Image Sensor

An image sensor or imager is a sensor that detects and conveys information
used to make an image.

The most important optical element in the camera is the imaging chip,
which is divided into two categories,one is CCD, and the other is CMOS.

What is the difference between the two camera chips?
Type1 CCD
The early cameras were mainly based on CCDs, analog signals, which were sensitive to light, so the colors were more realistic, but not sharp. Therefore, the resolution of CCD images was not high.

In addition, the analog signal needs to be transmitted through the coaxial cable. The bandwidth of the coaxial cable is not high, so the CCD camera has a better response in the night vision function, but it is not clear enough.

Because it is sensitive to light, the relative imaging speed is also fast, so CCD can be used to shoot high-speed objects.

Type2 CMOS
In recent years, with the development of science and technology, many cameras, digital cameras, and mobile phone cameras all use CMOS as imaging components.

Because the CMOS chip is not sensitive to light, the imaging speed is slow, but the shooting of the object is very clear.
Mobile phones already have an imaging resolution of more than 10 million pixels.

The advanced monocular has also reached more than 20 million pixels,
The cameras used in the surveillance system have a minimum resolution of 1 million pixels and a maximum resolution of more than 5 million pixels.

The imaging is delicate, the contrast is clear, and the color is bright, but the imaging speed is slow,
And because of the high resolution, each imaged file is very large, so it needs to be transmitted in a high-bandwidth way.

In conclusion
Almost all digital cameras in surveillance systems use CMOS as imaging components.