Intelligent surveillance with video analytics
April 2017, CCTV, Surveillance & Remote Monitoring
There has been much discussion recently about the differences between (and resulting advantages of) thermal cameras and traditional visual cameras for surveillance purposes. Visual cameras use light to create images, while thermal cameras rely on heat to translate an image into a visual picture.
Laurence Smith, Executive at Graphic Image Technologies.
Due to the dependence on light to create images, visual cameras have an innate shortcoming. Much like the human eye, if the weather or lighting conditions are bad, the visual camera’s imaging will be adversely affected while thermal camera’s will present a consistent image regardless of weather and lighting. It is this major disparity between visual and thermal cameras that makes them suited to different tasks, which means that when planning a security surveillance system, it is not an either-or decision. It is not a case of choosing between visual or thermal cameras, as both have their strengths, and all that is required to maximise on these strengths is strategic planning and the correct application of video analytics software.
Match the camera to the task
Thermal cameras are designed for placement where lighting is an issue. Since the sensor picks up a heat signal rather than a visual one, it will work regardless of weather conditions, presenting a consistent image. On the other hand, visual cameras are affected by the absence of light, which has an impact on the range of the camera.
A range of 300 metres during the day, for example, is reduced to 50 metres at night in the absence of decent floodlighting. While in theory, thermal and visual cameras should be able to achieve similar ranges, provided that the appropriate lenses are in place, in reality visual cameras simply do not have the same reach as thermal.
This weakness, however, is offset by the ability to achieve ultra-high definition resolutions using 4K cameras – such cameras deliver an exceptional picture that it is possible to visually verify physical details, like hair colour, facial features, vehicle registration plates and the like. Such detailed visual imagery is simply not possible with thermal cameras.
As a result of their specific strengths and weaknesses, thermal cameras are best suited to the protection of large perimeters, performing an intrusion prevention task. Visual cameras are suited to applications where detail is necessary such as entry and exit points as well as the interior of buildings and warehouses. This means it is essential to have a combination of both in a surveillance system.
Smart video analytics
The key to maximising the effectiveness of both thermal and visual cameras is the video analytics component. It is now possible to use a computer or analytics engine to do a lot of the work that a human would have had to do in the past. By setting up rules within the video analytics system, it is possible to set up alerts for certain scenarios, to trigger an appropriate security response ensuring personnel can quickly identify potential threats and incidents and execute on these, without delay. Video analytics enables what is essentially “blank screen monitoring”, in that the system will give notifications of risks according to specific rules set up, and guards are not required to constantly have their eyes on the camera feeds.
Using sophisticated algorithms and pixel-by-pixel analysis, video analytics can pick up on the smallest of details provided by visual and thermal cameras, while thermal cameras catch everything that visual cameras might miss, given their vulnerability to being blinded by bright light, lack of light and adverse weather conditions. In short, video analytics removes the scope for human error and drastically improves monitoring efficiency. By automating many of the functions previously performed by humans, technology makes the surveillance element of security far more reliable. The right combination of modern 4K cameras, with thermal cameras on perimeters, combined with video analytics software in the CCTV setup, can ensure that the strengths of both cameras work to negate their respective weaknesses.
Without a doubt, thermal cameras are the best 24-hour imaging option, while 4K cameras simply can’t be beat when it comes to taking note of the details. It is thus practical for businesses to stop debating the differences between thermal and visual cameras and instead, to implement a well-planned surveillance system that is equipped with both types of cameras, fuelled by the power of smart video analytics software.
For more information contact Graphic Image Technologies, +27 (0)11 483 0333, <a href=mailto: firstname.lastname@example.org> email@example.com</a>, www.git.co.za
- The Battle: Human vs Machine
October 2017, C3 Shared Services, This Week's Editor's Pick, CCTV, Surveillance & Remote Monitoring
The concept of video analytics technology is to present only the information that will require an operator’s immediate attention.
- What’s in a platform?
October 2017, Milestone Systems, Naxian Systems, Genetec, This Week's Editor's Pick, CCTV, Surveillance & Remote Monitoring, Integrated Solutions
Hi-Tech Security Solutions looks at what today’s security management platforms offer users from both small and large organisations.
- Changing the SMB VMS landscape
October 2017, Pelco by Schneider Electric, CCTV, Surveillance & Remote Monitoring, Integrated Solutions
Video surveillance innovations have changed the landscape for enterprise security with the ability to provide real-time monitoring, forensic investigations, risk mitigation and business operations management.
- Hikvision reaches new heights
October 2017, Hikvision South Africa, News, CCTV, Surveillance & Remote Monitoring, Perimeter Security, Alarms & Intruder Detection
Hikvision held an event to celebrate the launch of its perimeter defence solutions on 15 September on the 20th Floor of The Venue, Green Park.
- Arteco integrates with Hanwha Techwin
October 2017, News, CCTV, Surveillance & Remote Monitoring
Arteco announced that its Video Event Management and Video Intelligence Solutions are now compatible with the new Hanwha Techwin Wisenet 5 chipset.
- Milestone is all ears for audio
October 2017, Milestone Systems, News, CCTV, Surveillance & Remote Monitoring, Products
Milestone Systems has released Device Pack 9.3 which prepares the Milestone community for using audio to increase safety. In addition, more than 300 cameras have received updated or new support.
- Causes of fatigue
October 2017, Leaderware, This Week's Editor's Pick, CCTV, Surveillance & Remote Monitoring, Security Services & Risk Management
The security industry has many regulations, but in an industry where the type of work and other conditions lend themselves to fatigue, there is little on the handling of fatigue.
- Qognify secures global bank
October 2017, Security Services & Risk Management, CCTV, Surveillance & Remote Monitoring, Integrated Solutions
Qognify announced that one of the world’s largest banks and financial services companies has selected Qognify Situator and its Operational Intelligence Centre (OIC) module to help manage its global security ...
- Integrated mining surveillance
October 2017, Cathexis Technologies, Mining (Industry), CCTV, Surveillance & Remote Monitoring, Integrated Solutions
Gus Brecher, MD of Cathexis Africa and business development director of Cathexis Technologies, offers some insight into the challenges that securing mining operations poses.
- Security infrastructure in a box
October 2017, Genetec, CCTV, Surveillance & Remote Monitoring, IT infrastructure
Genetec introduces new high-performance rack-mounted appliances, workstations and storage solutions.
- Mirasys V8 launched
October 2017, Security & Communication Warehouse, CCTV, Surveillance & Remote Monitoring
The Mirasys VMS V8 is an open platform video management and visual intelligence solution that scales to different size environments.
- CNL releases IPSecurityCenter V5.5
October 2017, CCTV, Surveillance & Remote Monitoring, Integrated Solutions
CNL Software, a global Physical Security Information Management (PSIM) system software developer, has announced the release of IPSecurityCenter version 5.5.