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[bibtex]@InProceedings{Cheng_2021_WACV, author = {Cheng, Yuan and Yang, Yuchao and Chen, Hai-Bao and Wong, Ngai and Yu, Hao}, title = {S3-Net: A Fast and Lightweight Video Scene Understanding Network by Single-Shot Segmentation}, booktitle = {Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision (WACV)}, month = {January}, year = {2021}, pages = {3329-3337} }
S3-Net: A Fast and Lightweight Video Scene Understanding Network by Single-Shot Segmentation
Abstract
Real-time understanding in video is crucial in various AI applications such as autonomous driving. This work presents a fast single-shot segmentation strategy for video scene understanding. The proposed net, called S3-Net, quickly locates and segments target sub-scenes, meanwhile extracts structured time-series semantic features as inputs to an LSTM-based spatio-temporal model. Utilizing tensorization and quantization techniques, S3-Net is intended to be lightweight for edge computing. Experiments using CityScapes, UCF11, HMDB51 and MOMENTS datasets demonstrate that the proposed S3-Net achieves an accuracy improvement of 8.1% versus the 3D-CNN based approach on UCF11, a storage reduction of 6.9x and an inference speed of 22.8 FPS on CityScapes with a GTX1080Ti GPU.
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