Logistics and warehousing requirements for video surveillance technology

Video image, it is necessary to "see clearly" should be "able to understand", seemingly simple (universal definition has been), but in reality the long and tortuous road, long way to go - poor low-light night, backlit indoor see Intelligent analysis impractical.
WDR
For loading and unloading area, the ability to see inside the boxcars cargo storage and handling the situation is very important, wide dynamic mainly to solve the problem of camera backlight compensation, wide dynamic technology continues to mature, the past two years, sales have wide dynamic camera the rapid growth. WDR technology has become an important indicator to measure the performance of a camera. For now, the standard wide dynamic function, has become the consensus of all IPC vendors. From the technology, wide dynamic mainly divided into CCD + DSP and CMOS + DPS two technologies.
CCD + DSP:
This core double exposure (or double shutter) technology are: light and dark contrast against the larger scene, the camera on the bright area to a quick exposure, bright region to get a clear picture of the normal image and stored in the data buffer memory, Then the dark region of the scene to conduct a slow exposure, dark areas of the picture to get a clear image, also stored in the data buffer memory. After completion of the above exposure, the use of DSP specific image processing algorithms, the brightness of the two images among the appropriate fractions were cut out, and finally synthesizing and outputting a superimposed light and dark areas of the image are clearly visible. So as to avoid overexposed highlights and underexposed dark issue, so that the entire screen is visible, in order to achieve wide dynamic processing effects.
CMOS + DPS:
DPS uses a single exposure of each pixel and control technology, coupled with the use of multiple frames acquired CMOS sensor Synthesis of a linear combination of a complete image, the two exposure compared to CCD imaging with higher dynamic range. Numerically speaking, using DPS technology, CMOS cameras, the dynamic range can theoretically reach 120dB. At the same time expanding dynamic range, DPS also solves the problem in dealing with CCD sensor dynamic range and color authenticity, its color reproduction is more realistic to meet the application requirements. Use of this technology in digital image sensor in the camera each pixel are used in an analog-digital converter (ADC), when capturing the light signal is directly converted into a digital signal, minimizing the signal attenuation in the arrangement and interference.
Current general surveillance network cameras are mostly used CMOS + DPS wide dynamic technology, application scenarios widely, has become an indispensable function HD cameras, the market demand is very strong. Planning from chip manufacturers, the multi-frame is one of a wide dynamic trends, the effect is more smooth, transparent, wider dynamic range.
Star-class
For video surveillance applications in terms of low light performance is usually one of the standard reference product selecion. Low-light performance of high-definition cameras to meet the clear color images under low light, and in total darkness or low illumination conditions can also provide a clear black and white images.
Many manufacturers are currently on the market claim to have their own low-light Star product, but there is one concept which a lot of ingredients. The true meaning of the stars should be in HD 0.002lux illumination, restore the color, no tail 1080P resolution of not less than smooth images. To achieve this target mainly depends on two aspects of the technology. The first is the choice of sensor. Followed by the ISP adjustments can often be seen from different manufacturers using the same scheme, the same sensors in the market, but low-light effects are quite different.
Of course, any low-light cameras need to have some light before use, as the size of the light intensity is directed to low-light sensitivity of the camera. So 0LUX cameras are not needed by the infrared light to fill light in order to make the camera work. However, in some places the infrared camera is banned, so far, the low-light cameras still has its irreplaceable position. As some important warehouses ban infrared ultraviolet rays, and these places must also be monitored 24 hours. In some explosive warehouse, due to the large amount of heat infrared camera, could easily lead to spontaneous combustion resulting in a fire, an infrared camera is also prohibited in these areas. Tide monitoring network to promote and market demand, driven by Star-class because of its advantage of high-definition cameras and low light low light and other special occasions, is bound to get a lot of applications.
Star-class illumination products appear, completely solve the nighttime surveillance infrared night obscured image or black and white images. And with manufacturers of complementary product lines, it is the Star-class products to almost all common application scenarios.
Intelligent analysis:
Warehousing warning area (entrance, important area, the wall) to complex weather conditions (such as rain, snow, fog, wind) weather precision monitoring, when an exception occurs, the system will immediately alert, and automatically track the target track record, will Later video tracing into effective prevention and suppression, to enhance the safety factor management. Although the application of the growing popularity of video surveillance systems, but mostly through artificial way to view real-time monitoring of video. Difficulty concentrating because of human time, the effect of artificial monitoring events grows dramatically attenuated. To solve such problems, intelligent video applications technology came into being.
The main algorithm include: Regional alert - for the user to set the automatic movement of persons within the region and alarm monitoring, such as detecting whether a pedestrian or vehicle entering the predetermined area (or the line) and prompts alarm. Behavioral analysis - automatic monitoring and alarm for staff fights or strenuous exercise. Items left / lost items - for a suspicious person or vehicle for a long time wandering or staying automatic monitoring and alarm within the specified area, when the rest of a person or vehicle suddenly disappeared within the automatic monitoring and alarms. Face Detection - After the set area for pedestrians face detection and tracking, screening dispatched face image in real time, and provide the basis for the later query.
Intelligent analysis technology for multiple applications, not only can be integrated in front of the camera, you can also be implemented in software in the back-end management platform, can be flexibly configured according to the needs and the actual project cost estimates. Intelligent analysis of the merits of the main technical considerations accuracy, which the selection and deployment of field cameras put forward specific requirements, such as depending on the scene (applies to door, corridor and elevator even outdoor channels, etc.), considering the camera and the ground clip angle, the angle between the camera and the target direction, lighting conditions and weather conditions (sunny cloudy and snow will bring different effects).