Photosensitivity determines the degree of reaction of the matrix to illumination indoors or outdoors. A high-sensitivity sensor requires less light to produce high image quality.
Black and white contrast vision is sometimes better than color. Therefore, at night, the camera automatically switches to black-and-white mode. At the same time, IR illumination can be turned on so that the resulting image is even with higher quality. Even in complete darkness, such cameras remain effective.
To measure the illumination using the value of Lux.Examples of illumination values:
Moonless night: 0.01 lux
Moonlit Night: (1/4 of the Moon): 0.05 lux
Starlight Night: 0.003-0.1 lux
At night on the street with the full moon: 0.3-0.1 lux
Deep Twilight: 1 lux
The auditorium in the theater: 3-5 lx
Twilight and illuminated highway at night: 10 lx
Warehouses: 75-30 lux
Offices: 50-500 lux
Hotel halls: 100-200 lx
Shops and supermarkets: 1500-750 lux
Daylight on the street in cloudy weather: about 5,000 lux
Daylight on the street in sunny weather: 100000-5000 lux
The ability to "see" the camera, in the description of its properties by the manufacturer, implies a minimum level of illumination of the studied object or subject. However, high image quality is not guaranteed. Therefore, according to the photosensitivity parameter, you should (when choosing) choose a camera that will exceed the illumination level of the investigated object several times.What is the difference between an IP CCTV camera and an analog one?Why switch from analog video surveillance to IP video cameras?What is a camera lens?How to get sound along with video from surveillance cameras?What are CMOS and CCD?What is camera resolution?The concept of "day / night."What is the photosensitivity of a matrix?What is matrix size?What compression formats do IP cameras use?What is H.264?How are IP cameras powered?What is an IP address?How to connect an IP video camera to a computer?How to connect an IP camera to a local network?How to connect to the IP camera via the Internet?What is AHD technology?What are the benefits of AHD technology?What is a multi-format camera?