By Herman Kruegle
This revision of the vintage publication on CCTV know-how, CCTV Surveillance, offers a entire exam of CCTV, overlaying the functions of assorted platforms, the best way to layout and set up a process, and the way to decide on the correct undefined. considering the ever-changing advances in expertise utilizing electronic recommendations and the web, CCTV Surveillance, moment version, is totally up to date with the new developments in electronic cameras and electronic recorders, distant tracking through the net, and CCTV integration with different safety platforms. carrying on with within the celebrated culture of the 1st variation, the second one variation is written to function an invaluable source for the end-user in addition to the technical practitioner. every one bankruptcy starts off with an summary, and offers the newest info at the proper gear, describing the features, good points and alertness of every equipment. assurance of getting older or out of date know-how is decreased to a old standpoint, and 8 fresh chapters hide electronic video expertise, multiplexers, built-in camera-lens-housing, clever domes, and fast deployment CCTV structures. * Serves as an vital source on CCTV conception* comprises 8 new chapters at the use of electronic elements and different similar applied sciences that experience noticeable a up to date explosion in use * totally illustrated, the e-book includes thoroughly up-to-date images and diagrams that symbolize the newest in CCTV expertise developments
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Additional info for CCTV Surveillance, 2nd Edition 2006 Video Practices and Technology
The camera converts the optical image produced by the lens into a time-varying electric signal that changes (modulates) in accordance with the light-intensity distribution throughout the scene. Other camera electronic circuits produce synchronizing pulses so that the timevarying video signal can later be displayed on a monitor or recorder, or printed out as hard copy on a video printer. While cameras may differ in size and shape depending on specific type and capability, the scanning process used by most cameras is essentially the same.
Light from the illumination source reflects off the scene. The lens collects the light from the scene CONSOLE MONITORING SITE MONITOR (CRT/LCD) VIDEO CAMERA TRANSMISSION MEANS COAX CABLE COAXIAL UTP (UNSHILDED TWISTED PAIR) OPTICAL LENS VIDEO PRINTER SCENE ILLUMINATION SOURCE (NATURAL, ARTIFICIAL) FIGURE 2-1 Single camera video system VIDEO RECORDER (DVR/VCR) Video Technology Overview • • • • • and forms an image of the scene on the light-sensitive camera sensor. Camera. The camera sensor converts the visible scene formed by the lens into an electrical signal suitable for transmission to the remote monitor, recorder, and printer.
Figure 2-12 and Table 2-3 summarize the number of lines required to detect, orient, recognize, or identify an object in a television picture. The number of TV lines required will increase for conditions of poor lighting, highly complex backgrounds, reduced contrast, or fast movement of the camera or target. 2 Reflectivity The reflectivity of different materials varies greatly depending on its composition and surface texture. Table 2-4 gives DETECTION 1 TV LINE ORIENTATION 2 TV LINES RECOGNITION 5 TV LINES IDENTIFICATION 7 TV LINES NOTE: 1 TV LINE (BRIGHT AND DARK LINE) = 1 LINE PAIR FIGURE 2-12 Object size vs.
CCTV Surveillance, 2nd Edition 2006 Video Practices and Technology by Herman Kruegle