What's the difference between a camera on a computer and a surveillance camera?

The difference between computer camera and surveillance camera

At present, there are basically two kinds of cameras on the market: one is a digital camera, which can be used independently by a microcomputer, which is relatively simple and belongs to the household level. The other is analog camera, which should be used with video capture card. It has a loaded processing circuit and belongs to industrial grade.

Digital camera: Digital camera is a kind of digital video input equipment, which uses photoelectric technology to collect images, instead of using analog acquisition tools to collect images first, and then completing the image input through special analog-to-digital conversion components such as video acquisition card. The advantage of digital camera is that it is easy to use, generally connected by microcomputer parallel port or USB, plug and play, and easy to install. Especially suitable for portable computers and branded desktop computers that can't open the chassis. The overall price is often cheaper than buying cameras and snap cards of the same grade.

However, the shortcomings of digital cameras are also obvious, because CMOS is used as a photosensitive device, which makes it difficult to use digital cameras.

The capture speed above 640*480 is not very fast (less than 30 frames). At present, the resolution of most cameras on the market is around 640x480, and 352x288 can reach 30 frames per second.

Frame. The price of digital cameras is also relatively cheap, generally positioned below 1000 yuan, which is acceptable to the public. Ordinary home users can consider buying digital cameras.

Analog cameras: analog cameras are mostly CCD cameras, and the resolution is different according to different grades. For example, analog cameras of the same level as digital cameras are generally used for industrial purposes with high resolution, good real-time performance and low resolution. Analog cameras need video capture cards or external capture cards to work with computers. Video capture cards are large in scale, ranging from 600 yuan to 1 10,000 yuan. Expensive video capture cards often have real-time video compression function, which is suitable for professionals.

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