GUI = A graphical user interface (GUI) is a human-computer interface (i.e., a way for humans to interact with computers) that uses windows, icons and menus and which can be manipulated by a mouse (and often to a limited extent by a keyboard as well).
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Full Duplex = A full-duplex system allows communication in both direction, and unlike half-duplex, allows this to happen simultaneously. Land-line telephone networks are full-duplex since they allow both callers to speak and be heard at the same time. A good analogy for a full-duplex system would be a two-lane road with one lane for each direction.…
So essentially what were talking about today is IP surveillance in the home, or as you may have seen splashed across any and all media outlets, the use of Nanny Cams. The long and short of it is your security and piece of mind when you are away is what I am talking about here. It’s crazy right? No? Well good and to those out there who think its boring and your house and children don’t need a camera watching over them your house probably just got broken into. Ok, that’s a little bit dramatic but seriously you have got to become more hip to your families security, it is 2008. All you need is a camera and a recorder what else …
FPS = Frame rate, or frames per second. 30FPS is generally accepted as “real time.” Most security systems are set to record at 4-7FPS, but can also record at higher frame rates. Think about it like a photographer snapping photos of a scene, taking up to 30 individual digital photos every second. The more FPS, the more bandwidth is necessary to transport the images.…
Fixed = Like the word implies, “fixed” cameras present a static image view. Fixed cameras are typically positioned and adjusted at the time of installation, as they cannot be remotely manipulated to change their default view.…
F = In optics, the f-number (sometimes called focal ratio, f-ratio, or relative aperture) of an optical system expresses the diameter of the entrance pupil in terms of the effective focal length of the lens; in simpler terms, the f-number is the focal length divided by the aperture diameter. It is a dimensionless number that is a quantitative measure of lens speed, an important concept in photography. Depth of field increases with f-number, as illustrated in the photos below:
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DVR = Digital Video Recorder. Fundamentally not much different than the TiVo box sitting on top of your television, but it records video streams from analog security cameras as opposed to your favorite television shows.
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Dome Camera = A type of camera with a dome-like shape. Some come with infrared lighting and some are designed to be tamper-proof. Dome cameras can be analog or IP, fixed, Pan/Tilt or full PTZ. Dome cameras are typically ceiling-mounted or placed under an overhang, but can occasionally be wall mounted depending upon your particular application.
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Digital Zoom = Digital zoom is not really zoom, in the strictest definition of the term. What digital zoom does is enlarge a portion of the image, thus ‘simulating’ optical zoom. In other words, the camera crops a portion of the image and then enlarges it back to size. In so doing, you lose image quality. If you’ve been regularly using digital zoom and wondered why your images did not look that great, now you know.…
Day/Night Camera = “Day/Night Cameras” are regular cameras with an especially sensitive CCD chip that allows a good image to be captured in very low ambient lighting (regular lighting – not infrared). Do not confuse these cameras with “Night Vision” cameras which is another name for infrared (IR) cameras. Refer to the manufacturer specification to determine if your particular camera is classified as a “Day/Night” camera.…