Video surveillance consists of remotely monitoring public or private places, using mostly power- operated cameras that transmit the images taken to monitoring equipment that records or reproduces the images on a screen. It captures images of moving people in order to monitor entry and exit, prevent theft, assault and fraud, as well as manage incidents and crowd movements.
Faced with problems such as the fight against terrorism, enhanced national security and the rapid development of city crime, our societies are increasingly investing in protection.
Digitalization and IP networking are transforming the way that video surveillance and monitoring is used. An open platform IP video surveillance management solution also enables greater integration between security systems such as an access control card reader and your surveillance cameras. Different verticals of operation are increasingly looking to IP network video to improve the performance of their video surveillance and video-enabling their operations.
One of the most difficult and expensive aspects of video surveillance has always been the need to have people monitor the cameras. Without someone watching what the cameras are recording, there’s no opportunity for immediate intervention or action.
Here, video analytics plays a very important role. Video analytics enables video surveillance to do the watching and become a proactive tool that signals the need for immediate intervention by guards, police, or other personnel.
By having video analytics watch an entry, you can reduce manpower while increasing accuracy. For example, if two people gain access by one card (tailgating), video analytics can alert a patrolling guard or central command station and provide a video clip for identification of the unauthorized person.
Instead of filling up hard drives with “mystery” video no one has the time to view. Video analytics can turn surveillance video into a tool that organizations can profit from, for everything from research to improving operational efficiency.
Video analytic capabilities include:
• Character (e.g., alphanumeric) and inscription recognition for reading license plates, name tags, and containers
• Facial recognition
• Density of people, people counts, behaviour (such as loitering, fighting, reading, sampling), slip- and-fall detection, gang activity, tailgating (vehicle or human) in restricted areas, a person coming over a fence
• Object removal and tracking
• Smoke detection
• Pattern recognition and directional motion
• Tampering (such as with ATMs or other devices)
• Illegally parked cars, unattended bags, spills
• Camera sabotage or malfunction
Wiring was the traditional answer but it’s no longer the only option.
The current wireless technological advancements in video surveillance are bound to shape the future.
Wireless technology provides a number of benefits over wiring, including:
• Cost-effectiveness and installation speed
Wireless networks are an important component of video surveillance systems enabling the installation of cameras anywhere they are needed without having to run cables or fibre. When designing the wireless network the question of how much bandwidth will be needed is going to come up. It’s not a simple question to answer and more bandwidth always translates into more radios. So getting a solid estimate of bandwidth requirements up front will ensure not only excellent performance, but excellent performance within the budget.
Surveillance and other video applications are bandwidth -intensive, providing adequate bandwidth is always going to be an important challenge.
Network bandwidth and storage requirements are important considerations when designing a video surveillance system. The factors include the number of cameras, the image resolution used, the compression type and ratio, frame rates and scene complexity. Network video products utilize network bandwidth and storage space based on their configuration.
The H.264 compression format is by far the most efficient video compression technique available today. Without compromising image quality, an H.264 encoder can reduce the size of a digital video file by more than 80% compared with the Motion JPEG format and as much as 50% more than with the MPEG-4 (Part 2) standard. This means much less network bandwidth and storage space are required for an H.264 video file.