Dead Pixels on Analog CCTV Camera

[Hakan Ozturk 0]

Hello,

 

in one of our projects, during test&commissionig period, consultants make us to change some of our cameras with the new ones because of just one dead pixel on 10 nos of cameras.

 

I have been searching international regulations but i would kindly ask you to help me find out a way that one dead pixel could be acceptable for handover.

 

Kind Regards

Hakan

[the toss 0]

I would like to know how they determined there was one dead pixel

[ak357 0]

I would like to know how they determined there was one dead pixel

 

Hmm, may be put cam against white paper

set for D1 or whatever avail

record,export, zoom in and have a look

[MaxIcon 0]

This should be covered in the contract agreement, which should specify the number of dead pixels that are acceptable. This is standard with laptops, monitors, etc - each vendor specifies how many dead pixels and what the status of them is before qualifying for replacement.

 

Here's Dell's LCD policy as an example:

http://support.dell.com/support/topics/global.aspx/support/kcs/document?docid=414288

 

Otherwise, it's a matter of how happy you want to make the customers and at what cost.

 

For finding dead pixels, you want to look at a solid white image and a solid black image. For white, I usually point it at a light bulb at a slow exposure; for black, I just cover the lens. Some pixels will be stuck one color, others will be dead. Bright pixels are usually more annoying than dark ones.

 

Note that dust on the sensor or lens can look like a dead pixel. If it's on the lens, rotating it will move the spot. If it's on the sensor, a blast of canned air will generally move it around.

 

Personally, I find that a few dead pixels really don't matter in a real world application, and I just ignore them once I find I can't clean them off.