, SIGIR bibtex pdf
Joint Bayesian Guided Metric Learning for End-to-end Face Verification, 2018, Neurocomputing bibtex pdf