Technical thoughts:
Continue reading “Technical Jokes and Cartoons 6”Head to Head Comparison of Sony and Axis Dome IP Cameras
We are often asked, what is the best IP camera for my security or surveillance system? Over the last year, we tested a number of different IP cameras. We compared their published specifications and more importantly how they actually performed in our tests. We found that sometimes the less expensive camera can be a much better value.
In the following head to head test, we compared the Sony SNC-VM601 to the Axis P3384V. Both of these dome IP cameras have similar specifications and provide the latest wide dynamic range (WDR) capability. The test determined which camera provided the best value and performance.
We compared camera resolution, low light sensitivity, wide dynamic range, and actual usage in a specific application. Of course, these are not the only characteristics to consider, but we have found these to be the most important in many applications. Here are the results:
Continue reading “Head to Head Comparison of Sony and Axis Dome IP Cameras”How Motion Detection Works in IP Camera Systems
Many IP cameras include motion detection capability. It is also available using video management software (VMS) or a network video recorder (NVR). This is a very important analytic function because it controls when an alarm is triggered and when the video is recorded.
Motion detection seems to be a simple concept. All we do is compare one frame to another and look for things that change. For example, a moving white ball can trigger an alarm by comparing two frames.
Well, it isn’t that simple. The early engineers who worked on motion detection discovered that this was a difficult engineering problem. Back in the 1970’s, I worked on a project to detect moving particles in fluids. What I discovered was that it is sometimes difficult to discern the difference between a moving object and signal noise.
Continue reading “How Motion Detection Works in IP Camera Systems”What is the Right Sound Level for Your Paging Speakers?
Whether it’s an emergency announcement or page in a school, how do you determine the speaker and amplifier required for a specific location? IP paging systems can provide exactly the right sound level to exactly the right location, but what is the right sound level?
How loud does the emergency paging system need to be? How much sound is needed to hear an announcement in a classroom or in a sports field where there is a lot of background noise?
This article provides the technical background and practical information needed to help you determine the right power and speakers required.
Technical Jokes and Cartoons 5
Actually many of these jokes are not really technical, but us tech guys think they’re funny…
Answering machine message,
“I am not available right now, but thank you for caring enough to call.
I am making some changes in my life. Please leave a message after the beep.
If I do not return your call, you are one of the changes.”
In Cases of Emergency
An emergency once set in motion, can not be taken back. All we can do is assess the situation, spread the word, then throw roadblocks in its way. No one knows this better than those responsible for school safety.
Whether it’s the principal, vice-principal, or security officer, all he or she can do when an emergency looms is is learn as much as he/she can, and based on the specific situation, alert teachers and students in classrooms – and oh, yes, hope that the countless hours spent in repetitive fire, evacuation, or lock-down drills have taken root.
The good news is that if the school is protected by an IP Physical Security System, they’ll have a head start.
Continue reading “In Cases of Emergency”VCA and Safe/Smart Cities: Applications of the Future
Cities are getting smarter and safer, thanks to VCA and video surveillance. But before we get started, let’s define the difference between VMS and VCA which is actually a trick question since Video Content Analysis (VCA) stems from algorithms written into Video Management Software (VMS).
Also, known as Video Analysis, VCA analyzes streaming surveillance video to detect spatial and temporal events.
The earliest applications were used to alert security personnel to the real time presence of intruders, loiterers, unattended packages, and cars in a no park zone.
Continue reading “VCA and Safe/Smart Cities: Applications of the Future”Surveillance News Flash!
It’s always rewarding to find that one of the technologies we specialize in has been cited in a story. Wednesday, November 12 was just such a day.
An article in The Journal News which covers our area, New York’s lower Hudson Valley bore the headline Harrison Cops Bust Cul-de-sac Burglary Ring.
The arrests came after a two-month long investigation by the Harrison, NY Police, the Westchester County District Attorney’s Organized Crime Division, and the Special Investigation Squad of the Bergen County, NJ Prosecutor’s Office into what grew to be twenty-five break-ins in the tri-state area. The burglary ring would strike the expensive homes between 10 AM and 1 PM, when no one appeared to be at home, to steal jewelry and other property, often hauling away safes that contained them.
Seven burglary suspects were taken into custody as well as a Diamond District Dealer who was acting as ring leader and “fence.” The capture could not have happened without the cooperative effort of the three agencies who trailed the suspects for weeks into nearby New York, Connecticut, and New Jersey, using the latest forensic technology to obtain evidence – video from IP security cameras, and information obtained from police license plate readers.
Continue reading “Surveillance News Flash!”Technical Jokes and Cartoons 4
“Lexophile” is a word used to describe those who have a love for words, such as “you can tune a piano, but you can’t tuna fish”, or “to write with a broken pencil is pointless.” Here are some examples:
When fish are in schools, they sometimes take debate.
A thief who stole a calendar got twelve months.
When the smog lifts in Los Angeles U.C.L.A.
The batteries were given out free of charge.
A dentist and a manicurist married. They fought tooth and nail.
A will is a dead giveaway.
With her marriage, she got a new name and a dress.
A boiled egg is hard to beat.
When you’ve seen one shopping center you’ve seen a mall.
Police were called to a daycare center where a three-year-old was resisting a rest.
Continue reading “Technical Jokes and Cartoons 4”Digital Doorman on Duty
One of the draws of the luxury apartment buildings on New York’s Park and Fifth Avenues has been the access control provided by uniformed doormen; trusted employees who know every resident by sight and can be counted on to screen all visitors and grant them access only after announcing them and gaining permission over the apartment’s intercom.
The cost for such security: co-op and condo prices that reach into the two-digit millions. But there’s an alternative for those of us who cannot afford to live in such luxury – a digital doorman.