apexis products and technology forum share apexis products to twitter share apexis products to facebook share apexis products to youtube share apexis products to ebuddy
Apexis is a high-tech company specializing in manufacturing ip cameras.supply ip camera,network camera,surveillance camera,wireless ip camera,wireless webcam,security ip camera and so on,Welcome to buy!
SHENZHEN APEXIS ELECTRONIC CO.,LTD
Business: sales@apexis.com.cn
Technical Support: tech@apexis.com.cn
Search   
What is Star Ultra low light camera

In order to achieve night monitoring, the main application is the infrared camera and laser cameras, two cameras can be described as strengths, which are using different principles and techniques to meet the demand for night surveillance. The camera's sensor can sense the part not visible, such as infrared light. The sensor has a sensitivity index, also called the minimum illumination values, which reflect the light on the weak response capacity, the higher the sensitivity of the light sensor, the stronger, the stronger the ability of infrared sensors. Due to the infrared sensor can sense, in the daytime, the light in the infrared images also entered, it will lead to an overall image reddish. So ordinary cameras are affixed to the surface of the sensor filter, filter out the light in the infrared. If the infrared camera also labeled such filters, infrared night-camera infrared light emitted by the initiative will be filtered out, resulting in the failure of infrared light. To avoid this situation, the high-end infrared cameras are generally equipped with dual filter, that day had opened an infrared filter, filter out infrared light in the evening closed infrared filter, so that the infrared sensor through the lens of the incident. This is the reason why the infrared camera in the human eye can clearly unclear nighttime imaging. Laser is a semiconductor laser and camera lens with components. The angle of the laser beam is small, energy concentration, ideal for long distance illumination; with a zoom lens, can be achieved with laser and camera movement, allowing the laser to produce a corresponding change in accordance with changes in the focal length of the camera. Relative infrared light, laser lighting can ignore the intensity of light, laser components and ultra-low-light sensor, the camera can achieve long-distance high-definition monitor in complete darkness, to ensure image clarity; secondly its long life, the laser surveillance cameras lifespan is three times the normal life of the infrared camera, which points to the need for 24-hour surveillance applications, the advantages of more prominent; furthermore conventional thermal infrared camera is large, not only need to consume more power, and heat in the body in accumulation, resulting in overheating of the body, it will seriously affect the life of the camera electronic components, and laser cameras do not have this risk. In addition, in certain light scenes with less stringent requirements, can be white or strobe lit up light, but also achieve better monitoring results. White light is the new green energy saving lighting, is a visible light, a cold light source, its biggest feature is its image as a color in the night, to see the scene and during the day there is not much difference, can provide more information, help investigation. Camera with white light is usually used for road monitoring project bayonet system or residential parking entrance. The strobe light is able to sync up with the electronic shutter camera images per frame, controlled by the camera's frame synchronization signal, and adapt to the camera's frame rate to make the appropriate frequency, according to a certain frequency of light shining up to the camera, thereby reducing its impact on the human eye and reduce ambient light interference photographs, are mainly applied security mount, speeding capture, running red lights and other environments.
Infrared and laser cameras in the external circumstances without any auxiliary source you can get a clearer picture, so they are more used at night without lights in the area. The relatively low price based on its overall advantages, making infrared cameras in recent years, the market share occupied by a linear upward trend. However, infrared and laser cameras there are still some shortcomings, such as the color to black and white, high energy consumption, poor heat dissipation, radiation from the infrared camera is limited, the illuminated area is not wide, and so on. The low-light cameras in recent years with the development of semiconductor technology and the introduction of the surveillance industry's hot products. Low-light camera refers to a darker light conditions (ie low light) can still get a clearer picture of the camera. At present, the security industry is usually divided into four grades front of the camera: general level camera, the general illumination values are greater than 0.1Lux; illuminance values range between 0.1Lux to 0.01Lux cameras, generally referred to as low-light cameras; and called to moonlight level camera, the illuminance values range between 0.01Lux to 0.001Lux; when the minimum illumination value reached even lower than 0.0001Lux, they reached a "Star-class" ultra low-light cameras, but these categories there is no absolute standardization. With the improvement of image sensor technology, as well as the effect of image noise reduction algorithm illumination applications, high-definition network camera is getting better, it is different from the infrared light source can make use of everything around, such as lights, corridor lights, the moon and even stars, etc. get real-time, full-color video images in low light situations, the use of ultra-sensitivity image sensor and unique electron multiplier and noise control technology can greatly improve the sensitivity of the camera, and have a 24-hour real-time color effects, absolutely no ordinary low-light cameras smearing appears to meet the demand for high-quality surveillance at night. The advantage is low power consumption, the effect of the real image, no color cast in the application surface, although less extensive infrared cameras, but also to a certain extent, have not irreplaceable. Currently widely used in low-light cameras day and night monitoring requirements for higher fields.
Low-light surveillance technology is mainly affected by the lens, image sensor, the back-end image processing technology and other factors, in order to achieve ideal illumination monitoring results, can be lifted from the following aspects: the use of a large aperture lens: the camera lens is the part the important part, it is low according to the monitoring role in the application of technology for the camera to focus on the subject of light targets, low-light applications and technology key here is that the larger the diameter of the lens will be greater the amount of light that is lens aperture increases the amount of light can effectively enhance, enabling the camera to obtain the desired illumination effect. Use a large target surface sensors: the nature of the camera is to light energy into electrical energy, the core components of a sensor to quantify the role of the sensor is to spread its body with different intensities of light for photoelectric conversion, convert the resulting digital voltage information image information. Receiving natural light on the sensor location is the core of the core. If the same resolution as the camera image sensor target surface area is larger, then the unit pixel, the greater the amount of light, the stronger the ability to suppress noise when shooting in low light, the better the image quality. Improved sensor technology: in order to achieve the desired effect of illumination, but also through improved sensor technology to enhance its sensitivity. The camera main body of the image sensor looks very simple, in fact, the production process and the micro-processing of very high technical requirements, such as back-illuminated CMOS sensor by improving the conventional internal structure of the photosensitive member, so that the photosensitive member layer reverses direction, the light from direct into the back, avoiding the traditional structure of the sensor, the light will be affected between the micro-lens and photodiode circuits and transistors, thereby significantly improving the effectiveness of light, greatly improved shooting in low-light conditions. Such sensitivity CMOS sensor has been close to the CCD sensor, excellent image quality in low light, but more integrated and more feature-rich and cost-effective. Good image processing techniques: conventional video camera using the traditional 2D algorithm to achieve noise reduction features, and 3D noise reduction technology is now used in the original frame noise reduction on the basis of the image by comparing two frames before and after the filtering process , which will identify the location of the noise, its gain control, 3D digital noise reduction function reduces noise can interfere with the weak signal of the image. Since the emergence of the image noise is random, and therefore noise appearing in each frame image is not the same. 3D digital noise reduction by comparing several neighboring frame images, the information will not overlap (i.e., noise) is automatically filtered off, using 3D camera noise reduction, image noise will be significantly reduced, the image will be more clear and thorough, thus showing comparison pure and delicate images. Increasing the fill light equipment: low-light cameras, such as Star-class bolt, can work in low-light environments, but some scenes, but also to enhance its monitoring results by increasing the white light of the way up.

Links :