Infrared camera goes to network HD

The development direction of video surveillance lies in the outdoor, and the development direction of outdoor surveillance lies in night vision, and the development direction of night vision lies in infrared technology. This trend is more and more obvious. In the field of infrared night vision, Chinese companies have taken the lead in the world, and some advanced technologies have made foreign counterparts far behind. The demand for night surveillance drives the infrared camera market. At the same time, the development of night vision surveillance technology needs to be improved. In the future, infrared cameras will move toward high-definition network development.

Infrared camera features obvious infrared technology in combination with the camera there are several aspects, the first is the close-up monitoring. For the customer's requirements, the product can achieve their purpose. However, this model can't do long distances. Sony's CCD can be used within 100 meters, but it must be added to the infrared camera 100 meters away. Because this is basically the same position as it is imaged, the imaging is basically clear. If you are more than 50 meters away, there will certainly be some distance from the fixed focus. Now with the gun camera and infrared camera, you can guarantee the image quality clarity. More than 100 meters, because of the wavelength problem, the imaging position will be very different. And one machine is 40 meters CCD, the amount of light has a certain limit. When you are over 100 meters, the customer uses an infrared light to refocus once at night to ensure clarity.

In the market today, low-light cameras and infrared cameras are generally popular. Because there have been many cameras in the past decade, I personally understand that the current low-light cameras can be said that there has been little development. Infrared cameras, infrared technology is playing a big role. Low-light camera has certain limitations. Due to the light, the outdoor environment, the lack of illumination can not capture a clear image, so the installation of infrared illuminators, the market has appeared on the infrared machine. Although this image is not very good, everyone can make do with it. One of its biggest flaws is that it does not solve the problem of hazy light. Everyone will see a very white picture when using an infrared all-in-one machine at night. That is the haze. Infrared technology combined with the development of the camera, affirmed the integration of infrared technology and cameras, the emergence of infrared one machine on the market, it is precisely this performance, the author believes that in the future, low illumination may be combined with infrared technology to achieve better night monitoring.

The need for night surveillance drives the need for night surveillance in the infrared camera market and determines the direction of development of the monitoring technology. For this technical analysis, we discuss four situations. The first is the basic part of the high-sensitivity CCD and low-illumination functions. Infrared lighting plus black-and-white cameras are not currently available for Sony China; the third is direct infrared cameras; the fourth is higher-end cameras such as image-enhanced CCDs or electron multiplier CCDs. One of the most direct features is that the sensitivity has to be greatly improved relative to other cameras, for example, a thousand times or a few thousand times, but the cost will be greatly increased.

In the field of surveillance, there are many places in the country that require 24-hour day and night surveillance. Therefore, infrared cameras, including infrared night-time low-light cameras, are widely used. This is a trend. For infrared cameras, I think this is also the case, and the market situation will get better and better. At the beginning of its entry, the infrared market was still using low-light and infrared cameras. This is our starting point. Began to think that the infrared lamp installation problem is a big problem. With the advent of market demand, more than 95% of the cases occurred at night, which is an international statistic. Therefore, nighttime monitoring is more important than daytime monitoring. Therefore, real monitoring and nighttime monitoring are the most important factors. Lighting in big cities like Beijing is sufficient, and imaging resolution is even better than that of foreign countries. But most cities in China are dark after 12 o'clock, so the application of infrared lamps is inevitable.

Infrared lighting installation is a big problem. Industry insiders said that entering this market infrared one machine is on the market, and developed to today's very fast, because of its cheapness, convenience, the current market is unparalleled, of course, Sony CCD in terms of demand is very large, and now is your CCD Breaking the market, the market for China should be very large.

For the infrared one machine has been developed to a stage, the current price and other aspects are very good, but there is a big problem, that is, imaging is not clear. Because the wavelength of infrared is totally different from the wavelength of visible light, I have seen infrared lamps from many homes produced abroad. All imaging is unqualified and cannot pass national standards. So put forward higher requirements for the infrared camera. For us, the infrared effect is not only the infrared light, but also the photosensitive wavelength of the camera chip. The clear range is not the same in the clear range of visible light and infrared.

