Network camera apparatus, network camera server and digital video recorder for preventing forgery and alteration of a digital image, and apparatus for authenticating the digital image from said apparatus, and method thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Apr 15, 2004
app pub date -
Nov 12, 2003
filing date -
Dec 9, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention discloses a network camera apparatus, network camera server and digital video recorder which makes it possible to prevent a digital image from being forged or altered by embedding a watermark into an image signal input through a camera in a real time. Two types of watermark, i.e. a robust watermark for authenticating whether the image is original image or not and a fragile watermark whether the image is forged or altered or where the forgery or alteration of image takes place. An authentication apparatus for authenticating the watermark-embedded image is further disclosed.
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