Bayonet electronic police monitoring network in Jiangsu Province to meet the “3.20” engineering requirements, not only to achieve the above functions, and between the various functional modules to combine equipment and functions can not do simple addition. The only way to achieve true e-police bayonet.
Jiangsu province identified the road construction monitoring network, “3.20” project, that is all over in accordance with Motor Vehicle 3 km in urban driving, in highway driving 20 kilometers to photograph at least one of the general requirements, rational distribution, comprehensive coverage, the organic link, networked, so that track relay, continuous recording, to achieve all-round, full-time and space control to ensure that without leaving gaps and blind spots. Here the author of “3.20” project bayonet electronic police to talk about a few ideas.
A proposed industrial-grade HD choices Video camera Program. Electronic Image Collection to capture part of the police system is based on the work of the entire system, use high definition cameras, to ensure image quality, to ensure efficient and license plate image recognition. Currently, police officers on the front-end electronics Camera Equipment Common, there are three options.
(1), using industry standard definition camcorder video electronic police Product Maturity, long life, in the existing markets still occupy the mainstream position, but due to the low number of pixels (up to only 44 million pixels), installation complexity, Drive Features Camera Angle smaller more limited, panoramic camera images of traffic violation records are sometimes difficult to meet the requirements of evidence illegally (ie an image, clearly contains illegal vehicles and legible license, stop line, red), combination of multiple cameras need to capture images of the formation of illegal traffic violation, making the evidence less convincing.
(B), using a digital camera to capture the program (digital video camera body and digital cameras + industrial panorama camera), although the image resolution to capture high (800 million pixels or more), but modified to use more civilian digital camera , poor stability, and damage, the manufacturer is not responsible for general maintenance; same time, because a digital camera replacement quickly, with models of digital cameras in 2012 will be difficult to find. Another digital camera focus before every shot, the signal is triggered, the vehicle moved away from large, are not well adapted to the new electronic police Standard Requirements capture “car stop line” in the picture. Another example is when shooting at night, civilian digital camera shutter will be adjusted to greater than 1 / 125 second, in making car license vague, difficult to identify. And digital cameras electronic police can not function expansion card I decided to not meet the 3.20 of its engineering requirements.
(C), by way of industrial-grade HD camera to capture the red light violation automatically e-police Monitoring System Can not only provide high-resolution snapshot images, and because the camera electronic shutter, not the shortcomings of short life can be long-term stable operation. In addition, continuous high-definition camera can capture, to achieve bayonet feature. As a general definition camera digital transmission, so the system structure is simple, convenient, stable, reliable, low maintenance cost. Therefore, in terms of cost and effect of the integrated high-definition camcorder mode has a considerable advantage, as the industrial and high-definition camera to gradually reduce the price of high-definition cameras to capture red light capture mode will be the mainstream of the development of electronic police system model.
2, recommended video trigger, video detection technology program. Currently, police in the country through a red light electronic products according to capture the trigger, there are two main categories, namely, to trigger a sense coil and the video trigger.
To a sense coil in the lane need to cut circular groove, and then laid induction coil (or the sensor bar). Vehicles will be issued through the induction coil when the signal to the appropriate equipment, more accurate detection of vehicles. But because of the need induction coil buried in the ground, increased the difficulty of construction, increased cost of the project, when the need to change the road re-buried coil, another case of poor quality road maintenance workload on the coil larger need for regular replacement of the coil. In addition, the coil trigger installed in the road because a small number of fixed regions, generally can not accurately identify the vehicle trajectory, and thus can not determine the identity does not travel by Drive, illegal lane change, the complex parking abnormal traffic behavior.
Video trigger mode using image processing and analysis technology, the video of the intersection to locate and track vehicles, the vehicle trajectory to achieve the precise analysis to distinguish the red light does not travel by Drive logo, and other kinds of illegal lane change illegal behavior. Video trigger a powerful, easy maintenance, construction (without the laying and maintenance to a sense coil), at a reasonable cost and so on. With the rapid detection performance of such products increased, the video trigger is to gradually replace the coil to trigger a sense, a modern electronic police systems development.
Using video detection technology, even without access to sources of traffic lights, automatic traffic light signal on the image to identify and automatically match the corresponding lane, when the vehicle ran a red light, the system automatically start the capture function.
III bayonet electronic police system should be fully functional, to be able to combine the various subsystems as a whole.
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