August 2019

Introduction to Network Video Camera Types August 2019

Network IP security cameras are the best choice for all end-users wishing to monitor their work, their homes, their properties, at the time when they can not be available at the exact place. So these cameras can serve their needs and provide them with an easy and remote monitoring and tracking the safety of their properties.

When you’re trying to choose the right IP camera you’ll begin to notice how many different types of cameras there are. Generally, network cameras can be divided into four types for different applications, including fixed, pan/tilt/zoom (PTZ), fixed dome and speed dome. You will need to determine what type of camera you want.

Here are some questions to ask yourself:

• Will your cameras be used indoors or out?

• Should it be a visual deterrent or discreet?

• Is there a particular look you prefer?

The requirements for cameras that operate indoors can be very different than those that are designed for an outdoor environment. The most obvious of these differences is one of climate and lighting.

This article help you to choose from a number of different factors to select a right type of camera. Each factor comes with its own unique strengths and weaknesses – both in terms of physical sizing and advanced features provided.

Fixed Type

A fixed network camera points in a fixed direction to monitor a specific area, such as hallways, staircases or corridors. Because people can be aware of the camera’s shooting direction, in some cases, it can deter vandalism and crimes. A fixed network camera usually comes with a RS-232/422/485 interface that connects the cameras to a pan/tilt scanner for wider coverage. Many fixed network cameras has exchangeable C/CS-mount lens design, giving users the ability to change the lens to adapt for different monitoring conditions.

Pan/Tilt/Zoom (PTZ) or Speed Dome Type

Capable of changing shooting direction horizontally and vertically to achieve a wide field of view, a pan/tilt network camera is used in many spacious areas, such as lobbies or parking lots. Some pan/tilt network cameras are integrated with zoom capability so as to provide close-up images of distant objects. Users can easily control PTZ functions through a web browser.

Fixed Dome Type

A fixed dome network camera, mostly designed for indoor surveillance, has a housing to make the object of interest less aware of where the camera is pointing at. With a 3-axis mechanism, images can remain in an upright orientation when it is installed either against the wall or on the ceiling. Furthermore, the design of a fixed dome network camera can better fit in with the decor. A fixed dome network camera can be furnished with a weather- or vandal-proof housing for outdoor applications

Outdoor/Indoor Cameras

As previously mentioned, the economical video surveillance solutions, like any electronic device, have longevity in milder climates and climate-controlled environments. It’s when installed outdoors in harsher climates that they fail to perform consistently. Professional video surveillance cameras, whether analog or IP, offer ruggedized outdoor enclosures or housings specifically designed to protect the camera from the elements and the imagery generated by those cameras.

These housings may include heaters, not only to keep the equipment warm in subzero temperatures, but also to prevent the dome or window from fogging up in cool and damp weather. The problem with the small, fixed LED IR cameras is the plastic used in front of the lens and in some cases, the actual lens. After a few years in the harsher climates, this plastic tends to fade and become milky. This makes it difficult for the CCD or CMOS sensor to successfully translate the imagery, and if there’s a series of LED IR lights surrounding the lens, it can cause a halo-like effect that blurs the image day and night. Indoors, these devices have a far longer life span, but outdoors, or even in a garage without climate control, many of them lose their sharpness and clarity succumbing to the harsh environment.

Fixed Versus Pan-Tilt-Zoom

A “fixed” camera is a still camera; it’s set to one position and is unable to move unless the lens is physically moved. A PTZ camera gives the operator the ability to move the camera lens using the VMS software. While a fixed camera can be more cost-effective, a PTZ camera expands the area of coverage beyond a single fixed point. Depending on how the camera is mounted, a PTZ camera can provide 360 degrees of coverage and more than 35x the zoom capabilities.

Another important consideration, outside of the network camera itself, is the selection of the network video product vendor. Since needs grow and change, the vendor should be seen as a partner, and a long-term one. This means that it is important to select a vendor that offers a full product line of network video products and accessories that can meet the needs now and well into the future. The vendor should also provide innovation, support, upgrades and product path for the long term. Once a decision has been made as to the required camera, it is a good idea to purchase one and test its quality before setting out to order quantities of it.

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