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 Post subject: What causes that?
PostPosted: Tue Dec 06, 2016 10:57 pm 
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Hi everyone

Just installed some new cameras at the factory where some of them have very poor night video quality with the screen filled with artifacts. Please see attached image. Sorry for the quality - I was getting those from remote location so quality has deteriorated even more but you can see the black artifacts all over the screen. During the day image is good but at night I am getting this kind of picture on some of the cameras.

Any Ideas?

Thank you


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 Post subject: Re: What causes that?
PostPosted: Wed Dec 07, 2016 7:02 pm 
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garbage cameras...you got what you paid for.


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 Post subject: Re: What causes that?
PostPosted: Thu Feb 09, 2017 10:46 pm 
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Yeah, it may be just poor cameras. Have you tried adding infrared light to the area to see if that helps? To test, you can get another camera and just run the power cable to it. When it's dark, the LED's will turn on and add more light. If that works well enough for you, they sell some add on infrafed led's on ebay.


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 Post subject: Re: What causes that?
PostPosted: Mon Jun 19, 2017 3:31 pm 
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Based on the image #2, taking a good look at the most bright part of the infrared illumination, the part that looks super white bright, I really doubt the adding of infrared illumination are going to get rid of the heavily pixelation. It looks like you have the camera's digital noise control level set to OFF, you should turn the camera's digital noise filter to at least Medium, that you will have to do it on the camera's itself with a small hand held monitor if the cameras has a small joystick for On Screen Diagnostics settings.


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 Post subject: Re: What causes that?
PostPosted: Mon Jun 19, 2017 7:13 pm 
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Like Boogie says - cheap cameras struggling with low light/IR conditions. When operating under IR there is a sweet spot. Any closer causes over exposure and a white "Casper the ghost" effect while any further away the IR is not up to it. When there is not enough light entering the camera lens the AGC (automatic gain control) winds up to increase the signal level BUT in doing this it also increases the noise level which is what your seeing. Add to this that the stated IR range of a camera can usually be halved to get an accurate range as against the "salesman range"

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