People counting analytics with Axis cameras are utilized for various purposes. In retail stores, these analytics provide valuable statistics on customer foot traffic, helping with operational and marketing decisions. Enhanced service levels for public transportation benefit from people counting by monitoring passenger loads and optimizing service schedules. Crowd detection for marketing purposes leverages the analytics to understand customer behavior and preferences in different areas, which can influence marketing strategies. Axis Communications highlights these use cases in their documentation, emphasizing the analytics' role in improving operational efficiency and strategic planning.

When using an external IR illuminator with a beam angle significantly narrower than the field of view, the exposure may be uneven. This can result in parts of the image being overexposed (too bright) while other parts remain underexposed (too dark). Ensuring that the beam angle of the IR illuminator matches the field of view of the camera is essential for achieving uniform illumination across the entire surveillance area. Reference: Axis Communications IR Illumination Guide

An IR cut filter is used to block infrared light during daylight hours to prevent it from interfering with the camera's sensor. This ensures that the colors captured by the camera appear natural. Without an IR cut filter, the infrared light can cause color distortions, resulting in unnatural-looking images. Axis cameras equipped with IR cut filters switch between day and night modes to optimize image quality in various lighting conditions, as explained in their technical documents and user manuals.

Using bidirectional predictive interframe in H.264, also known as B-frames, will increase the latency in the system. B-frames depend on both previous and future frames (I-frames and P-frames) for encoding, which requires more processing time and thus increases the latency. This trade-off allows for more efficient compression and smaller file sizes but at the cost of increased delay. Reference: Axis Communications documentation on H.264 video compression and the use of B-frames.

The main benefit of using Power over Ethernet (PoE) is cost reduction in installation. PoE allows network cables to carry both data and power, eliminating the need for separate power lines and reducing the amount of cabling required. This simplifies installation, reduces material costs, and allows greater flexibility in camera placement. Axis Communications notes that PoE significantly cuts down on installation expenses by streamlining the infrastructure needed for network devices.