Rapid development of the world economy, a sharp increase in transport volume, worsening traffic situation. To solve this problem, the United States, Europe, Japan last century began in the late 1960s. began Intelligent Transport System (ITS Intelligent Transportation System) study. In the 21st century, the rapid development of the world economy, road transport has become increasingly busy. Traffic is the economic lifeline of development, However, the development of transport vehicles lag the growth rate and economic development of road transport demand, a little unexpected incident would cause serious traffic disaster due to traffic accidents caused heavy casualties and property losses caused world wide attention especially large and medium-sized cities frequent traffic jams, as the capital of Beijing has been called the "first block." In addition to road and the expansion of the increase, as the current ITS countries in the world competing transportation research and development at the summit. According to Philip Sayeg and Philip Charles forecast, in 2010, China and the five countries of the South Asian Association for Intelligent Transportation Systems market potential is estimated at 38 billion dollars.

ITS Intelligent Transportation Systems, Traffic Monitoring System is undoubtedly the most important, it is like the human visual system. Traffic Monitoring System should be formed under the system examples :
(1) Control of urban road;
(2) Freeway monitoring;
(3) fairway safety monitoring;
(4) The monitoring operation;
(5) sudden case of an emergency dredge;

City traffic control according to the city's specific conditions, In every traffic junction can be installed one or several stationary surveillance cameras, the external further equipped with a pan and tilt camera. Fixed surveillance cameras Acquisition city road traffic conditions such as real-time traffic flow, speed and the degree of patent video signal, Monitoring distance traffic junctions within a certain range of vehicles, in the daytime and at night clearly captured vehicle licenses, It also pictures of records of motor vehicles and other road traffic information analysis, processing, particularly for vehicle registration information and the automatic identification and processing, and the traffic regulations, Hit-and-run suspect vehicles and the control and disposal of investigation, checking some obvious and combat illegal sexual offense, eliminate all hidden dangers. Pan, tilt and zoom camera control centers need artificial control of the camera for level 360, 90 degrees and the vertical zoom control, the control of monitoring the traffic around the details of unexpected incidents and traffic congestion.

Freeway surveillance system and control urban road slightly different. Expressway and Highway general compared with linear, and the high design standards, traffic, traffic speed, and other characteristics, In traffic, bad weather circumstances, and the extreme traffic congestion. Some very large traffic volume on the highway has the full deployment of surveillance systems. Freeway surveillance system from process monitoring and control stations charges, Monitoring service area freeway system as well as ancillary services, the power monitoring. Monitoring System which charges mainly on the pay station lane toll plaza, the toll booths in the charges, right through the toll lane types of vehicles, Members of the charges and the process of the course in case of emergencies and special events were observed and recorded, the implementation of effective supervision. These monitoring system to implement traffic surveillance and traffic operations, the key point for meteorological detection, Key sections of timely implementation of traffic control and the timely detection of anomalies and take emergency measures, For vehicles speeding violation record, and effectively guaranteed the highway speed, security, economic and operational management.

Fairway safety monitoring system is mainly used for monitoring the surveillance equipment lock, the upper and lower reaches of the distance between vessels, Lock and the distance between ships, such as the number of vessels to prevent collisions at sea level and gate opening collisions caused by the poor, the ship capsize.

Monitoring Metro subway system is mainly used for the site, in addition to real-time network monitoring the operation of the site. ensure that the surrounding environment and seeing the personal safety of passengers, urgently in the incident (such as fires, explosions, traffic accidents, harmful gas leak, etc.) under the coordination of the station's equipment running vehicles. Scheduling improve the speed, timely flow of passengers.

Town sudden case of an emergency, including emergency medical dispatch, fires, earthquakes, mudslides, landslides, explosions, toxic gases, liquid spills, and other criminals to escape. Once unexpected incidents, we must help support the traffic control system developments, and maintaining social stability.

Traffic Monitoring System can be controlled real-time monitoring of traffic within the scope of the operation of the vehicles illegally. Graphic jams, and other information provided to the main transport hub for decision-making and command center for handling basis, Operation of vehicles awakened statistics, assisted traffic control personnel, Early detection and treatment may cause some major traffic incident that is a hidden danger for snow, heavy rain, typhoons and other natural disasters occur, take proper contingency plans. It is also immediate, impartial and acquisition traffic violations after evidence of scientific management tool.

