Event camera for surveillance - Capabilities and limitations
Publish date: 2024-02-19
Report number: FOI-R--5543--SE
Pages: 35
Written in: Swedish
Keywords:
- surveillance
- event camera
- neuromorphic sensor
Abstract
The event camera is a new type of sensor where each pixel independently generates information about changes in light intensity. This provides many advantages compared to conventional cameras such as a high temporal resolution, low latency, high dynamic range, low bandwidth, and low power consumption. Conventional cameras currently used in surveillance applications have a large redundancy in collected data as the whole image is updated regularly, at a relatively low rate, regardless of whether there is new information. They also struggle with large variations in lighting conditions as all the pixels in the image share the same exposure time. The high temporal resolution of the event camera enables the capture of fast processes such as muzzle flares, and frequency analysis methods can be used to detect propellers and other characteristic frequencies on objects. The high dynamic range makes the event camera robust to overexposure and allows operation in low light conditions. The low power consumption is an advantage when conducting surveillance far from existing infrastructure. Today, event cameras have affordable prices, but they need to be combined with automatic analysis methods to be used for surveillance applications. In this report, we describes some possible surveillance applications for the event camera.