security camera housing dome AIRPORT MAKES MOST OF SURVEILLANCE TECH
In the communication room of San Francisco International Airport, security cameras scan the airport and tourists there.On Friday, August 17, 2007, KURT _ camer _ 0017 _ kr, the San Francisco Securities Regulatory Commission's Chronicle.Jpg mandatory credit for PHOTOG and SF ronicle/no sales-Mags out reduces the communication room at San Francisco International Airport, where security cameras scan the airport and tourists.On Friday, August 17, 2007, KURT _ camer _ 0017 _ kr, the San Francisco Securities Regulatory Commission's Chronicle.Jpg mandatory credit for PHOTOG and SF ronicle/no sales-As San Francisco strives to address the effectiveness of surveillance cameras in combating street crime, it may tend to take the San Francisco International Airport as an example, since the terrorist attacks, the company has made great progress in using this technology.11.Airports like SFO, with sufficient federal funding and the necessary stimulus, have not only deployed surveillance cameras, but also used new screening software to highlight potential security risks, that way the security guard wouldn't stare at the screen for hours at a time.But while airports are ahead of cities in video surveillance, researchers say airports have made progress first since the beginning of the last century.11 attacks are not easy to move to cities like San Francisco that are trying to curb violent crime with cameras.Dilip Sarangan, a video surveillance technology expert at Frost & Sullivan Market Research, said: "When you compare two different systems, airports and public spaces, the airport has all the advantages.A very public debate about the city's use of surveillance cameras at high levelsLast week, after news at a meeting of the public safety committee of the board of supervisors that the cameras were ineffective in helping to resolve homicide cases, the crime scene broke out.Since 2005, the mayor's office has placed 70 cameras around the city for $500,000.The housing authority has already spent an extra $200,000 to install 178 cameras in town.Since Sept.The Department of Homeland Security has been investing money in various forms of airport security, including video surveillance.A spokesman for San Francisco airport said the facility has spent $0.15 billion on all forms of high-rise buildingsTechnical monitoring over the past five years or so.While he could not disclose the portion spent on video, it certainly dwarfs San Francisco's $500,000 spent on video surveillance systems.In addition, airports are very small compared to cities, but their financial advantages allow them to deploy cameras more freely.SFO officials told the Chronicle that in 2006 they had spread 1,500 surveillance cameras throughout the airport;There are 248 cameras in San Francisco.Even if these public cameras stop crime in the area they deploy, the bad guys can simply transfer their actions.The airport has clear sidewalks so a traveler at the airportThe restriction of access immediately raises doubts and has the potential to violate the law.In contrast, the reason people enter and leave cars, doorways, and other niches in urban streets is innocent, such as rushing to an appointment, or malicious, such as deliberately creating chaos.All these Airport advantagesMore money, less patrol space, and pretty good-Allowed behavior definition set-Combined with video surveillance as a crime prevention tool, it provides technical advantages for airport monitoring systems to solve the biggest problems: monotonous and boring.Security guards staring at the bank screen began to fadeTim Ross, executive vice president of San Francisco's 3VR company, said that it took only 20 minutes to miss the obvious event. 3VR is a company dedicated to technical problem solving."We talk about the concept of a monitoring gap between what we capture and what we can analyze and understand," said Ross, who, with 30 million surveillance cameras in the United States, take 4 billion hours of images per week.Technology companies like 3VR have been developing software pre-screening programs to help secure agents.These are computer algorithms that take advantage of the ruthless and non-flashing capabilities of the microprocessor to evaluate the video stream.When they "see" an activity that is defined as a concern --One person skips a fence or truck parked in the wrong positionThey can trigger a flashing alarm on the security screen, and the security guard can then determine whether to send an officer to investigate.There are some limitations to these new video analytics programs that make them useful in an airport environment, but not perfect.But Sarangan says the same restrictions make them almost useless in urban settings.It all goes back to the limited space and the expected behavior.At the airport, you violate the law if you skip the fence, but in an urban setting, it may just be a shortcut for an energetic child.How should Software know?If the automatic alarm system generates too many false alarms, law enforcement officials will ignore them, experts say."Lighting has also played a big role," Sarangan said .".In the San Francisco scene, this means that a sudden burst of fog can blur the light, even during the day, enough to make the images taken useless.At the airport, the lighting quality is controllable and consistent.Lenore Anderson, deputy director of the San Francisco mayor's criminal justice office, said that her department really did not study the concept of adding software analysis on top of the current digital capture system, part of the reason is that the city is just testing the overall concept of video surveillance."When you walk into the community and talk to your grandmother and everyday residents, they say, 'Put the camera in and we want the kids who break the car --"Plug-in," she said."But once you start installing the camera, you will be hindered by the issue of civil liberties."In fact, Ken Goldberg, a professor of engineering at the University of California, Berkeley, is an expert in computer video and its impact on civil liberties, and he questioned the root cause of installing cameras."These cameras...It is not yet possible to reliably identify the face or automatically determine the time when the crime took place.