Tutorials (187)

Displaying 'tutorials' tags 76 - 100 of 187 in total

Camera Coverage Areas

(Member Only)

How wide and far on an area can a camera cover?  A fundamental metric in analyzing this is pixel density (aka PPF or PPM). Three key factors contribute: Resolution of the camera (e.g., VGA, 720p, 1080p, 4K) Size of the area (e.g., a room, a r...

By John Honovich - over 4 years ago

Camera AoV / Focal Length Comparison

Use the IPVM Camera Calculator to better understand the tradeoffs between different Angle of Views (AoV) / focal lengths. The video below shows you how to do it: The two gifs below show you examples of different AoVs. First, for a doorway: ...

By John Honovich - almost 5 years ago

"Future-Proofing" Access Control Guide

(Member Only)

Its one of the most misused phrases around: "Future-proof". However, even without the crystal ball and wizards, designing access control to be "future proof" is much more pratical that the concept implies. The features we tag as 'future proof' ar...

By Brian Rhodes - about 5 years ago

Camera Edge Storage / Recording Tutorial 2015

(Member Only)

~70% of IP cameras allow storing video onboard, at the 'edge', typically through the use of SD cards. The big question is whether and when it makes sense to use edge storage / recording inside the IP camera. In this tutorial, we teach: Edge c...

By John Honovich - over 5 years ago

Resolution: 4K vs 2160p vs 8.3MP

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4K, 2160p and 8.3MP all basically refer to the same 'thing', just different dimensions of it. While total pixel count has historically been the most common technique (e.g., 1MP, 2MP, 3MP, 5MP, etc.), naming by vertical count (e.g., 720p and 1080p...

By John Honovich - over 5 years ago

TCP vs UDP for Video Surveillance

(Member Only)

TCP or UDP? What should you use for video surveillance? TCP and UDP are both in use in the video industry today, each with strengths and weaknesses when it comes to live viewing, playback, error correction, artifacting, and more, though many use...

By Ethan Ace - over 5 years ago

Electric Strike Installation Guide

(Member Only)

Follow this guide and you will install a strike correctly everytime. As we detail in this post, installing electric strikes successfully is mostly good preparation, but when done right provides years of trouble-free use. We use our test door to wa...

By Brian Rhodes - over 5 years ago

Camera DNR (Digital Noise Reduction) Guide

(Member Only)

Bandwidth spikes are a significant video problem. An IPVM study found 250 - 500% increase in bandwidth from day to night (see: Testing Bandwidth vs Low Light). Digital noise reduction is key for reducing night time bandwidth and preventing drama...

By Ethan Ace - almost 6 years ago

Elevator Surveillance Guide

Installing surveillance in an elevator can be challenging. Small but wide areas, vandal resistance, and transmission methods all present challenges not found in other areas cameras are installed. In this note, we look at: Form factor: Box vs. d...

By Ethan Ace - about 6 years ago

HD SDI / HDcctv Tutorial

Want megapixel but don't want IP? That's the promise of HD SDI / HDcctv. In this tutorial, we examine what it is, how it differs from IP Megapixel and the key factors impacting its use including backwards compatibility, product availability, VMS i...

By John Honovich - about 6 years ago

Frame Rate Guide for Video Surveillance

This is the industry's most in depth guide to frame rates in video surveillance. As a precursor, you need to know the speed of objects, most typically people. Speed of People The faster a person moves, the more likely you are to miss an action....

By John Honovich - about 6 years ago

Installing Door Hardware

Most access installers find themselves in this sticky situation at some point: they need to install or reinstall a door lock. The problem? Door lock installation is a whole world unto itself, and seemingly is fraught with hundreds of different pro...

By Brian Rhodes - almost 7 years ago

Pixels Determine Potential, Not Quality

Pixels = resolution = quality is not always true, since other factors impact quality (low light, bright light, lens quality, etc.).  However, pixels determine potential quality. In this note, we explain why you will make much clearer and better d...

By John Honovich - about 7 years ago

Disability Laws, ADA and Access Control

Designing safe Access Control is paramount for everyone, especially those working with disabilities. In the USA, a specific set of codes, the 'Americans with Disabilities Act', mandates that every commercial or public building accommodates those w...

By Brian Rhodes - about 7 years ago

Specifying Door Locks

Mechanical door locks regularly remain even after electronic access control is added. Indeed, most are designed to work with what is already hung on the door. However, what happens when a lock needs to be replaced or changed? Understanding the bas...

By Brian Rhodes - about 7 years ago

Door and Frame Alignment Primer

Effective access control is only as good as the doors being secured. Most designers and installers focus on great hardware and world-class systems, but they potentially negate those benefits by hanging them on flawed openings. The way the frame an...

By Brian Rhodes - about 7 years ago

Using Camera Output Power

Do you realize that your camera can power and integrate PIR sensors, accelerometers, lights, sirens and strobes? Camera input/output ports make direct integrations with other devices simple. Even though camera output voltages are modest - less th...

By Brian Rhodes - about 7 years ago

Access Control: Combo Reader / Controllers Tutorial

Economical or foolhardy? Industry professionals are torn on combination door readers. These units typically integrate credential readers and door controllers into a single unit hung outside the door. Does the tampering risk also mean they are a se...

By Brian Rhodes - about 7 years ago

Prox vs. iClass Explained

The differences between 'contactless' proximity credential formats are significant, yet the details are not well understood. Most access designers and users are familiar with 'Prox', but replacing them with 'iClass' has no real benefit... or does ...

By Brian Rhodes - over 7 years ago

VMS Multistreaming Comparison

With megapixel now mainstream, surveillance systems need to deal with unprecedented loads of live video display and recorded storage. One emerging technique for VMSes to handle this is using multistreaming. Three main benefits exist: Reducing ...

By Sarit Williams - over 7 years ago

Obtaining Copies of Government Contracts

Contracts for US public schools, airports, city, state and military security systems can typically be obtained. This can be extremely useful if you want to understand what was selected or who 'won' a project (see our reporting on contracts in Penn...

By Carlton Purvis - over 7 years ago

Proximity Readers Tutorial

One of the most common credentials is also the most confusing. How exactly do proximity cards 'read' into an electronic access system? Despite being widely used by more than a half-dozen 'contactless credential' types, that these credentials use n...

By Brian Rhodes - over 7 years ago

IPVM Camera Testing Procedures

The foundation of IPVM's camera testing procedure is simultaneous, head to head comparisons, like so: This is unique among surveillance industry publications. Each camera is placed side by side, with the same FoV, connected to the same VMS and...

By John Honovich - over 7 years ago

Focusing Panoramic Cameras

Focusing panoramic cameras is really important. Indeed, after testing 9 different panoramic cameras across many manufacturers, we believe this must be done manually for each camera. This might seem unnecessary as panoramic cameras are, after all, ...

By Ethan Ace - over 7 years ago

Mustering Tutorial

Access control can be used for more than just securing buildings. Among these powerful 'other' functions is mustering, which immediately accounts who is where in a building. However, a system has to be designed properly and carefully to use this. ...

By Brian Rhodes - over 7 years ago

Displaying 'tutorials' tags 76 - 100 of 187 in total