Difference Between Surveillance Camera and Webcam
The ordinary camera mentioned here mainly refers to the camera used for online chat, and the surveillance camera mainly refers to the security camera specially used for video surveillance. So what's the difference between the two？
1. Difference in Usage
First of all, ordinary cameras are mainly used for video chat, photography and other activities, corresponding to daily life. Surveillance cameras are mainly used for a series of security activities such as security inspection, real-time monitoring, investigation and evidence collection. Secondly, surveillance cameras are all remotely controlled wirelessly, while ordinary cameras are not.
2. Functional Difference
The directionality of the main object of the ordinary camera is clear, and it is generally carried out with the knowledge of the other party. Surveillance cameras are mainly used for real-time monitoring, which is generally carried out without the knowledge or semi-knowledge of the subject.
3. different configuration
In order to meet the needs of security, surveillance cameras usually have higher pixel and resolution than ordinary cameras, and some products have anti-glare, anti-vibration, and night vision functions. At the same time, the biggest advantage of surveillance cameras is that a variety of software can be installed in the background for security needs. Such as face recognition, automatic tracking, filtering system, video storage and compression functions. In short, because of special needs, surveillance cameras must be better than ordinary cameras in all aspects of configuration.
4. Difference in Use
The biggest difference between surveillance cameras and ordinary cameras is the difference in usage. In order to deal with security, surveillance cameras need to be remotely controlled to monitor targets for a long time without interruption. At the beginning of the design, it was decided that its environmental adaptability is higher than that of ordinary cameras. The lens on the surveillance camera is a semiconductor imaging device, so it has the advantages of high sensitivity, strong light resistance, small distortion, small size, long life, and anti-vibration.
In the surveillance camera security system, the image generation is currently mainly from CCD and CMOS. The main difference between CCD and CMOS in manufacturing is that CCD is integrated on semiconductor single crystal materials, while CMOS is integrated on what is called metal oxide. In terms of semiconductor materials, there is no essential difference in the working principle. Only a few CCD manufacturers such as Sony and Panasonic have mastered this technology. Moreover, the CCD manufacturing process is more complicated, and the price of the camera using CCD will be relatively expensive. In fact, after technological transformation, the gap between the actual effect of CCD and CMOS has been reduced a lot. Moreover, the manufacturing cost and power consumption of CMOS are much lower than that of CCD, so many camera manufacturers use CMOS photosensitive elements. Imaging: Under the same pixel, the imaging transparency and sharpness of the CCD are very good, and the color reproduction and exposure can be basically accurate. However, CMOS products tend to have average transparency, weak color reproduction capabilities for physical objects, and poor exposure. Due to their own physical characteristics, there is still a certain distance between the image quality of CMOS and CCD. However, due to its low price and high integration, it has been widely used in the field of surveillance cameras.
In addition, the monitoring distance, angle and anti-interference ability of surveillance cameras are higher than ordinary cameras. Customers can customize cameras with different observation angles and different observation distances according to their requirements. Whether it is windy, rainy or exposed to the sun, the monitoring can be completed. And the surveillance camera has night vision function, which can complete the surveillance work at night. In addition, two monitoring modes, black and white and color, can be selected. The black and white monitoring effect is better when there is no lighting at night or monitoring of moving objects. According to the sensitivity of the surveillance camera (that is, the influence of light brightness on monitoring), it can be divided into:
(1) Ordinary type: The illumination required for normal work is 1~3Lux
(2) Moonlight type: The illumination required for normal work is about 0.1Lux
(3) Starlight type: the illumination required for normal operation is below 0.01Lux
(4) Infrared illumination type: In principle, it can be zero illuminance, using infrared light source for imaging