Security camera basics: motorized zoom lens vs manual varifocal lens
Today, security camera manufacturers can provide HD security cameras come with motorized zoom lenses. Compared with the conventional manual vari-focal lens, a camera has the motorized zoom lens can automatically adjust the focal length of camera to get clear auto focused image. This makes security camera installation become much quicker and easier. Additionally, the motorized zoom lens can be controlled through Zoom/Focus buttons on web interface, smartphone App, or even the Joystick PTZ controller (RS485).
What is the advantage of motorized zoom lens?
If the video surveillance projects require installing multiple security cameras, choosing the cameras equipped with motorized zoom lens can significantly reduce […]
Che cos’è Video Balun?
A Video Balun enables the transmission of video using unshielded twisted pair wire instead of coaxial cable. The word “balun” comes from combining the terms balanced and unbalanced. The function of a balun is to transform an unbalanced signal into a balanced signal. When video signal is transmitted through coaxial cable, the distance traveled by the signal is limited because the signal is in the form of an unbalanced signal that is susceptible to Radio Frequency Interference or noise. Coax cable incorporates special shielding to minimize noise.
Video Baluns transform the video signal into a balanced form in which each wire […]
Auto-tracking IP PTZ Camera
Some advanced IP PTZ cameras can support auto-tracking function, therefore they usually are called “Smart” PTZ cameras. Auto-tracking means the camera can automatically track the moving objects, meanwhile auto zoom in/out and incorporating the auto-focus to get the clear image. As you may guess, the auto-tracking function works great when it monitors low-traffic areas, the applications including parking lots and museums, as well as the non-working time surveillance of schools, stores, construction sites.
How auto tracking works?
Typically, the PTZ camera includes a auto-tracking module which has embedded with special software based on image frame analysis algorithm. Users also can use the mouse […]