Subscriber Discussion

Strange Effect On CCTV Video - What Is The Cause?

RW
Rukmini Wilson
Apr 20, 2014

It seems where the picture gets overexposed instead of being white it goes black. Or is something else happening? Warning: Brutal karate kick inside!

U
Undisclosed #1
Apr 20, 2014

It's over-exposure compensation. I've seen several cameras do that where a really bright area actually gets displayed as black pixels.

RH
Richard Handy
Apr 20, 2014

Do they do that on purpose? To make it more contrasting maybe?

Avatar
Vincent Tong
Apr 21, 2014

It seems that the cameras have HLC (High Light Compensation) on in the camera. That is why you see the really bright areas , especially the whites get blackend out.

RW
Rukmini Wilson
Apr 21, 2014

Is that a generic term, HLC, or specific to a manufacturer? Is it designed really just as a 'clip indicator' (like the red of a audio VU meter) and so you should never see more than just a small amount of blackening, or is the way the video clip looks typical?

Avatar
Vincent Tong
Apr 21, 2014

No that is pretty generic among camera features. You would see it more pronounced when looking at something like car headlights at night.

JH
John Honovich
Apr 21, 2014
IPVM

Thanks Vincent!

Here's a marketing demo video that shows highlight compensation in action:

New discussion

Ask questions and get answers to your physical security questions from IPVM team members and fellow subscribers.

Newest discussions