![]() On the other hand, this can become expensive. Ing a great deal of hard-drive space installed on the DVR is a good idea, because you can search for video from the DVR control program. Typical Retail Setup Selecting the best components is the hardest part of If this happens to you, you need a Wide Dynamic Range (WDR) camera, which lets you view the very dark and very bright parts of the picture simultaneously. Most cameras will show you a completely washed-out picture. Illuminate the area well, but never point a camera directly at a light source.Įntrance If your storefront is made of glass, the lighting will change over the course of the day. Varifocal cameras have adjustable lenses that allow you to get exactly the picture you want-zoom in to get a tight image with lots of detail, or zoom out for a wide overview. Hav-Ĭash Registers For this situation, install high-resolution, varifocal cameras. LONG-TERM ARCHIVING Backing up your data is always a safe bet. These individual cameras are expensive-the price of four or five fi xed cameras, typically-so only install a PTZ to cover large, open areas such as parking lots or lobbies. PTZ PTZ (Pan Tilt Zoom) cameras allow you to move the camera remotely until it’s oriented correctly, and to zoom precisely. Will part of the picture be very brightly lit and partly dark? A camera with Wide Dynamic Range (WDR) and dual shutter speeds will take each zone of the picture and expose it properly, allowing you to see a complete image of bright and dark areas. ![]() Will it always be dark? Will you need a camera to enhance available light? Outdoor cameras should have infrared illuminators to allow night vision. As of this writing, Mac-compatible DVR’s are rare. Many DVR’s have IP connections as well, allowing Internet connectivity via a PC and a router. Many security pros use 7.5 FPS as the standard recording rate. 24 FPS is reckoned as “real time.” Even 12 FPS seems close to real time. DVRs use video data processors to compress the video, cramming more video into the same amount of space, storing higher and higher frame rates (FPS or frames per second). Video storage used to be measured in hours it’s now measured in days, weeks-even months. Hard drives cost much less than their equivalent in VHS tape, and DVRs can also record multiple cameras. These are essentially computers that record video to hard drives. Picture detail was almost imperceptible.ĮNTER DVRS Digital Video Recorders (DVRs) were a huge step forward. For multiple cameras, you’d have to connect the VCR to a “mux,” or multiplexer, splitting the screen into 4, 9, or 16 segments, one for each camera. VCR’s only recorded one channel of video, too. The trade-off was that more compressed video rendered fewer details, because only a few pictures per minute were recorded. Otherwise, recording to VHS tape could get expensive quickly. You’d program them to record so many pictures (or frames) per minute a lower frame rate allowed more video to fit onto a single VHS tape. In the past, special VCR’s with time-lapse capability were popular. ![]() WHAT IF YOU CAN’T ALWAYS WATCH THE CAMERAS? You’ll need to record the video stream from the cameras. Congratulations! You’ve just built a CCTV system. Choose your wire (see the “UTP or Coax” box, opposite) and connect these components. GETTING STARTED A CCTV (Closed Circuit Television) system consists of a camera and monitor. With such a bewildering number of system options available, B&H can help you find the perfect solution to fit your needs and budget. SURVEILLANCE VIDEO AT A GLANCE Security is a huge concern for today’s home and small business owner.
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