Business

Chinese snooping tech spreads to nations vulnerable to abuse

When hundreds of video cameras with the power to identify and track individuals started appearing in the streets of Belgrade as part of a major surveillance project, some protesters began having second thoughts about joining ...

Security

Akamai speaks out on uptick of DDoS attacks

Internet security's big bully: Distributed Denial of Service (DDoS) which messes up normal traffic of a targeted server or network with a flood of HTTP requests, malformed packets. Crash, bam boom. Missions accomplished. ...

Security

Website rates security of internet-connected devices

If you're in the market for an internet-connected garage door opener, doorbell, thermostat, security camera, yard irrigation system, slow cooker—or even a box of connected light bulbs—a new website can help you understand ...

Security

NY state police lag behind agencies nationwide on camera use

A highway shoulder is where New York state troopers spotted Luke Patterson, walking by himself around 2 a.m. after his car became disabled. By the end of the encounter in rural New York, the 41-year-old chef would be killed ...

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Camera

A camera is a device that records images, either as a still photograph or as moving images known as videos or movies. The term comes from the camera obscura (Latin for "dark chamber"), an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.

Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera's opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.

A typical still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button.

This text uses material from Wikipedia, licensed under CC BY-SA