CCTV Cameras-2.pdf - Sofab.net

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Video Storage Capacity Calculation Video Storage Capacity Calculation for Analog Cameras Camera Type : Compression of Video Streaming at 480TVL to 550TVL (Analog MJPEG) Picture Size : Size of Picture Frame (40K) Count : Number of Cameras installed on one Network (16) FPS : Select the Number of Frames per Second.mm 5 FPS, Banks Require min 10FPS to 30FPS H/Day : Number of Continues Recording Hours per day ,or you may chose motion and thus put 8 as 8 hours of motion Days : Number of Recording Days Per Month Mobit/s : Use only for IP Cameras Tera Byte : Hard Disk Storage Required per CCTV Network per the Given Data 272 Tel.: + 966 2 683 690 3631 0244 Fax: + 966 2 682 690 6351 0675 Code J
CCD and CMOS Image Sensors CCD (Charge Coupled Device) CMOS (Complementary Metal Oxide Semiconductor) Both image sensors have two different technologies for capturing images digitally. Each has unique strengths and weaknesses giving advantages in different applications. Neither is categorically superior to the other, although vendors selling only one technology have usually claimed otherwise. In the last five years much has changed with both technologies, and many projections regarding the demise or ascendence of either have been proved false. The current situation and outlook for both technologies is vibrant, but a new framework exists for considering the relative strengths and opportunities of CCD and CMOS imagers. The basic concept is that you will get a much better image from a CCD camera then you will from a CMOS camera. Camera with a CCD Image Sensor Camera with a CMOS Image Sensor Sample Image Sample Image CCD VS CMOS CCD cameras produce a higher quality picture mainly because the image sensor is used strictly for collecting the image and all of the other necessary processing that it takes to deliver the image to the video output of the camera are handled by other components on the camera board. With a CMOS camera the image senor is not only used to collect the image but it’s also used to process the image. This means several things. One being that that camera is slower at doing what cameras do “Collect light and convert it to a useable image”. The same chip that is used to collect the light is also used to do the necessary processing that it takes to deliver the image to the video output. This means that the process is slower and the image that is products is of lesser quality. CMOS cameras do have the advantage when it come to power consumption. Because there are less components in the camera board it draws less power meaning that it will run longer if used on a battery. CCD cameras on the other hand have more components but produce a much higher quality image and draw more powder. This is why most cell phones use CMOS because it doesn’t put such a heavy load on the phone battery. Then phones that do actually have CCD camera will give a better picture but the battery won’t last nearly as long. Code Web: Web: www.sofab.net www.sofab.cc Email: Email: help@sofab.net help@sofab.cc 273 J
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