# ResnetCrowd: A Residual Deep Learning Architecture for Crowd Counting, Violent Behaviour Detection and Crowd Density Level Classification

## TL;DR

ResnetCrowd introduces a multi-task deep residual network for crowd analysis tasks, leveraging a new annotated dataset to improve performance across crowd counting, violent behaviour detection, and density classification.

## Contribution

The paper presents ResnetCrowd, a novel multi-objective deep learning architecture and a new dataset for comprehensive crowd analysis.

## Key findings

- Multi-task learning improves individual task accuracy.
- Violent behaviour detection sees a 9% ROC AUC boost.
- Model generalizes well across multiple benchmarks.

## Abstract

In this paper we propose ResnetCrowd, a deep residual architecture for simultaneous crowd counting, violent behaviour detection and crowd density level classification. To train and evaluate the proposed multi-objective technique, a new 100 image dataset referred to as Multi Task Crowd is constructed. This new dataset is the first computer vision dataset fully annotated for crowd counting, violent behaviour detection and density level classification. Our experiments show that a multi-task approach boosts individual task performance for all tasks and most notably for violent behaviour detection which receives a 9\% boost in ROC curve AUC (Area under the curve). The trained ResnetCrowd model is also evaluated on several additional benchmarks highlighting the superior generalisation of crowd analysis models trained for multiple objectives.