Sunday, April 30, 2006

Duke Lacrosse (Time stamped "photos" real or fake?)

Nope. When you take a picture with a digital camera, the exact date and time of the shutter-release are recorded to your image file, along with many other bits of "metadata." Every time you take a picture, your camera will also save information about your exposure time, f-stop setting, ISO, focal length, and so on. (It will even store a second time stamp for the moment the image file gets written to your memory card?which usually happens just a few moments after you take the picture.) But the time stamps are only as accurate as the clock in your camera; if you forgot to set it an hour ahead for daylight savings, your metadata would be an hour off. You can also modify any of the metadata with a simple computer command if you have the right software.


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