If there is a probe in the room and the lights are turned off very dimly, can you photograph it?

If it is an infrared surveillance camera, it can be photographed. Infrared camera refers to the kind of camera that can be monitored 24 hours a day.

Infrared camera refers to the kind of camera that can be monitored 24 hours a day.

The working principle of the infrared camera is that the infrared light emitted by the infrared lamp irradiates the object, and the infrared light is diffused and received by the monitoring camera to form a video image.

The infrared light emitted by the infrared lamp illuminates the object, and the object is received by the monitoring camera after diffuse reflection, forming a video image. Just like lighting with a flashlight in the dark, a flashlight is equivalent to infrared rays, and a camera is equivalent to human eyes. The reason is the same.

Features:

1, sensitive to temperature, can form an image according to the temperature, can quantitatively identify the temperature data, and can customize the temperature alarm limit by users.

Not only infrared forest temperature image display, but also temperature data display and abnormal temperature alarm signal output.

2. When an alarm occurs, the alarm is triggered to generate an alarm trigger signal, which is transmitted to the background equipment through the RS232/485 port.

3. It can completely penetrate the dense smoke and partially attenuate the dense fog.

4. No visible light is needed, and the image definition at night is even higher than that during the day.

5, fast response, 50HZ image output per second.

6. When the monitoring area is large and the infrared thermal image monitoring head works, passively detect the infrared thermal radiation of all targets in the picture. It has 76,800 detector units.

Compared with infrared cameras, white-light surveillance cameras have the following disadvantages:

1, white light fill lamp belongs to visible light, which is low in concealment and not suitable for covert monitoring.

2. Because the light of the white camera is visible, the director has a great influence, so the bulb decays for a period of time, which is easier to reduce the night vision effect than the infrared lamp.

3. In terms of price, the market price of white cameras is generally about 10% higher than that of infrared cameras.

How to judge whether the infrared light of the surveillance camera is good or bad;

Infrared lamp is actually a light-emitting diode, which can make the monitoring at night clearer, so the brighter the infrared lamp, the better. The more infrared lamp, the better.

Under normal circumstances, the infrared lamp power of remote monitoring is slightly higher, and the infrared lamp power of close monitoring is slightly lower.

How to monitor the glare of backlight;

First, the camera should try to avoid direct sunlight.

It may be a good choice to adjust the installation position of the entrance camera and flip it.

For example, a camera needs to be installed at the door of a certain outlet to monitor people entering and leaving. When the camera is installed at the entrance and exit, it may encounter serious backlight phenomenon, resulting in a black screen of the monitoring screen.

At this point, if we turn the camera upside down and aim the camera at people who walk out of the network, the monitoring screen will avoid the direct sunlight and solve the problem of backlight.

Second, choose a camera with improved backlight function.

Among the types of security cameras, there are two kinds of cameras that can solve the backlight problem, the camera with backlight compensation function and the wide dynamic camera. Backlight compensation can divide the picture into several different areas, and each area is exposed separately.

When the picture is dark and layered, backlight compensation is introduced to make the main picture on the monitor clear, reduce the subjective brightness difference between the background picture and the main picture and improve the visibility of the whole scene.

The wide dynamic camera can be exposed twice at the same time, and the bright and dark objects on the screen can be seen at the same time after synthesis. Compared with backlight compensation, wide dynamic technology is better.

Third, improve the illumination of indoor light sources.

The reason for the backlight phenomenon is that the contrast between the light intensities in the monitoring range is too large, so the contrast between the black and white levels of the formed image becomes stronger.

If the illumination of indoor light source is improved, the indoor light is enhanced and the contrast between indoor light and external light is reduced, the backlight phenomenon can be improved.