Axis Communications ANVE - Axis Network Video Exam

If the live Motion JPEG video appears pixelated without digital zoom, decreasing the image compression would be the best approach to improve the image quality. Higher compression reduces the amount of data and can result in pixelation. By lowering the compression, the image retains more data and detail, thus reducing pixelation.

"Box cameras are designed to be versatile and typically feature C or CS-mounts, allowing users to select from a range of lenses to suit their surveillance needs."

— Axis Communications Academy, Network Video Fundamentals, 2022

"A box camera uses interchangeable C or CS-mount lenses, offering flexibility in lens choice depending on the application."

— Axis Box Cameras Overview

The background of the scene is slightly out of focus due to a shallow depth of field. Depth of field refers to the range of distance within a photo that appears acceptably sharp. A shallow depth of field results in a narrow focus area, causing objects outside this area to appear blurred. This can be influenced by the aperture setting of the lens, the focal length, and the distance to the subject. Axis documentation on camera setup and focus adjustments provides guidance on managing depth of field to ensure optimal image clarity.

“Axis devices can use action rules with conditions such as schedule, input, or motion detection. For example, an action rule can be set to play a sound through a network speaker if motion is detected outside of business hours.”

— Axis Communications Academy, Network Video Fundamentals, 2022

“Action rules allow users to automate responses to events by setting conditions. Example: If motion is detected after hours, play a pre-recorded message on a network speaker.”

— Axis Device Event Configuration Guide

If an object is placed 1 meter (3 feet) away from a light source with a lux level of 3200 lux, the lux level decreases according to the inverse square law of light. At a distance of 8 meters (24 feet), the lux level can be calculated as:

New Lux Level=3200 lux(8/1)2=3200 lux64=50 lux\text{New Lux Level} = \frac{3200 \text{ lux}}{(8/1)^2} = \frac{3200 \text{ lux}}{64} = 50 \text{ lux}New Lux Level=(8/1)23200 lux​=643200 lux​=50 lux

Thus, at 8 meters, the light intensity drops significantly to 50 lux.

The XF/XP product line is specifically designed for hazardous areas. These cameras are certified for use in environments where flammable gases, vapors, or dust may be present. They meet the necessary safety and compliance standards for such conditions, making them suitable for deployment in hazardous areas. This recommendation is based on Axis Communications’ documentation on product lines certified for hazardous environments.

"Color temperature describes the color characteristics of a light source and is measured in Kelvin. Lower values (e.g., 2700K) are perceived as warm (yellow/red), while higher values (e.g., 6500K) are cool (blue/white)."

— Axis Communications Academy, Network Video Fundamentals, 2022

"Lower color temperatures are described as warm, higher values as cool."

— Axis White Balance and Color Temperature Guide

Axis Official Documentation Extract:

"Axis products support the most widely used video compression formats, including Motion JPEG (MJPEG), H.264, and H.265 (HEVC). These formats allow Axis cameras to provide flexible, high-quality, and efficient video streams suitable for a variety of surveillance needs."

— Source: Axis Communications, Video Compression Technologies

Axis Study Guide Reference:

"The primary compression standards supported by Axis network video products are MJPEG, H.264, and H.265. These standards are designed for efficient transmission and storage while maintaining optimal image quality."

— Axis Communications Academy, Network Video Fundamentals, 2022

Explanation of Options:

A. H.264: Supported. H.264 is a widely used video compression standard in Axis products.

B. MJPEG: Supported. MJPEG (Motion JPEG) is supported for scenarios requiring individual frames.

F. H.265: Supported. H.265, also known as HEVC, is supported for more efficient compression.

C. DivX: Not supported. DivX is not used in professional surveillance.

D. SIP: Not a video compression format; it’s a communication protocol.

E. RTSP: Not a compression algorithm; it's a streaming protocol.

"PoE class 3 delivers up to 15.4 W per port (PSE), with 12.95 W available to the device (PD).

16 × 15.4 W = 246.4 W, but only 16 × 12.95 W = 207.2 W is actually drawn by the devices.

As the total available switch power is 240 W, it can handle 16 PoE class 3 cameras (assuming the draw is calculated at PD consumption)."

— Axis Power over Ethernet Guide

"Class 5 (40 W per camera) and mixed Class 4/Class 5 configurations would exceed the 240 W total switch budget."

— Axis Communications Academy, Network Video Fundamentals, 2022

"A shorter exposure time, such as 1/500 second, is recommended for capturing fast-moving objects in order to minimize motion blur, especially in well-lit conditions where there is sufficient light for proper exposure."

— Axis Communications Academy, Network Video Fundamentals, 2022

"To freeze fast-moving subjects, use fast shutter speeds such as 1/500s or shorter."

— Axis Web Article: Shutter and Exposure