Dimensioning Mega Pixel Cameras

Recently we were invited to participate in a competition to supply and install a CCTV system for a large private company.
This client had contracted a CCTV project from a company specialized in security systems and when requesting this project the client said that he would like to have a top system, after all he was suffering with his analog system, cameras with a maximum of 420 lines, very little time storage, etc.
When we got the project, we saw that it included a few hundred Full HD cameras.So far so good, but analyzing the project we started to think that it would not be necessary to use 2Mp cameras depending on the size of the environments where these cameras were allocated, so we suggest the client to use HD cameras instead of Full HD.
Guess what was the first question the customer asked us!
– Are Full HD cameras no better than HD cameras?
And now?What would you say to him?
Well … I think the best answer is, “It depends.”
Yes, it depends on the camera attribute we are taking into consideration to evaluate which one is better, for example:
Which one has the best resolution?A .:The FULL HD camera
Which one has the best price?R .:the HD camera
Which one consumes less bandwidth?R .:the HD camera
One question that I think is very important when considering the resolution of the cameras is to know exactly the application, the need of the client and the size of the area to be covered by this camera.It is not because the client asked for the best that we will fill the environment of Full HD cameras, otherwise, by this line of reasoning the next project that this client requests we would have to use cameras with 20Mp.
If it were to put a camera in an elevator, would you indicate a 2Mp camera?
Some will say yes, that with a camera of this will be possible to see what time the clock is ticking on the passenger’s wrist and with a 1Mp camera would give to see the clock, but the time that it is marking would be more difficult.
So I ask, do we need this?Is that level of detail necessary?Is this what the customer expects?
We have to take into account that the 2Mp camera costs almost double that of 1Mp, that the network consumption and disk space for image storage should be double in projects with cameras of 2Mp than in projects with those of 1Mp and depending on the application it is much better to use an HD camera than a Full HD, as an example, some video analysis systems work much more efficiently on lower resolution images because the processing will be faster which will allow us to analyze more frames per second, offering a faster response.
Well … In short, we redesigned the project and most of the cameras (95%) were replaced with 1Mp cameras, the necessary storage went from 200Tb to 100Tb, the network that needed a minimum band of 700Mb, needed 350Mb and the cost of the project fell from 2 million to 1.2 million.
I think this is the commitment we should have with our customers, offer what is best for their need, finding the best cost-benefit ratio.

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