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Real-world Anomaly Detection in Surveillance Videos

This repository provides the implementation for the paper 'Real-world Anomaly Detection in Surveillance Videos' by Waqas Sultani, Chen Chen, Mubarak Shah.

Abstract

The project aims to detect anomolous activities in surveillance videos. A pre-trained 3-D convolution network was used to generate input feature vectors and using multiple instance learning an artificial neural network was trained for classification.

Prerequisites

Dataset:

UCF-Crime (http://crcv.ucf.edu/cchen/UCF_Crimes.tar.gz) courtesy of Waqas Sultani. It is the original dataset used for the aforementioned paper.

Tools:

Caffe, Facebook/C3D-1.0 (https://github.com/facebook/C3D), Tensorflow, Python

Implementation Details

PREPROCESSING:

Resize each video frame to 240*320 pixels and fix frame rate at 30fps.

FEATURE EXTRACTION:

C3D features for every 16-frame video clip followed by l2 normalization. To obtain features for a video segment, we take the average of all 16-frame clip features within that segment.

TRAINING:

We input these features (4096D) to a 3-layer FC neural network. The first FC layer has 512 units followed by 32 units and 1 unit FC layers. Using MIL we try to generate higher anomaly score for anomalous videos than normal videos.

Acknowledgments

• This project was only possible due the work done by Waqas Sultani, and his help during the course of this project.
• We are very gratefull to Dr. Rama Krishna Sai Gorthi, our academic advisor for the project.
• The inspiration behing the project was to look into the techniques for anomoly detection in videos and exploit such techniqes to develop a real time automated moderator for surveillance.

Contributers

• Abhay Pratap Singh
• Aditya Dhall

Citation

• Sultani, Waqas, Chen Chen, and Mubarak Shah. "Real-world Anomaly Detection in Surveillance Videos." Center for Research in Computer Vision (CRCV), University of Central Florida (UCF) (2018).