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Do Surveillance Cameras Reduce Crime?

New York City with more than 4000 video cameras in just Manhattan, has adopted many of the same strategies as London, and cities across the U.S. are on a comparable path. These cameras make many people feel safer, but this technology can make other people concerned with a perceived loss of privacy.

The investment required for a surveillance camera can be significant. Some of these cameras can cost up to $60,000 each, and that is before the cost for human resources to monitor the output is considered. J.P. Freeman, a security market analyst company, projects that the U.S. will annually invest 21 billion dollars in these systems by 2010. The market for CCTV systems in the U.S. increased by almost 700 percent from 1980 to 2000.

Do the experiences to date, show that surveillance cameras improve the public's safety? Because of the political agendas in play, with the camera industry biased in favor and civil libertarian groups biased against, the answer is clouded with hyperbole.

For example, the headline from a news article about a study conducted by the University of California "Center for Information Technology Research in the Interest of Society" (CITRIS) read "SF SURVEILLANCE CAMERAS DON'T STOP VIOLENT CRIME". However, this CITRIS study found that the cameras were very effective in reducing property crimes within 100 feet of the cameras, resulting in a reduction of 24 percent, but that fact was buried in the news article.

The CITRUS study was very thorough and is frequently cited as evidence that surveillance cameras don't work, even though the study found significant positive effects from the cameras. However, because those results may not be consistent with the agenda, those results are often not reported.

There is also bias from industry groups, since they make their money from selling cameras. The newest technology in camera surveillance is the use of computers to interpret the data. This is a kind of artificial intelligence that is called "video analytics", and is potentially beneficial for efficient use of surveillance cameras, but this technology has sometimes been significantly oversold by the surveillance camera industry. This technology works best in less complex environments, such as a warehouse or loading dock that should be idle. Video analytics works much less well in busy environments like a crowd at a shopping mall.

"Some of the claims that are made are just ridiculous," says Oliver Vellacott, CEO of IndigoVision, a British company that develops video analytics technology. "It's important not to believe all the ridiculous hype and nonsense about what analytics can deliver."

It has been demonstrated many times that camera recording can be used to solve crimes. The Chicago Police Department estimates that the web of cameras installed in their city has been an important tool, resulting in more than 1,200 arrests since 2006. The Dallas Police Department has reported more than 1,700 arrests in a similar period from their camera system. We have all seen the news reports about the 2005 London Terrorist bombings of the subways. Without the camera systems, where officials were able to track the movements of the perpetrators, it is very likely that it would have taken much longer to solve those crimes.

Surveillance works best when there is a system observing the camera output. But human time is expensive, and this is where video analytics can be important. If a computer can screen many cameras, and have the human review only the probable events, then a single human can monitor many more cameras. It is also more rewarding for the human not to watch camera output from eventless images. But we should keep our expectations realistic.

If we believed Hollywood, camera systems with this kind of artificial intelligence have almost mystical power. The truth is that it is very difficult for a computer to interpret many environments, at least with today's level of technology. However, a computer system equipped with video analytics software, teamed with a skilled human, can effectively monitor many cameras.

Chicago has hired IBM to install camera systems with video analytic software. "That's really going to just throw our camera network into hyperdrive," said Kevin Smith, a spokesman with the Chicago's Office of Emergency Management and Communications (OEMC). "Ultimately I think what this software might be able to do is simply recognize suspicious behavior and alert our operations people and, at times, our crime detections specialists as to what it sees." Chicago is installing surveillance cameras on all of their buses and subways to provide mobile eyes on the city. Once their mobile broadband system is in place, the data will be available in near real-time. Chicago is the world leader in the application of video analytics on this scale.

Surveillance cameras can be a deterrent to crime. In a study of convenience stores, CCTV surveillance showed impressive results. A sample of 81 stores were studied for 1 year before and and 1 year after the installation of CCTV camera surveillance systems. The rate of robbery decreased by 53 percent after the cameras were installed. The New York City Housing Authority estimates that the CCTV systems have reduced crime by 36% in their public housing. Baltimore (17%), Dallas (11%) and Philadelphia (37%) also report improvement in the rate of crime because of their downtown camera monitoring systems. However, not every city reports improvement. Washington D.C., for example, says that their cameras have proven ineffective. In a British study, of 14 British cities that utilized a CCTV system, the systems had little effect on crime in six of the cities.

