Attention to detail makes surveillance camera products “virtual” nowhere

There are many factors that affect the HD effect. Different CCD/CMOS sensors and DSP processing chips are different. Infrared and wide dynamic technologies can not keep up, which may cause slight changes in the image. In the absence of contrast, it is also difficult for the user to judge through the naked eye whether the machine has any problems. "Void" is the "hidden rule" in surveillance camera products. Is the actual effect really achieved? Maybe we can tell the truth from the details.

Although high-definition surveillance is not a patent in the high-end areas, the application of high-definition products in the civilian market has not yet reached an ideal extreme. Therefore, we may take the financial sector as an example to take a look at this matter of high-definition surveillance. First, for monitoring systems, analog monitoring still occupies the mainstream of the industry; secondly, in order to further promote high-definition monitoring, some outlets and bank branches establish high-definition sites in some areas.

For the transformation of analog to high-definition, the third step need to do is to improve the clarity of the image; again, is based on the actual surrounding environment, to strengthen a certain area (such as wide dynamic, infrared night vision) technology; Finally, if you really want to do high-definition promotion, then you have to solve the problem of transmission and storage. Today, let's take a look and see which technologies can improve image quality in the first place after upgrading.



Details determine success or failure: HD monitoring license plate recognition in traffic

Infrared lamp and wide dynamic technology upgrade

For night vision surveillance, the role of infrared light can not be overlooked. However, in a confined and confined space, the concentrated light-emission and heating of the infrared lamp will bring certain damage to the monitoring camera itself; the imaging whiteness and the life of the infrared lamp are all very troublesome issues. In order to achieve high-definition picture quality, the manufacturer's product specification parameters must be the same as the actual test results. For the difference in indoor and outdoor environments, the combination of fixed focus and zoom should be adopted so as to meet the requirements in different environments. The service life of the infrared lamp must be guaranteed at least for 5 years. With the passage of time, the infrared distance can be allowed to attenuate slightly, or it can be remedied by external methods.

In addition to infrared lights under night vision, wide dynamic technology is a must-see factor. Once the background is "exposure" and the wide dynamics technology is turned on, the strong light can be suppressed and the facial features in front of the camera can be highlighted. For wide dynamic technology, the wider the dynamic range, the better the imaging effect.

HD surveillance to see the details: the enlarged image

For high-definition images, in addition to the rigid standards of 1080p, many areas have additional requirements. For example, the road monitoring requires to see the license plate information, the bank monitoring must see the facial features of the suspicious persons, the interrogation monitoring should clearly see the suspect's standard definition, and it can tell whether they are lying or not. Whether it is real-time monitoring or playback, details determine success or failure.

From the above figure, it is not difficult to see that in different network environments, different compression methods play a decisive role in the details of the picture quality. Perhaps the source picture has only slight changes, but when the camera is continuously enlarged. Comparing strengths and weaknesses, it's natural to be clear.

For high-definition surveillance, don’t just listen to those metrics that businesses in the store tell you. No one can write a value, but the actual effect of monitoring is not "written". It is implemented by multiple hardware device software technologies. Finding high-definition surveillance details in between drops, through constant testing to find the most realistic HD surveillance. Let the rules break the "hidden rules" paradox and use strength to prove that the surveillance product is no longer a dummy.