Hikvision iDS-2CD7A46G0/P-IZHS(Y) ANPR

[zzoran]

Does this camera provide good image quality when used for surveillance and identification of people?
The information that can be found on the Internet is always related to reading license plates on cars.
I read the technical specifications and they are excellent -- 4 mp, sensor 1/1.8, sensitivity 0.0005 ... everything is OK.Is there some hidden disadvantage in image quality if used without zoom (2.8mm) or is the only problem the cost of acquiring the camera?
I want to buy this camera and use it for a while for video surveillance of the yard and later switch it to recording car license plates.

 

[wittaj]

Pretty much the only difference between this and another camera is this camera can automatically read and log plates.

So if you don't set the shutter speeds to read plates, then yeah you could use it for other purposes, but it is underutilizing the capabilities of the camera.

You would have to set the camera up specifically to read plates. You need the proper camera with OPTICAL zoom for the distance you are covering and the angle to get plates.

Regarding plates, keep in mind that this is a camera dedicated to plates and not an overview camera also. It is as much an art as it is a science. You will need two cameras. For LPR we need to OPTICALLY zoom in tight to make the plate as large as possible. For most of us, all you see is the not much more than a vehicle in the entire frame. Now maybe in the right location during the day it might be able to see some other things, but not at night.

At night, we have to run a very fast shutter speed (1/2,000) and in B/W with IR and the image will be black. All you will see are head/tail lights and the plate. Some people can get away with color if they have enough street lights, but most of us cannot. Here is a representative sample of plates I get at night of vehicles.

See the LPR subforum for more details.

 

[zzoran]

Ok.I'm interested in daily use for monitoring. Do it get excellent image quality day and night.
Do I get better image quality compared to mid-range camera models -- 2387G3 /2347G3--/G2.
There is no information on the Internet about the image quality of the monitoring mode.
Just watching people and the back yard.
For now, I am not interested in recording the plates.

 

[wittaj]

It all comes down to MP/sensor ratio and what your settings are.

If those are 4MP on the 1/1.8" sensor then overview quality would be similar.

But you will lose Overview once you set it up to read platesndue to the faster shutter.

 

[zzoran]

In the technical documentation it says-- P-iris , Blue glass module,sensitivity 0.0005.....
How much can these differences affect the better image quality compared to other cameras that do not have these capabilities?

 

[wittaj]

Many do not pay attention to the minimum illumination specs...because those are under ideal situations with so many factors not known.

Almost every camera will say 0 LUX with infrared or white LED on, and we all know how poorly Reolinks perform at night in low light yet that is their spec....or even two different good cameras. Take for example the 5442 4MP2.8mm fixed lens camera will beat the socks off the 5241 2MP 2.8mm fixed lens or a Reolink and they both say 0 Lux with IR on.

Heck darn near every camera will say 0 LUX with IR on....

Once upon a time manufacturers would at least say at what shutter speed that rating was based on. Most would say a 1/3 shutter. That is way to slow for anything. You need to run minimum 1/60 shutter to start to minimize blur.

But now they don't even provide that, so in most cases it is a wide open iris, slowest shutter the camera allows, and gain and brightness cranked to 100 so that they can get the lowest illumination number possible.

But nobody would run the camera in that configuration.

Some of the older cameras would give these kind of specs so you knew how the camera was setup to come up with the minimum illumination.

0.002Lux/F1.5 ( Color,1/3s,30IRE)
0.020Lux/F1.5 ( Color,1/30s,30IRE)
0Lux/F1.5 (IR on)

So of course, the faster the shutter, the more light that is needed, and thus the LUX needed is more. It would be nice if they still provided it in this manner.

To minimize blur with motion, you need to run a shutter at at least 1/60 shutter - once you start doing that, the LUX specs are out the window.

But as more competition came out, manufacturers started playing games and tweaking the settings for getting the lowest lux possible, but that came at a cost of a configuration nobody would use. So they wouldn't say how the camera was configured to capture that minimum illumination rating.

They play these marketing games to make it look like the camera is better than it is for someone that is just chasing minimum illumination numbers. Kind of like how we rarely get the miles per gallon a car is rated for.

It is a tool, but I would prefer to see the reviews here with settings provided and make an educated guess as to if my light is more or less than the reviewer.