CAPE Advanced Technology Lecture
DetClip: Scalable Open-Vocabulary Object Detection via Fine-grained Visual-language Alignment
Wednesday, January 18 2023 14:00
EEDB Seminar Room, Electrical Engineering Building, Cambridge and online
For online attendees, please register at: https://eng-cam.zoom.us/j/81023462406
Speaker: Dr Wei Zhang Director, Huawei London Research Centre
Abstract
We will present efficient and scalable training framework that incorporates large-scale image-text pairs to achieve open-vocabulary object detection (OVD). Unlike previous OVD frameworks that typically rely on a pre-trained vision-language model (e.g., CLIP) or exploit image-text pairs via a pseudo labelling process, DetCLIP directly learns the fine-grained word-region alignment from massive image-text pairs in an end-to-end manner. We employ a maximum word-region similarity between region proposals and textual words to guide the contrastive objective. To enable the model to gain localization capability while learning broad concepts, DetCLIP is trained with a hybrid supervision from detection, grounding and image-text pair data under a unified data formulation. By jointly training with an alternating scheme and adopting low-resolution input for image-text pairs, DetCLIP exploits image-text pair data efficiently and effectively
Biography
Dr Wei Zhang joined Huawei in 2012. Before that, he was an assistant researcher in Shenzhen Institute of Advanced Technology Chinese Academy of Sciences and in The Chinese University of Hong Kong (CUHK). He received his Ph.D. degree in computer science from CUHK in 2010, his MS degree from Tsinghua University in 2005 and his B.S. from Nankai University in 2002. He was Cco-organizer of the “Self-supervised Learning for Next-Generation Industry-level Autonomous Driving” workshop at ECCV 2022 and ICCV 2021 .