The conclusion is that a successful camera surveillance program requires more than just installing hardware. An effective program comprehends that a camera that is not monitored, is a dumb piece of hardware, and the camera system will lack credibility. Dallas uses retired and light-duty officers for their camera monitors. Smart systems (video analytics) can make human monitoring much more efficient. Over time, as camera systems successfully address crime, the deterrence effect of the cameras will improve. This is the message from London and New York.

About the Author:
Brian Bradshaw's work incorporates more than 25 years working with advanced instrumentation and information technology. He specializes in implementing Security Camera Systems for small and medium sized businesses in the Southwestern United States with offices in Dallas and Phoenix. For additional information, please visit us at B V Technology Video Analytics and Surveillance Cameras.

About the Author

Automated Multi-Camera Surveillance $134 The deployment of surveillance systems has captured the interest of both the research and the industrial worlds in recent years. The aim of this effort is to increase security and safety in several application domains such as national security, home and bank safety, traffic monitoring and navigation, tourism, and military applications. The video surveillance systems currently in use share one feature: A human operator must monitor them at all times, thus limiting the number of cameras and the area under surveillance and increasing cost. A more advantageous system would have continuous active warning capabilities, able to alert security officials during or even before the happening of a crime. Existing automated surveillance systems can be classified into categories according to: The environment they are primarily designed to observe; The number of sensors that the automated surveillance system can handle; The mobility of sensor. The primary concern of this book is surveillance in an outdoor urban setting, where it is not possible for a single camera to observe the complete area of interest. Multiple cameras are required to observe such large environments. This book discusses and proposes techniques for development of an automated multi-camera surveillance system for outdoor environments, while identifying the important issues that a system needs to cope with in realistic surveillance scenarios. The goal of the research presented in this book is to build systems that can deal effectively with these realistic surveillance needs.

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UDW20005 Video Surveillance System $211.11 Manufacturer: Uniden Corporation Manufacturer Part Number: UDW20005 Manufacturer Website Address: www.uniden.com Brand Name: Uniden Product Model: UDW20005 Product Name: UDW20005 Video Surveillance System Product Type: Video Surveillance System Technical Information: Product Features: Camera Display & Graphics: Video Resolution: 320 x 240 Motion JPEG Video: Video Formats: Motion JPEG Camera: Image Sensor: CMOS Network & Communication: Network: Wireless Package Contents: UWDC25 Wireless Weatherproof Camera UDW20000 Receiver AC Adapter for Camera AC Adapter for Receiver Extension Cord Camera Stand Software CD USB Cable AV Cable Antenna

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Waterproof Color IR Surveillance Camera $481 Nightvision Security Camera Keeps Guard Day And Night 1/3" Sony Super HAD CC High Resolution Camera 18 Nightvision LEDs Captures Images Up To 100 Ft. Durable And Waterproof True Day & Night with ICR Mechanism Up To 60 Ft. Of Long Distance Recording Outdoor Security Security will never escape your grasp with the Color IR Surveillance Camera . With up to 60 FT of long distance security video, you can maintain your surveillance system at a distance. Perfect for shipping yards or for remote surveillance operations . The security monitoring system works great outdoors and is even waterproof to withstand the elements while giving you the best surveillance device you can get. High Resolution Images For Optimum Crystal Clear Surveillance This high resolution 550 TV Lines security camera will give you the clearest in color surveillance video. If someone robs from you, being able to identify that person to the authorities will speed in his or her capture and the return of your property. Make sure you can make out everything with this high quality spy camera . The 0 Lux nightvision will ensure that your surveillance equipment is maintained even in the dark. No criminal will use night as a cover when they see your business is protected with a security video camera . Features: Varifocal lens adjusts to all the action High resolution 550 TV Lines for the clearest image 0 Lux nightvision for optimum security even in the dark 18 high density LEDs capture images up to 60 FT Waterproof for outdoor surveillance Specifications: Image Device SONY: 1/3" SUPER HAD CCD w/ HQ1 Chipset Total Pixels: 811(H) x 508(V) Effective Pixels: 768(H) x 494(V)       Horizontal Resolution: 550 TV Lines (Color) S/N Ratio: More than 50dB (AGC OFF) Scanning System: 2:1 Interlace Electronic Shutter: 1/60 - 1/100,000sec Auto Sensitivity: 0 LUX (IR LED ON) Sync. System: Internal Gamma Correction: Y=0.45 Video Output: Composite 1 [Vρ−ρ] 75(Ω) unbalanced Power Supply: DC12V (±10%) Operating Temperature: -10˚C ~ +50˚C Operating Humidity: 10 % ~ 80 % IR LED: 18 HIGH DENSITY LEDS IR LED Wavelength: 850nm IR LED Half Angle: ± 15 degree IR LED Working Distance: 60' Application: Out Door / Waterproof (IP67) Dimensions: 60(mm)φ x 145(mm) (With Sunshield) Lens: Focal Length: 4.06mm Sensitivity Range: 400-900nm Field of View: 72.9°(D), 61.2°(Η), 47.8°(V)

