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Old December 3rd, 2011, 04:57 PM   #1 (permalink)
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Default CCTV colour problems! Post

Firstly let me apologise if Ive posted this in the wrong category!

Need some advice with a cctv system that I bought from Maplins (ok,ok you can stop laughing now!).

250gb DVR with 4 cameras - All working fine , apart from one problem...

The colours are all wrong! , Grass is showing as purple , and the driveway is currently a dull green! . The actual image quality is good and workable , but the colour is like something out of a 1960's festival! Tried swapping the camera , same problem.

Its BNC into the back of the DVR , and the output is currently BNC to scart adapter into a LED TV. (Tried it on another TV with the same issue.)

Thanks in advance for any help folks!

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Old December 3rd, 2011, 05:11 PM   #2 (permalink)
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So its BNC to BNC into the DVR then BNC to Scart out of the DVR?

Its definitely one of the cables or plugs/sockets.

First you need to work out which cable (or input/output) is affected by swapping one (or preferably both) out. Generally on a monitor, green will go purple if there is a bad connection on a Pin / wire within an analogue connection.

You could connect the BNC from the camera with the scart directly to teh TV too to rule out or identify an issue with the DVR. You just need to be methodical.
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Old December 3rd, 2011, 07:16 PM   #3 (permalink)
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Quote:
Originally Posted by SamuelDaniel View Post
Firstly let me apologise if Ive posted this in the wrong category!

Need some advice with a cctv system that I bought from Maplins (ok,ok you can stop laughing now!).

250gb DVR with 4 cameras - All working fine , apart from one problem...

The colours are all wrong! , Grass is showing as purple , and the driveway is currently a dull green! . The actual image quality is good and workable , but the colour is like something out of a 1960's festival! Tried swapping the camera , same problem.
It's because the camera is sensitive to infrared, so it can still give an image in the dark with infrared illumination. It can screw-up colour rendering. I think the cheaper security camera systems are more prone to it though. A friend of mine also bought a cheap CCTV system from Maplin, does exactly the same thing. Regular digital cameras usually have an infrared filter, so they'll give correct colour rendering. As these are not required to do night vision.

Was reading a reading a geek type article a few years ago about hacking Quickcam webcams for infrared and night vision, which basically involved disassembling the webcam and removing the infrared filter. It worked, but then the webcam had horrible colour rendering.
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Last edited by mikedt; December 3rd, 2011 at 07:26 PM.
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Old January 3rd, 2012, 09:59 AM   #4 (permalink)
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Cheap cameras, I got a kit from Aban Technology.
Colour are great!
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