Folding Electric Mobility Scooters Welcome to our product category dedicated to folding electric mobility scooters, the ultimate solution for individuals seeking convenience, portability, and freedom. At our company, we specialize in designing and manufacturing innovative medical devices, and our folding electric mobility scooters are specifically crafted to provide a compact and reliable means of transportation for individuals with limited mobility. With their advanced features and collapsible designs, our scooters offer unparalleled flexibility and ease of use. Ningbo Baichen Medical Devices CO.,ltd , https://www.bcmobilityscooter.com
High-definition camera performance recognition With the advent of high-definition security market, there are more and more high-definition products on the market, the user's choice is more and more, although many choices are good things, users can shop around. However, with the increase in the number of products, these products will inevitably have some quality, but the performance can not meet the user's expectations of the product, coupled with a lot of users for HD products is not particularly understanding, easy to choose when Errors, or be fooled by businesses, lead to high-definition products purchased by users that do not achieve the expected results. As an important member of high-definition products, high-definition cameras often do not know from what aspects to determine its performance when the user chooses, I believe that the determination of high-definition camera performance mainly from the following aspects to consider:
First of all, when users select high-definition cameras, they must understand their own needs. High-definition cameras are mainly used in the monitoring of financial systems and road traffic because these places have special requirements for images. If users use the sites, they can not see the faces. Features, license plate numbers, etc., there is no need to select a high-definition camera, select an ordinary camera is completely fine, after all, high-definition camera in the price than the ordinary high, so that when the choice of the first to clear their needs.
The second is the function of the camera, which is mainly reflected in the clarity of the picture. When watching the picture, the main observation is static resolution, dynamic resolution, color reproduction degree, and there is the scenery, scenery, flowers, moving objects. When you see the picture is clean, the color is natural and realistic. The sharpness of the picture is not only to see the horizontal resolution, but also depends on its wide dynamics, automatic white balance, image sharpness adjustment, super digital noise reduction, intelligent digital automatic photometric compensation and other functions. When detecting the wide dynamic function, it is necessary to observe whether the transition between the bright area and the dark area is clear and natural, and whether the wide dynamic range can be automatically adjusted. Good cameras have rich levels and delicate performance in bright and dark areas. When looking at license plates under nighttime headlights, the outline of the headlights, filaments, and license plates are all very clear, and no bright lines appear. The low illumination needs to observe whether the camera's monitoring picture is clear at night or not, and how the noise size affects the function of the camera.
The third is some other aspects of the camera, such as the camera's operating settings, the current set of high-definition cameras is mainly through the menu and dialing two ways to adjust, with the menu of the camera should pay attention to whether the menu function is rich, whether Easy to adjust, can meet different complex monitoring environments. In addition, some cameras have different modes. When users use them, they only need to choose according to different environments. It also depends on whether the camera's data interface is rich, because in the process of use, there will be a phenomenon that the surveillance camera cannot work properly due to environmental or human damage. In the installation and debugging also pay attention to lens matching, because the quality of the lens is not good, or the matching is not good, to a large extent will affect the clarity of the picture. It is also necessary to pay attention to the accessory products of the camera. In order to achieve high-definition effects, the transmission system, the intermediate system and the terminal display system must meet the requirements of bandwidth and compression in addition to the high-definition camera at the front end. The last step is to look at the technical support of the camera manufacturers, including whether they can provide specialized technical training, explain in detail the special features and operating menus of products, and whether maintenance can be carried out in the shortest possible time after a problem occurs.
High-definition camera technology to buy points then, the real 'high definition' image quality, in addition to high resolution, but also to examine what aspects? This article from the perspective of engineering applications, and focus on practicality, analysis of how in security monitoring project Buy HD video camera.
First, to investigate the calorific value of an ordinary million camera fever, mainly due to DSP, heat, it is inevitable that stability is worrying. Especially at the hot sun in the hot summer sun, more worrying.
