Video camera
hideA video camera is a camera used for electronic motion picture acquisition, initially developed by the television industry but now common in other applications as well. The earliest video cameras were those of John Logie Baird, based on the electromechanical Nipkow disk and used by the BBC in experimental broadcasts through the 1930s. All-electronic designs based on the cathode ray tube, such as Vladimir Zworykin's Iconoscope and Philo T. Farnsworth's Image dissector, supplanted the Baird system by the 1940s and remained in wide use until the 1980s, when cameras based on solid-state image sensors such as CCDs (and later CMOS active pixel sensors) eliminated common problems with tube technologies such as burn-in and made digital video workflow practical.
Video cameras are used primarily in two modes. The first, characteristic of much early television, is what might be called a live broadcast, where the camera feeds real time images directly to a screen for immediate observation; in addition to live television production, such usage is characteristic of security, military/tactical, and industrial operations where surreptitious or remote viewing is required. The second is to have the images recorded to a storage device for archiving or further processing; for many years, videotape has been the primary format used for this purpose, but optical disc media, hard disk, and flash memory are all increasingly used. Recorded video is used not only in television and film production, but also surveillance and monitoring tasks where unattended recording of a situation is required for later analysis.
Modern video cameras have numerous designs and uses, not all of which resemble the early television cameras.
For more information about Video camera, read the full article at
Wikipedia.
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News tagged with video camera
Gadgets: WD media player makes watching your own HD video easier
Electronics / Consumer & Gadgets
Oct 22, 2009 |
3 / 5 (1) |
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Producing your own high-definition video has become increasingly easier with today's line of HD video cameras. But transferring the content from your computer to a TV can be a challenge.
Findings about veracity of peripheral vision could lead to better robotic eyes (w/ Video)
Oct 15, 2009 |
4 / 5 (3) |
1
Two Kansas State University psychology researchers have found that although central vision allows our eyes to discern the details of a scene, our peripheral vision is most important for telling us what type of scene we're ...
Video camera that records at the speed of thought
Oct 12, 2009 |
4.2 / 5 (13) |
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(PhysOrg.com) -- European researchers who created an ultra-fast, extremely high-resolution video camera have enabled dozens of medical applications, including one scenario that can record 'thought' processes travelling along ...
YouTube views over one billion a day: co-founder
Oct 09, 2009 |
5 / 5 (1) |
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The number of video views a day on YouTube has surpassed one billion, the co-founder of the wildly popular video-sharing site said Friday on the third anniversary of its acquisition by Google.
Gadgets: Kodak Zi8 takes great video for under $200
Electronics / Consumer & Gadgets
Oct 07, 2009 |
2.5 / 5 (2) |
2
Kodak's Zi8 video camera is outstanding, but to me what makes it great compared to similar models from other manufacturers is the unlimited amount of storage.
Filming photons, one million times a second
Oct 05, 2009 |
4.7 / 5 (9) |
0
(PhysOrg.com) -- European researchers have created a CMOS (semiconductor) camera capable of filming individual photons one million times a second. The breakthrough will impact on all the most advanced areas ...
Nano changes make it a fun little gadget
Electronics / Consumer & Gadgets
Sep 23, 2009 |
4 / 5 (3) |
0
There really wasn't much Apple needed to do to its iPod nano, which the company claims is the world's best-selling MP3 player.
Secrets of insect flight revealed
Sep 17, 2009 |
4.4 / 5 (8) |
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(PhysOrg.com) -- Researchers are one step closer to creating a micro-aircraft that flies with the manoeuvrability and energy efficiency of an insect after decoding the aerodynamic secrets of insect flight.
iPod Nano to come with video camera
Electronics / Consumer & Gadgets
Sep 09, 2009 |
4 / 5 (1) |
0
Apple announced on Wednesday that it was adding a video camera to its iPod Nano and cutting prices of its wildly popular music players.
First half of September brings a whirlwind of cool, new gadgets
Electronics / Consumer & Gadgets
Aug 20, 2009 |
not rated yet |
0
There's a whole lot of neat tech scheduled to be released or announced during that time frame.
Big tech push on campus; Portability is a major issue as laptops, phones in demand
Aug 06, 2009 |
4 / 5 (1) |
0
With summer in full swing, the last thing on many students' minds is going back to school.
iPhone 3G S has slew of new features
Electronics / Consumer & Gadgets
Jul 08, 2009 |
3.3 / 5 (11) |
2
If you've been thinking of buying an iPhone, the release of the iPhone 3G S makes it a lot easier to join Apple's telecom family. But if you already own an iPhone, deciding whether to buy this new model is ...
Sound imaging: clever acoustics help blind people see the world (w/ Video)
Jul 02, 2009 |
4 / 5 (1) |
1
(PhysOrg.com) -- Video from portable cameras is analysed to calculate the distance of obstacles and predict the movements of people and cars. This information is then transformed and relayed to a blind person ...
Biology knows best -- human-like vision lets robots navigate naturally
Jun 30, 2009 |
4.5 / 5 (4) |
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(PhysOrg.com) -- A robotic vision system that mimics key visual functions of the human brain promises to let robots manoeuvre quickly and safely through cluttered environments, and to help guide the visually impaired.
A Glimpse of the Future MEMS-based Storage: Totally Green & Thumbnail Size
Jun 23, 2009 |
4.2 / 5 (13) |
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The University of Twente--Enschede, The Netherlands published newly conferred PhD Mohammed Ghiath Khatib's thesis, "MEMS-based Storage Devices: Integration in Energy-Constrained Mobile System". The new MEMS, ...
