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cctv

 
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MessagePosté le: Mer 8 Mar - 12:49 (2017)    Sujet du message: cctv Répondre en citant

Light and television, starts with a little bit of history so we can gain a wider perspective of the television revolution. Then IP surveillance we go to the very basics of human vision: light and the human eye. It is necessary to explain the human eye and how it works because television relies greatly on the human eye’s physiology. It is interesting to compare the similarities between the eye’s and the camera’s operation. Apart from the discussion on how lenses work and what their most important features are, there is also a practical explanation of how IP cameras and what to adjust (ALC and Level) on a lens, how to determine a focal length for a particular angle of view, and very important for CCTV, how back-focusing should be done. Also, C and CS-mounts are discussed and explained, as well as various chip sizes.
General Characteristics of television systems,is very important, especially for readers without prior knowledge of how television works. I have discussed both major standards PAL and NTSC. I do apologize to readers using the SECAM for not going into detail on this standard. I simply could not find sufficient literature to study it, although there are many similarities with PAL, at least in the number of ultra hd cameras and fields per second used.
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MessagePosté le: Mer 8 Mar - 12:49 (2017)    Sujet du message: Publicité

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