Sony is introducing SNR1s [lx] as an index used to quantitatively evaluate picture quality at low illumination. SNR1s [lx] is a proprietary index advocated by Sony, and is limited to CMOS image sensors for security camera applications.A smaller value indicates better picture quality at low illumination.SNR1s [lx] is an acronymContinue Reading
By William Turton – Bloomberg News A group of hackers say they breached a massive trove of security-camera data collected by Silicon Valley startup Verkada Inc., gaining access to live feeds of 150,000 surveillance cameras inside hospitals, companies, police departments, prisons and schools. Companies whose footage was exposed include carmaker TeslaContinue Reading
By Patrick MaloneSeattle Times staff reporter At street corners across downtown Seattle, eye-catching public art dresses up drab metal boxes full of the electronic guts that operate traffic signals. But there’s something more to these gussied-up casings. Across the top of hundreds of them are flat black discs the sizeContinue Reading
Author: Elizabeth Montalbano TALON, a network of smart, connected security cameras developed by the Atlanta-based startup and installed by law enforcement around the country, raises surveillance-related privacy concerns. While controversy over the potential overreach of neighborhood and law-enforcement video surveillance has focused mainly on Ring, an Atlanta-based startup has quietlyContinue Reading
Several countries around the world use closed-circuit television (CCTV) videos as forensic evidence to combat crime. These cameras cover large fields of view, where low-resolution facial images are typically captured, making the identification of the subject of interest very difficult. A group of researchers at the University of Malta isContinue Reading
Top ten installation challenges A successful camera installation requires careful consideration. Which cameras should you choose? How should they be installed? In this ten-step guide we will describe some of the challenges you might encounter during installation, and how to deal with them. We’ll guide you through areas such asContinue Reading
Image quality Setting up successful video surveillance requires attention to many details. The ultimate goal is to provide images of sufficient quality to support your surveillance objective – but what is image quality, and how do you adjust your camera to achieve your goal? Light The basic principle behind mostContinue Reading
Identification and Recognition Does your surveillance project need to identify or recognize persons? Do you need to identify objects such as license plates? If so, you will not only need to capture the scene at a sufficient resolution, but also take into account factors such as illumination, camera positioning andContinue Reading
Power Basics : Watts, VARs and VA The difference between VA and Watts.The purpose of this Tech Note is to clear up a common misunderstandingabout the measurement of power in alternating current (AC) circuits. Most people with electrical experience have heard that power equals amps times volts. This is alwaysContinue Reading
What is Coaxial Cable? Coaxial cable, sometimes known as coax cable, is an electrical cable which transmits radio frequency (RF) signals from one point to another. The technology has been around since the early 20th century, with these cables mainly being used to connect satellite antenna facilities to homes andContinue Reading
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