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Black Lines In Cctv Image

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Has anybody come across black or dark lines between light and dark colours in a cctv image? Looking at a row of houses it looks like a childs colouring book with thin black lines outlining the doors and windows etc. Its a 650 TVL IR eyeball camera with 1/3" sony effio chip. Any ideas please?

Can you upload an image

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Sharpness turned too high or hlc turned on?

Without seeing the picture I'd say that's a good shout.

I'd go with the same, do they disappear when the sun goes in, bright light removed.

I really can't be ar**** with it anymore.

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