In this investigation we study the effects of compression and frame rate reduction on the performance of four video
analytics (VA) systems utilizing a low complexity scenario, such as the Sterile Zone (SZ). Additionally, we identify the
most influential scene parameters affecting the performance of these systems. The SZ scenario is a scene consisting of a
fence, not to be trespassed, and an area with grass. The VA system needs to alarm when there is an intruder (attack)
entering the scene. The work includes testing of the systems with uncompressed and compressed (using H.264/MPEG-4
AVC at 25 and 5 frames per second) footage, consisting of quantified scene parameters. The scene parameters include
descriptions of scene contrast, camera to subject distance, and attack portrayal. Additional footage, including only
distractions (no attacks) is also investigated. Results have shown that every system has performed differently for each
compression/frame rate level, whilst overall, compression has not adversely affected the performance of the systems.
Frame rate reduction has decreased performance and scene parameters have influenced the behavior of the systems
differently. Most false alarms were triggered with a distraction clip, including abrupt shadows through the fence.
Findings could contribute to the improvement of VA systems.