Mace MDIY-DVR084CKIT Video Surveillance System $511.99 0Lux 1 Year 1 x 15-pin HD-15 VGA Out - DVR 1 x Alarm Out - DVR 1 x DC Power Input - DVR 1 x RCA Audio Out - DVR 1 x RJ-45 Network - DVR 1 x RS-485 Serial - DVR 10/100Mbps Fast Ethernet IEEE 802.3u 19 V DC 2 x BNC Composite Video Out - DVR 352 x 288 @ 25 fps - DVR 352 x 288 @ 30 fps - DVR 4 4-pin Type A USB - DVR 420 Line - Camera 500 GB 8 x Alarm In - DVR 8 x BNC Composite Video In - DVR 8 x RCA Audio In - DVR 8-Channel Digital Video Recorder 4 x Cameras 4 x Plug & Play Cables Camera Power Supplies Remote Control USB Mouse Power Supply CD and Documentation Ease of Installation Internet browser and smartphone connectivity for remote surveillance anytime from anywhere with network access E-mail alarm alerts with snapshot image attachment for instant notification of detected events CCD Camera Digital Video Recorder Fast Ethernet H.264 MDIY-DVR084CKIT MDIY-DVR084CKIT Video Surveillance System Mace Mace Security International, Inc NTSC Not Applicable PAL Video Surveillance System www.mace.com

Lorex Security Camera for LW2702 Series Digital Wireless LCD Surveillance System $139.99 Enhance the functionality of your existing Lorex LW2702 series digital wireless LCD surveillance system with this security camera for an expanded viewing area. IR LEDs provide night vision at a range of up to 40' to help you protect your property.

4XEM IP7130 Surveillance/Network Camera $177.99 0.1Lux - F1.6 1 Year 1 x Audio Out 1 x DC Power Input 1 x Microphone 1 x RJ-45 Network 1.37 lb 12 V DC 2.44" Height x 2.83" Width x 6.06" Depth 4XEM 4XEM Corporation 640 x 480 @ 30 fps MPEG-4 640 x 480 @ 30 fps Motion JPEG Dual Streams Simultaneously Tamper Detection for Unauthorized Changes 3GPP Mobile Surveillance Built-in 802.3af Compliant PoE Two-way Audio via SIP Protocol Digital I/O for External Sensor and Alarm IP7130 Network Camera 32-Channel ST7501 Central Management Software Multi-level user access with password protection IP address filtering HTTPS encrypted data transmission OS: Microsoft Windows 2000/XP/Vista Browser: Mozilla Firefox, Internet Explorer 6.x or above Cell phone: 3GPP player Real Player: 10.5 or above Quick Time: 6.5 or above Focal Length: 4mm Vivotek's IP7130 fixed network camera is an economical and easy-to-use surveillance system designed for indoor applications such as offices, banks, and retail stores. This camera comes with the tamper detection feature, which detects data loss from camera tampering in real-time. When the camera is blocked, redirected, or spray-painted, security staff will be alerted immediately in accordance with the camera settings. With its dual-stream feature, the IP7130 also allows two video streams to be delivered in different resolutions, frame rates, and image qualities for individual recording or bandwidth demands. CMOS Cable Color DDNS DHCP DNS FTP HTTP HTTPS IGMP IP7130 IP7130 Network Camera NTP Not Applicable PC PPPoE RTCP RTP RTSP RoHS SMTP Surveillance/Network Camera TCP/IP UPnP Yes www.4xem.com