By Herman Kruegle
This revision of the vintage ebook on CCTV expertise, CCTV Surveillance, presents a complete exam of CCTV, protecting the functions of assorted platforms, easy methods to layout and set up a method, and the way to decide on definitely the right undefined. taking into consideration the ever-changing advances in know-how utilizing electronic suggestions and the net, CCTV Surveillance, moment variation, is totally up-to-date with the new developments in electronic cameras and electronic recorders, distant tracking through the web, and CCTV integration with different protection systems.
Continuing within the celebrated culture of the 1st version, the second one variation is written to function an invaluable source for the end-user in addition to the technical practitioner. each one bankruptcy starts off with an outline, and provides the newest info at the appropriate gear, describing the features, positive aspects and alertness of every machine. insurance of getting older or out of date know-how is diminished to a historic standpoint, and 8 fresh chapters disguise electronic video know-how, multiplexers, built-in camera-lens-housing, clever domes, and swift deployment CCTV systems.
* Serves as an imperative source on CCTV theory
* comprises 8 new chapters at the use of electronic elements and different comparable applied sciences that experience noticeable a up to date explosion in use
* totally illustrated, the booklet includes thoroughly up to date photos and diagrams that symbolize the newest in CCTV expertise developments
Read or Download CCTV Surveillance, Second Edition: Video Practices and Technology PDF
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Additional resources for CCTV Surveillance, Second Edition: Video Practices and Technology
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.
Making these distinctions depends on the system’s resolution, contrast, and signal-to-noise ratio (S/N). In a typical scene the average observer can detect a target about one-tenth of a degree in angle. This can be related to a standard video picture that has 525 horizontal lines (NTSC) and about 350 TV line vertical and 500 TV line horizontal resolution. 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.
Narrow-FOV or telephoto lenses have high magnification, with high resolution and high identification capabilities. 4 Scene Temperature Scene temperature has no effect on the video image in a CCD, CMOS, or ICCD sensor. These sensors do not respond to temperature changes or temperature differences in the scene. On the other hand, IR thermal imaging cameras do respond to temperature differences and changes in temperature in the scene. Thermal imagers do not respond to visible light or the very near-IR radiation like that produced by IR LEDs.