Infrared night vision surveillance technology needs to be improved to look at the sky and the sea. So many infrared lamp manufacturers swear by themselves that their infrared light irradiation distance is 100 meters or 200 meters, etc., and also invented the term “foot meters”. It is misleading for the contractor that the infrared lamp does have a fixed exposure distance. Regardless of how the manufacturers advertise, the contractor is unbelieving and believes that a nominal 100 meters infrared lamp can barely use 50 meters. A lot of responsible engineering companies, but also bought numerous infrared lamps can not meet the requirements of users, it is really bitter words.

So, does infrared light have a fixed illumination distance? Infrared night vision surveillance only involves infrared light technology? Numerous facts prove that the answer is no. In fact, as far as any infrared lamp is concerned, there is absolutely no fixed irradiation distance. Any practice of marking the irradiation distance of an infrared lamp in isolation is very unscientific. There are also fairly professional people and manufacturers who have come to realize that in order to achieve the desired effect of infrared lighting, they need excellent cameras and infrared lenses with excellent performance. The most commonly heard argument is that it requires an infrared-sensing camera of 0.001 Lux or more, preferably black and white; it requires a special infrared lens, and its infrared transmittance reaches more than 95 percent. The problem is that any professional engaged in optical research and manufacturing knows that these so-called lenses with an infrared transmission rate of more than 95 percent really need to achieve more than 95 percent of infrared transmission. The rate is more difficult.

The development of the future towards the network HD network security, high-definition, intelligent has become an inevitable trend in the industry, the transformation of the product system architecture prompted the infrared camera also need to be upgraded accordingly, infrared camera network, high-definition also gradually Become a trend in the selection of industry applications. Infrared cameras with networked and high-definition features can greatly facilitate the application of infrared cameras. On the one hand, it is reflected in the network to make the deployment of infrared cameras more convenient, and the networked applications also mean higher added value. Can realize the intelligent application; On the other hand, it is reflected in the high-definition that makes the infrared camera to monitor images more clearly at night, and has better detail expression.

For example, in the all-weather monitoring of large-scale factory areas, the entire infrared monitoring system adopts the standard TCP/IP protocol and can operate directly on the enterprise LAN. The monitoring center only needs to install the image monitoring system server and collaborate with the corresponding database to complete the on-site image reception, coordination of control signals, real-time image monitoring, user login management, video storage, retrieval, playback, backup, recovery, etc. The enterprise monitoring center can not only monitor the headquarters but also remotely and centrally monitor the branches and factories. Only the ADSL, optical fiber, telecommunication line or wireless network connection is used between branches, plant sites, and head office. Let the company not need to send more manpower to carry out 24-hour human observation on each monitoring point, and only need a small amount of personnel to be in the monitoring center.

However, although the visual experience brought by high-definition is analog products can not be compared, but at the same time we also have to realize the sensitivity problem of its core SENSOR: when the same pixel under the same area, the CMOS photosensitive area is relatively lower than the CCD, The CMOS low light effect is relatively poor compared to the CCD. Moreover, the CMOS amplifier has a different magnification, which causes excessive image noise at night and affects the night image effect. Therefore, an infrared camera using the CCD as a light sensing element in the same pixel is more effective than the CMOS. It will be better for capturing image clarity and low illumination. However, the reality is that most HD network cameras use CMOS sensors, which creates contradictions between the actual application and the ideal effect. Therefore, if we want to achieve a full-scale infrared high-definition surveillance, how to solve the problem of large noise in the night video, video snowflakes and other issues is the key.

In fact, in the current development of monitoring technologies, CMOS sensors are rapidly developing, and their noise signals are further reduced. Star-level CMOS sensors have also been introduced. Infrared cameras require low power consumption, high integration, small size, networking, and high-definition. The CMOS sensor is undoubtedly the focus of choice for the future. Furthermore, the performance of DSP chips equipped with CMOS is increasingly enhanced, which makes the video signal processing technology can most effectively reduce the gain amplitude of relative still pictures. This can greatly reduce and eliminate noise interference in signals, thereby improving the picture cleanliness. And reduce picture noise.

Under the market demand, the cost of laser products will be reduced, and the mysterious veil will be gradually unveiled. It will no longer be an exclusive product in a specific area and will gradually become popular. At the same time, in order to achieve the ideal application of infrared cameras, network, high-definition, intelligent is the inevitable trend of the development of infrared cameras.