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INSTALLING AUDIO VIDEO CCTV SYSTEM 3. Explain the principles of camera placement monitoring By Sarbini S.Pd, SMK Muh 3 Yogyakarta)
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CCD CAMERA Key factors in the design of CCTV system is a camera. CCD (charge couple device) is a camera’s product of the most preferred CCD EXAMPLE
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THE ADVANTAGE OF CCD Easily operated Increasing of usage Small, wrapped concise Sensitivity perfect Slightly more sensitive to EMI (Electromagnetic Interference) and RFI (Radio Frequency Interference). Cost effective.
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CCD PRINCIPLE CCD image sensor is actually a series of integrated (IC). A series of integrated surface is surface of the sensor flat establish order device (pixels) sensitive light.
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Light knock down this formation cause causes electron flow with a comparable number of light that allows a particular pixel. In fact, the actually process is more complicated, some variation depending on the particular technology used CCD
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CCD TECHNOLOGY MOS (Metal Oxide Semiconductor) Sensitivity and low resolution The results are very satisfactory condition of the light Illuminate Sharp image, waved There is shadows Image detail lost in dark Interline transfer Sensitivity can be improved Flexible (light / dark)
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Frame transfer. Area Picture Surface taker more wider CCD Frame transfer produces images of high quality Having IR sensitivity more on the less light Colors translate on day bright perfect Expensive
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CCD SENSOR Different Effect of Picture Resolution
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QUALITY DETERMINATE FACTORS AND REABILITY CCTV SYSTEM Image sensor Resolution comparison of signal to noise Auto light compensation Synchronize Output signal Environment condition and camera reliability Dimension and weight
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Resolution Namely the number of lines observed with the image sensor and the output from the camera. Resolution image sensor minimum 600 lines. Camera with lower resolution (home video camera 450 line resolution) may not provide the detail needed to detection.
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COMPARATION OF SIGNAL TO NOISE Namely the comparison number of visual noise in the video signal to the pure image information in the same signal. Noise in the form of snow often appear (there is a especially monitor when the camera transmitted black). All the camera noise. The good camera has comparison of S / N high and expressed in decibel.
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