It is worth mentioning that the original bolt firing is very hot, if you continue to add infrared light in front of the bolt, it is not hot to heat it? And most of the current million HD cameras are high-illumination million HD cameras, not low illumination , Ordinary millions of HD camcorders usually have a low illumination of 2-10 LUX. This camera not only has weak visible light, but also weak infrared light. Therefore, if you want to use an ordinary million HD camcorder to make infrared light, the number of infrared lamps must be high. Several times more than the low-illuminance infrared machine, or the amplification of current, so that the infrared light becomes brighter, but the life of the infrared light to do so is worrying.
Having said this, we will know that if you choose a million HD video camera, you must test the heat of the machine to understand what DSP they are using. How does the power consumption heat up? In addition, we may also understand why there are many million HD manufacturers, but there are very few manufacturers that can provide and sell millions of infrared HD cameras in bulk. The reason is this way.
Second, the inspection delay as long as it is a digital camera, have different degrees of delay, the same 720P HD picture, some camera delay is only 0.1 seconds, while others are as high as 0.4 seconds, 0.7 seconds, knowing that higher, said Here, the project's friends may wonder why the same resolution has different delays because the digital camera needs to go through three processes, compressing, transmitting, and decompressing the display. If a manufacturer is completely dependent on a solution provider or lacks its own compression algorithm development capabilities and core underlying technology capabilities, it will lag behind others in image compression, network transmission, and decompression of software efficiency.
Delay is a very important parameter, otherwise it is very troublesome in PTZ control, and the delay also reflects the development strength of a software, and the stability of the product. If you think about it, if all the way to monitor video processing is so tired, how can you develop hundreds of thousands of digital HD monitors?
Third, the investigation of low illumination Everyone should know that security industry surveillance and consumer digital cameras and traffic monitoring are not the same, it is impossible to keep flashing when the light is dark. Therefore, there is no low-lightness feature for millions of HD, and applications are extremely limited. When the light is dark, it becomes blind. Pixels are no use high. In particular, civilian monitoring has a higher requirement for low illumination and is even more complex than the monitoring environment of some high-end surveillance projects. Such as bank monitoring, 24-hour monitoring under strong lights, the conditions are very suitable.
Fourth, to examine the trailing part This part was originally intended to be talked about with low illumination, and then thought about it because the trailing phenomenon is the most common malpractice of the HD camcorder. Therefore, it was put forward for discussion separately. We have already discussed in the discussion above. The importance of low illumination, but some security manufacturers use electronic slow gates or frame accumulation in order to improve low illumination, this will definitely greatly enhance the effect of low illumination, but the drawbacks are also very obvious, when there are moving objects on the screen. At that time, you will find out how a person walks with a ghost (tail), which leads to the inability to see clearly the moving objects (cannot see the characteristics of the person in action), and when the moving objects are blurred. When the object is still, you can see clearly.
V. Inspecting infrared infrared cameras, is not adding an infrared light in ordinary machines? Too simple. Haha, many people say this, this argument seems to have a little reason, really so simple? No! If it is so simple, why the market can sell millions of high-definition infrared machine is very little? In fact, infrared high-definition, in addition to me There are still many details to be dealt with in the analysis of those stated in 1).
VI. Inspecting Prices A manufacturer can easily raise the price, but it is difficult to lower the price. It may be difficult for everyone to say that this is not always the case for the price war. Yes, but which company have you seen? In price wars, can analog cameras do 30 yuan/support? No one, why? Because no one can control the cost so low, even if it is cutting corners and reduce the cost of up to about 10%. Everyone thinks that the performance of computers and CPUs was poor and expensive. Why is the performance of computers and CPUs today still very cheap?
Remind everyone, don't forget the magical power of technology. Scientists and R&D engineers are not only constantly improving the quality of their products, but also constantly reducing the cost of the product. Otherwise, the priority technology products can only be used in small areas forever, or forever in trials. In the room, it is difficult to benefit humanity and benefit the society. You can lower the price and you may be able to cut corners, but if you can drop the price, it's a high technology. Of course, manufacturers will also be based on market positioning, the user rarely used the function, not on the ordinary machine, and put in high-end machines.
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Today 'HD' has become a hot term in the security industry, but there are no specific standards. Most engineering companies and users only use high resolution to determine whether they are HD cameras. In fact, high resolution is a necessary condition for 'HD', but it is not a sufficient condition. High resolution can only be said to be similar to static 'HD'.