Download Axis Network Video Certification Exam Practice and more Exams Science education in PDF only on Docsity!
Produces a color image in low light - answers -axis lightfinder Enables objects in both bright and dark areas to be visible - answers -wdr forensic capture Angle of illumination automatically adapts to camera's zoom level - answers -optimizedir Minimizes effects from vibration and shaking - answers -electronic image stabilization Four times higher resolution than standard hdtv 1080p resolution - answers -4k Vertical view for scenes such as hallways. Rotates aspect ratio from 16:9 to 9:16 - answers -corridor format Leverages the unique aspects of video surveillance to maintain lower bitrates while preserving forensic quality - answers -zipstream Product line: Q , p, m, f, v, t, a, c, s - answers -1st digit in axis naming convention Product type: 1-2: fixed 3-4: dome 5-6: ptz 7: encoder/decoder 8: system products 9: accessories - answers -2nd digit in axis naming convention
AXIS NETWORK
VIDEO
CERTIFICATION
EXAM PRACTICE
Series number - answers -3rd digit in axis naming convention
- hd resolution (720p/1080p)
- 25/30 fps
- 16:9 aspect ratio
- proper color fidelity - answers -hdtv standard by smpte a camera must meet the following requirements: Measure the resistance of a device to dust and moisture Solids: 1-6 (1st) Water: 1-9 (2nd) - answers -ip ratings (ingress protection) Is an interoperability standard that enables integration of devices from different manufacturers - answers -onvif (open network video interface forum) Influences the fov and focuses light - answers -lens Regulates the amount of light by controlling the size of the aperture - answers -iris Hole through which light enters - answers -aperture Converts light into digital signal - answers -sensor Processes a digital signal into an image - answers -processor Wide, normal, telephoto Short focal length>long - answers -lens types Fixed focal length - answers -fixed lens Variable focal length - must be refocused after changing fov - answers -varifocal lens Variable focal length w/ auto refocusing - answers -zoom lens Can sometimes be changed - answers -m12 lens Can always be changed - answers -c & cs-mount lens Can never be changed - answers -integrated lens Area before and after the focal point that appears acceptably focused - answers -depth of field (dof)
- large aperture
- telephoto lens
- close focal point - answers -reduces dof:
If you get twice as close you will receive 4 times as much light - answers -inverse square law of light The more sensitive the camera will be in low light - answers -lower the minimum illumination rating Of light a surface returns - answers -reflectance is the percentage Adjust white balance - answers -orangey image Block infrared light from reaching the sensor. At night the ir cut filter will mechanically slide to off allowing the sensor to use available ir sacrificing color. - answers -ir cut filter is used to Adjusts the beam angle to match the camera's fov - answers -optimizedir Light Heat - answers -visual cameras see ____. Thermal cameras see ____. Germanium - answers -lenses for thermal cameras are made of ____. Running number - answers -4th digit in axis naming convention Resolution: 1-9 - answers -5th digit in axis naming convention Vga 640x480 - answers -resolution 1 4cif 704x480 - answers -resolution 2 Svga 800x600 - answers -resolution 3 720p 1280x720 - answers -resolution 4 1080p 1920x1080 - answers -resolution 5 3/4mp 2560x1440 - answers -resolution 6 5mp 2592x1944 - answers -resolution 7 4k-15mp 3840x2160 - answers -resolution 8
15mp - answers -resolution 9 Active cooling - answers --c
Outdoor ready - answers --e Onboard illumination - answers --l Panoramic - answers --p Ruggedized - answers --r Vandal-resistant - answers --v Wireless - answers --w Stainless steel - answers --s Measure a devices ability to withstand mechanical impacts Ik01-ik10+ - answers -ik ratings Detection across far distances and are suited for analytics - answers -thermal cameras excel at Cannot - answers -thermal cameras even at close range ____ identify. Securing a perimeter - answers -thermals are ideal for Monitor the temperature of objects within a scene. - answers -some thermal cameras can The rate at which a material radiates thermal energy. Gold: .02-. Aluminum: .2-. Granite:. Sand:. Water:. Human skin: .98 - answers -emissivity The amount of data in a video stream - answers -bitrate is The capacity of the connection - answers -bandwidth is Bits per second (bps) - answers -bitrate and bandwidth are measured in Bytes. 8 bits = 1 byte - answers -storage is measured in Fully recoverable but yields modest savings - answers -lossless compression is
Bitrate - answers -decreasing the gop increases the frequency of bandwidth intensive i- frames which raises the Less important parts of the scene are compressed more while details preserved in vital areas. 50% or more bitrate savings Works with both h.264/.265 - answers -zipstream Preserve forensic detail in important parts of scene - answers -zipstream uses rois (regions on interest) to When no activity present it permits zipstream to refrain from pulling redundant i frames to conserve bandwidth - answers -dgop Allows camera to adjust the frame rate based on activity - answers -dfps Is a framework for understanding where a process occurs in networking. 7 layers - answers -osi model Network interface card connects a device to the network. Layer 1 and 2 connection - answers -nic Unique identifier for device. In some cases serves as the serial number - answers - media access control (mac) Broadcast, unicast, multicast - answers -data transmission methods Message sent to all recipients on network - answers -broadcast One sender to one receiver - answers -unicast One to many. Conserves bandwidth - answers -multicast Connect networks. On the lan, routers assign and manage device ip addresses via dynamic host control protocol dhcp - answers -routers Divides the network on the datalink layer - answers -vlan Divides the network on the network layer - answers -subnet, subnetwork Used to look up urls and find the correct ip addresses - answers -dns Eliminates the need for port forwarding by using servers to authenticate, encrypt, and distribute video streams - answers -axis secure remote access Another means of connecting to a private network. Secure - answers -vpn
Network time protocol enables clock synchronization between devices on a network by means of an ntp server - answers -ntp Encrypts individual packets during tranmission - answers -using https Allows you to monitor data from devices and collect info on the health of the network - answers -simple network management protocol (snmp) Provides port-based authentication. If a connecting device doesn't have the proper credentials it wont be permitted to send or receive network traffic - answers -ieee 802.1x Allows you to plan your entire project with a single tool. It can be used to compose scenes, generate a bill of materials, create a configuration file to import project settings into axis camera station - answers -axis site designer Created between the camera and the target along the horizontal plane. Harsh angles will compromise image usability - answers -horizontal angle of incidence Created between the camera and the subject along the vertical plane. Harsh angles will compromise the cameras ability to identify - answers -vertical angle of incidence Refers to the % of pixels covering the target area. Changing scene margins is one way to increase pixels on target - answers -pixels on target Rotating the camera 90 degrees physically and in the software - answers -corridor format Bandwidth, storage - answers -frame rate determines context. Higher frame rates deliver additional context at the expense of increased _____ and ______ needs Number of pixels that compromise a target. Increasing pixel density increases target detail - answers -pixel density Increases - answers -increasing resolution _____ pixel density. Increases - answers -increasing focal length ____ pixel density. Increases - answers -decreasing target distance ____ pixel density. 7+ pixels 40+ pixels 150+ pixels - answers -detection, recognition, identification Taking the horizontal resolution divided by the scene width at the point of capture - answers -pixel density is calculated by