Monitoring System as the core video surveillance cameras were used to film the scene. Video signals are collected to the central control department was revealed to the Monitor, from the computer and video analysis to arrive at a correct judgment. ITS Intelligent Transportation Video Surveillance roads are divided into three types : First, the early analog video monitoring, fully completed by the human right to the monitor screen analysis, judgment; Another one is analog and digital combination Front Simulation camera output analog video signals back through the computer to capture images useful for digital processing, Intelligent analysis; 3 is the digital video surveillance, intelligent front-end for IP digital network cameras, Such surveillance technology into a large number of computer technology to help people of all acquisition and management of video information, Monitoring the performance of the system have been effectively improved. Now most of the traffic control system was used in analog and digital combination of mature programs, But digital video surveillance technology has the obvious advantage is its rapid development, as computer and network technology, advanced and mature digital video monitoring system will become mainstream.

Traffic monitoring system if the video than for the human visual system. Then the video camera system like the human eye, and its importance is self-evident. So traffic monitoring cameras selecting more harsh.

First to consider two points : First, the camera performance, Camera performance has a direct relationship to the various conditions can show a clear picture at night can see license plates, Photos, true color images; Second, the reliability of the camera, cameras in the possibility of evil strategic environment under long-term stability and ensuring that the image quality does not deteriorate, the failure rate is low. If a traffic monitoring system of "eyes" is not good enough, or often make mistakes, even if some other system again perfect, The entire system is also very clear deficiencies.

Traffic Monitoring the use of cameras is the largest fixed lens cameras, Such cameras in the choice and application should consider the following points :

1, clarity of the camera. Image resolution to the level of more than 480 lines, high-definition cameras to be allocated for high-definition monitors.

2, the low light cameras, also known as sensitivity. Most low light indicators should not look at the figures in front of the number, but should look at the indicators of the conditions under which the test. If the low light color .15Lux/F1.4 0 / 50IRE/AGC ON, This shows that 0.15 Lux is the low light-volume links F1.4 lens, Video signal level measurement in 50 IRE (350mv), AGC ON under conditions determined by. If the optical links for large F1.0 lens, the video signal level measurement in 25IRE, measured the low light indicators lower. 1 / 2-inch CCD camera sensitivity and image quality than 1 / 3 inch CCD cameras.

On the IRE, definition CCD camera's video output amplitude of the largest 100 or 700 IRE millivolt, a 100 IRE Video said it would complete a driver the best performance monitor brightness and contrast of the image quality, Only 50 or 350 millivolt IRE Video said that only half of the contrast, 30IRE or 210 millivolt said that only the original amplitude of 30%, usually 30 IRE is the lowest numerical images available, a standard video camera when the automatic gain to a maximum gain noise grade should be 10 IRE, So can provide 3 : 10dB signal-to-noise ratio or an acceptable image. One in 10 IRE measured results can be compared with the 100 IRE measured the results 10 times higher, There is no marked IRE levels of the results, in fact, has no meaning.

3, camera noise. In light of the good, the camera has a very good signal-to-noise ratio, image perspective not see Picture, but in the light dark, good signal-to-noise ratio indicators is a clear camera images Picture fewer points, the signal-to-noise ratio indicators of poor cameras, Tentative point will be inundated the entire image.

4, a bright light inhibition. Monitoring cameras require road at night clear pictures of car license, which requires better indicators of a bright light inhibition. In professional broadcast TV cameras, this indicator called vertical low spot. Using the technology of cameras, can effectively inhibit the face of the bright lights, vehicle license clearer arrested caught. true picture of integrity. Many roads surveillance cameras "eclipse" technology, the plates very good shooting night, But during the day also saw a "eclipse", which affected the overall image of beauty and integrity.

5, backlight compensation. Camera shooting plates at night, backlight compensation technology has a direct bearing on whether it is clear to see license plates, Video can make back-end detection and analysis system is the correct judgment.

6, camera color reduction. Camera no specific color indicators, which can be used white balance adjustment and color adjustment so that the true color reduction. Different types of cameras color reduction level is different. This indicator is only through debugging and true color and the scene comparison.

