Which IP camera to choose for high-quality day and night shooting?

Question

Video

Please tell me which IP camera and DVR to choose for high-quality day and night shooting? It is necessary that from a distance of 20-30 meters you can easily read the car number. Should I look towards multi-pixel cameras? For example, 5 or 8 megapixels?
The situation is such that it is necessary to monitor a certain territory in winter and summer, day and night, and see which cars with which numbers enter the territory. It is necessary that the car numbers are easy to read both with and without zoom.
The camera can be varifocal with a motorized drive (focus). The main thing is that the horizontal and vertical viewing angles are good. And the detail was good.
And what is the best DVR for this purpose to take? The video history should be kept for about half a month.
Thanks in advance!

Answer 1

Be sure to take a camcorder with night mode and WDR (the more dB the better). Preferably a camera with ARD. As for readability, there should be 80-120 pixels per number. Also pay attention to the sensitivity parameter, the less illumination is required for the camera, the better.
Although not enough data, I can assume that it is easier and cheaper to install several cameras. For example 1 is focused on the entrance to the territory and sees the number in close-up. 2 overview (sees the entire site). 3 Rotary with variable focus so that the guard could focus the camera on an important area ...
If you want to assemble the system on a DVR, then take the cameras offered by this vendor or distributor.
The depth of storage will depend on the number of cameras, on the intensity of traffic, on the resolution of the cameras. When you decide on the cameras, it will be easy to calculate the volume of the hard drive.

Answer 2

It is necessary that from a distance of 20-30 meters you can easily read the car number.

The backlight built into the camera is a disservice in the case of license plates. The overall light level is low, and the numbers will be overexposed (just a solid bright spot instead of a number). Whichever camera you choose, forcibly turn off the backlight in the settings. Lighting should be a separate spotlight, placed away from the camera (if the spotlight is next to the camera, it will be the same garbage as with built-in lighting); ideally - several spotlights from different places.

Should I look towards multi-pixel cameras? For example, 5 or 8 megapixels?

Yes.

The video history should be kept for about half a month.

It depends on the number and resolution of the cameras, and the size of the hard drive. In some registrars, you can put more than one disk (indicated in the specifications).

Answer 3

For your task I would use 2 different cameras. One is just to look at the rooms, the other is an overview of the territory. It will be cheaper than buying a super camera with a huge 8MP sensor and recording a 60fps stream from it. Even in this case, we will get a good readability of the number only when the car is stopped. 2 cameras with 1/2.5" matrices at 2-4MP and fixed lenses (5500 rubles in retail for Hikvision) with the right angles will solve the problem.