All ANVE Test Inside Axis Communications Questions

The reason why the camera is not blinded by the headlights is that an IR-pass filter is in use. This filter blocks out visible light, including the bright headlights, and allows only infrared light to pass through. This is particularly useful in nighttime surveillance scenarios where the camera can rely on infrared illumination instead of visible light, ensuring clear visibility even in the presence of bright lights like headlights.

"A longer focal length (such as 48 mm) results in a shorter depth of field compared to shorter focal lengths, meaning only a narrow range of distances will be in focus."

— Axis Communications Academy, Network Video Fundamentals, 2022

"Depth of field decreases as the focal length increases."

— Axis Lens Guide White Paper

Video analytics applications detect movement perpendicular to the camera more easily than movement toward or away from the camera. This is because objects moving perpendicular to the camera create more significant changes in the pixel patterns, making it easier for the analytics software to detect and analyze the movement. Movement toward or away from the camera results in smaller changes in pixel patterns, which can be harder to detect accurately. References: Axis Communications documentation on video analytics and movement detection.

OptimizedIR technology in Axis cameras refers to the intelligent adaptation of IR illumination to the camera's field of view. This ensures even illumination across the entire scene, reducing overexposure and underexposure caused by traditional fixed IR lights. The IR LEDs adjust their intensity and spread according to the zoom level and scene requirements, providing optimal image quality in low-light conditions. Axis documentation highlights OptimizedIR as a feature that enhances night-time surveillance by ensuring balanced lighting.