7, cameras to reliable quality and the installation to facilitate debugging. Most road monitoring cameras installed at 9 ~ 15-meter-high column, Installation and removal requires specialized tools cars or dangerous high-altitude operations, if not the quality or reliability testing inconvenient, Construction is bound to have a great project and the cost and impact on the normal use.

In fact, the best road surveillance cameras with wide dynamic cameras, and wide dynamic camera inhibitory effect of bright light is very good, However, wide dynamic CCD camera and DPS wide dynamic camera photographing fast moving vehicles are not given satisfactory results. With the new technology DPS gradually mature, the road ahead surveillance cameras will be widely used DPS wide dynamic camera. The toll station, car parks and other venues, wide application of dynamic camera will produce good results.

Currently road monitoring cameras, and a large variety of 1 / 2 inch CCD cameras use a larger, Japan's main JVC, Ikegami Japan Chihshang, Panasonic, Sony, British Becker, Samsung and other international brands, and some domestic brands. Some large and medium-sized cities road monitoring systems or use the camera to well-known brand abroad mainly, which JVC TK-C1481 1 / 2 color camera on the road has been monitoring the market to occupy a large market share places, the vast majority of intelligent transport systems integrators, recognized by the buyer. However, the company surprised the Japanese ICD-828P road surveillance cameras with a high-quality, true color reduction, high reliability characteristics in practical applications become the most cost-effective way of monitoring cameras.

Japan surprised the company is a world renowned manufacturer of cameras, radio and television cameras has been ranked first in the world. and in 1961 began production monitoring cameras. Chihshang Broadcasting Corporation television cameras to the low vertical beam technology, backlight compensation and gamma. Inflexion automatic adjustment of the best technology and focusing on the road sodium vapor lights automatic white balance adjustment techniques applied to the road monitoring camera and Chihshang consistent high quality, high reliability, and other characteristics, This road so that the road surveillance cameras monitoring the quality cameras.

ICD-828P 1 / 2-inch color monitor road cameras, with a horizontal resolution of 530 lines. vertical beam indicators to-126dB (Chihshang Broadcasting level cameras to-135dB). Monitoring cameras rarely see the vertical beam indicators, in fact, Spot is a CCD sensor characteristics, the sensor is not anything to stop wearing bright light exposure and the launch of the CCD, to produce more electronic, The result is a strong image in the light when the vertical stripe is usually appear in the image is covered by the relevant details. Camera which is the lowest illumination 0 .15Lux/F1.4/50IRE/AGC ON, signal-to-noise ratio is greater than 52 dB. Security and the Ministry of Public Security in the use of the Product Quality Inspection Center of the two Taiwan detection products for the lowest illumination .11Lux/F1 0. 4/50IRE/AGC ON and 0.09Lux, signal-to-noise ratio of 57dB and 59dB. and professional radio and television cameras in the signal-to-noise ratio of 60-65dB. In order to facilitate the installation and testing of the project to the camera, Chihshang unique remote control device RCU-701 will enable debugging without high-altitude operations staff, at the construction site is easy to debug camera parameters. Both from the technical indicators practical application of the effects, like the town's famous road monitoring machines can be regarded as fine.

Although the cameras in Intelligent Transportation Systems occupies a very small proportion, but its importance is not in question. Video Capture in need of a key position should use the higher performance cameras, In general location as long as performance requirements can be satisfied, but the reliability is the main consideration. This can reduce system costs, the system can meet the front cameras objectives.

Monitoring the development of the all-digital intelligent digital monitoring technology. Its main feature is the front-end intelligent camera, in almost no human intervention circumstances, Through the camera recording the image sequences for automatic analysis of dynamic scene of the goals for positioning identification and tracking, and on the basis of this analysis and objective judgment, can be completed so as to maintain day-to-day management of the anomalies can happen when timely response, replace a human mission control most of the work, is the next generation of highly intelligent control technology. Global figures from the 2006 Forum perspective, such as Intel, the world's largest chip maker has begun to develop digital monitoring chip, Intelligent digital monitoring technology for intelligent traffic has been only a matter of time.