Video Surveillance: 10 Questions to Ask in Deploying Video Analytics

What you need to know to deploy analytics right


Systems that require extensive manual calibration and setup will be more difficult and expensive to maintain over time. Many times users only realize their system needed additional calibration after a theft or event has occurred.

 

8. What are the camera placement restrictions?

Restrictions on camera placement locations can affect the design. Sometimes these restrictions are governed by other site safety criteria, as in refinery or electrical substation sites, other times they are simply a cost trade-off. It’s important to know beforehand if there are any site-specific criteria that will limit camera placement options.

 

9. What’s the Internet connectivity at the protected premises?

Video analytics are typically deployed in scenarios where there is some kind of live monitoring, either by a third party central station or end user. In order for events to reach the operators in a timely manner and for those operators to view video or interact via audio talk-down, you will need Internet connectivity at the site. Alarm sending and live video viewing rely on the upstream bandwidth (data going out of the site), which is usually lower than the downstream bandwidth and frequently glossed over in ISP specs. Ensure that the upstream bandwidth can sustain at least 500Kbps, and that the data usage contracts do not limit usage. A typical site will use about 4 to 8GB per month in data transfer, assuming six cameras and a moderate amount of activity and live viewing. Static IPs for the Internet connection are not strictly required, but will make life easier. Many ISPs offer a static IP option for around $10 or $20 per month; it’s a wise choice if that option is available.

 

10. What options are available to handle false alarms?

A good analytics system can do more than simply classify objects as “yes” or “no.” Ideally we strive for zero false alarms, but there are a wide variety of scenarios encountered and better/more accurate configuration options can help. You should have precise control over Regions of Interest (the actual part of the field of view where the analytics are applied), the ability to distinguish objects by type (person vs. vehicle) and the ability to have different rules and regions active based on the time of day or the day of the week. This will help ensure the system is not inadvertently triggered by nuisances like animals or by employees during normal working hours.

 

Brian Karas is the director of Field Engineering for VideoIQ Inc., based in Bedford, Mass.