Sunday, July 10, 2011

From the "infrared door" to see the infrared shooting DV

Recently, the Olympics, "Infrared Gate" Guo Jingjing recent perspective piece swimsuit the matter is again making waves online. Why is that non-German photographed using infrared film can function "perspective" swimsuit it? Can the parties as an athlete or other methods through the dress, let photographed succeed it? We analyze the sub-articles to the outside shooting DV can not "perspective" people's clothes.
Infrared shooting DV
Around 1999, I purchased a Sony Digital8 format that D8 model DCR-TRV210E camera, the infrared shooting with the machine, the machine has a Nightshot also known as "night shot" or "night vision" switch, the switch is open, you can shoot in very dark environment to a more clear picture, but the picture is not black and white color. Later in 2004, bought a Panasonic DVC-33 Digital DV, the machine also has this "infrared night vision" feature, the "infrared" feature combined with a slow shutter technology, can be pitch-dark night in the shooting. Two days before the one we just made "Canon XF105 and XF100 features seven" article, Canon also introduced the latest release of XF105 and XF100 has "infrared shooting" feature.
 Active principle of infrared camera technology
We first look around the type of infrared camera, infrared camera about two, one is "active infrared camera technology", the other is "passive about outside the camera technology." We mentioned above, several models are "active infrared shooting", that is, active infrared camera technology is the use of special "infrared light" man-made produce infrared radiation, with infrared cameras record video feature watch these people irradiated by infrared light invisible objects. This infrared radiation of infrared light, the human eye can not see, such as we often use the TV remote, press the button, by remote control infrared light to send the TV remote control commands, but we do not will be issued from the remote control to see the light, because the human eye can not see infrared light, so only "infrared" and "Ultraviolet," saying that we humans can only see "red" and "Purple "within the light, but the camera's CCD image sensor can capture infrared light, CCD not only can" see "the light we can see, but also" see "we do not see the light.
 DV principle of infrared
In fact, the above said, we basically understand how it was a child. With infrared shooting of DV, or other location at the bottom of the lens to protect the red hood, equipped with a set of infrared night vision devices (two or more infrared light-emitting unit), can be opened without any light shooting conditions to obtain a clear black and white images. Built-in infrared night vision devices for the effective range of about 3-5 meters, while the optional high-power infrared light photography the maximum effective range of up to 30 meters, such as the above mentioned Panasonic DVC33 on this accessory, you can burst News, shooting wildlife and public security and other special industry provides a professional image acquisition tool for all-weather activities.

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