Mahdyar Ravanbakhsh, Enver Sangineto, Moin Nabi and Nicu Sebe

SAP ML Research
Jan 2 · 1 min read

Winter Conference on Applications of Computer Vision (WACV 2019), Hawaii, USA

Abnormal crowd behaviour detection attracts a large interest due to its importance in video surveillance scenarios. However, the ambiguity and the lack of sufficient abnormal ground truth data makes end-to-end training of large deep networks hard in this domain. In this paper we propose to use Generative Adversarial Nets (GANs), which are trained to generate only the normal distribution of the data. During the adversarial GAN training, a discriminator (D) is used as a supervisor for the generator network (G) and vice versa. At testing time we use D to solve our discriminative task (abnormality detection), where D has been trained without the need of manually-annotated ab- normal data. Moreover, in order to prevent G learn a trivial identity function, we use a cross-channel approach, forcing G to transform raw-pixel data in motion information and vice versa. The quantitative results on standard benchmarks show that our method outperforms previous state-of-the-art methods in both the frame-level and the pixel-level evaluation.

PDF

SAP Leonardo Machine Learning Research

We are a part of SAP Leonardo Machine Learning and this is our blog where we write about our current research projects and share the latest news. For more information about SAP Leonardo Machine Learning visit: sap.com/ML

SAP ML Research

Written by

SAP Leonardo Machine Learning Research

We are a part of SAP Leonardo Machine Learning and this is our blog where we write about our current research projects and share the latest news. For more information about SAP Leonardo Machine Learning visit: sap.com/ML

Welcome to a place where words matter. On Medium, smart voices and original ideas take center stage - with no ads in sight. Watch
Follow all the topics you care about, and we’ll deliver the best stories for you to your homepage and inbox. Explore
Get unlimited access to the best stories on Medium — and support writers while you’re at it. Just $5/month. Upgrade