Looking back, Pan Tilt Zoom (PTZ) cameras have come a long way. As technology as has advanced, PTZ cameras have decreased in size and weight while offering even better features and functions.
These high-quality PTZ cameras are ideal for monitoring large, open spaces both indoors and outdoors. Some examples include casino, malls, airports, and stadiums, where effective and efficient surveillance is necessary.
As with any security system, selecting the right PTZ camera system comes down to individual security needs. Here are some important features to consider when choosing PTZ cameras.
Video Analytics
Now nearly all PTZ systems are equipped with video analytics which provide numerous benefits:
Auto-Tracking
Arguably one of the most valuable features of PTZ cameras, auto-tracking controls the PTZ actions of a camera to automatically track (keep in field of view) an object in motion. This can be triggered manually or automatically by defined rules. Once a rule is triggered, the camera automatically zooms in and tracks the defined target.
Advanced Video Compression
The H.265 compression standard enables much higher compression ratios with lower bandwidth and storage requirements than before, providing higher resolution images and deeper systems integration. However, optimized implementations of the H.265 codec are emerging, like the Smart H.265+. In comparison to the standard h.265 video compression, Smart H.265+ reduces bit rate and storage requirements by up to 30 percent.
High-Definition Video Over Coax
Legacy coax systems can be easily upgraded to HD video using existing analog infrastructure thanks to HD video over coax. With this option, there is no latency in system responsiveness and no video compression, so the images maintain a high level of detail without stretching or distortion. In addition, there is no need to install a separate cable to control PTZ since coaxial cable allows for bidirectional data transfer. Overall, this is a cost-effective way to upgrade PTZ cameras.
Infrared (IR) Illumination
With PTZ cameras, IR illumination is applied as needed. There is usually an array of three distinct areas of infrared illuminators – each with a different angle of dispersion for the IR light: wide angle, telephoto, and interim angle.
As an example, when an operator optically zooms in from wide angle to telephoto, IR illuminator LEDs will turn on and off to provide the appropriate illumination. And when the camera is in zoom mode, it adjusts the IR illumination so that the system is not flooding the entire 120-degree view. These automatic modifications illuminate the area in view, producing better video and reducing the amount of power required.
Video Quality Expectations
Zoom Factor vs. Focal Length – Keep in mind that a higher zoom factor does not always provide a better video image. The focal length of the lens will provide a better indication of what is appropriate for an application.
Plastic vs. Glass – Remember not all lower domes (the protective housing at the bottom of a PTZ camera) are the same. While most manufacturers use a plastic lower globe to protect the camera and optics, this can offer a lower degree of optical clarity. As the camera pans up toward the horizon, it begins to view through the globe in areas where it has the least uniformity (where most optical distortions can occur).
Glass lower globes (or a flat piece of glass, as provided by some companies) are more optically pure and consistent in comparison. These glass coverings enable dome systems to feature higher resolution sensors and longer optical zooms thanks to their clear and consistent nature.
Some modified lower dome designs allow for above-the-horizon viewing – ideal for those who need to monitor rough terrain or scenes on different planes of view.
Thinking about installing a PTZ system on your property? We carry a great collection of quality PTZ security cameras. Browse our stock online or call 888-203-6294 to request a site survey, free quote, or inquire about our installation services. Connect with us on Facebook, Google+, Twitter, LinkedIn, and Pinterest.