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
First Claim
Patent Images
1. A network camera apparatus comprising:
- an image inputting portion for receiving an image signal photographed in real time;
an image data processing portion for converting the image signal outputted from said image inputting portion to a digital signal;
an information generating portion for generating an information to be embedded as a watermark;
a watermark generating portion for generating the watermark using the information of said information generating portion;
a watermark embedding portion for embedding the watermark generated at said watermark generating portion into the image signal outputted from said image data processing portion;
an image compressing portion for compressing the watermark-embedded image signal outputted from said watermark embedding portion; and
a network connecting portion for transmitting the compressed image signal outputted from said image compressing portion through network.
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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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Citations
32 Claims
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1. A network camera apparatus comprising:
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an image inputting portion for receiving an image signal photographed in real time;
an image data processing portion for converting the image signal outputted from said image inputting portion to a digital signal;
an information generating portion for generating an information to be embedded as a watermark;
a watermark generating portion for generating the watermark using the information of said information generating portion;
a watermark embedding portion for embedding the watermark generated at said watermark generating portion into the image signal outputted from said image data processing portion;
an image compressing portion for compressing the watermark-embedded image signal outputted from said watermark embedding portion; and
a network connecting portion for transmitting the compressed image signal outputted from said image compressing portion through network. - View Dependent Claims (2, 7, 8, 9)
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3. A network camera apparatus comprising:
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an image inputting portion for receiving an image signal photographed in real time;
an image data processing portion for converting the image signal outputted from said image inputting portion to a digital signal;
an image compressing portion for compressing the image signal outputted from said image data processing portion;
an information generating portion for generating an information to be embedded as a watermark;
a watermark generating portion for generating the watermark using the information of said information generating portion;
a watermark embedding portion for embedding the watermark generated at said watermark generating portion into the image signal outputted from said image compressing portion; and
a network connecting portion for transmitting the watermark-embedded image signal outputted from said watermark embedding portion through network. - View Dependent Claims (4)
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5. A network camera apparatus comprising:
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an image inputting portion for receiving an image signal photographed in real time;
an image data processing portion for converting the image signal outputted from said image inputting portion to a digital signal;
an information generating portion for generating an information to be embedded as a watermark;
a watermark generating portion for generating the watermark using the information of said information generating portion;
a first watermark embedding portion for embedding a first watermark generated at said watermark generating portion into the image signal outputted from said image data processing portion;
an image compressing portion for compressing the first watermark-embedded image signal outputted from said first watermark embedding portion;
a second watermark embedding portion for embedding a second watermark generated at said watermark generating portion into the compressed image signal outputted from said image compressing portion; and
a network connecting portion for transmitting the second watermark-embedded image signal outputted from said second watermark embedding portion through network. - View Dependent Claims (6)
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10. A method for embedding a watermark into an image signal photographed through network camera apparatus and transmitting the image signal to a network, said method comprising the steps of:
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converting an image signal inputted in real time to a digital signal;
embedding a robust watermark containing a unique information of the network camera apparatus into the converted image signal;
compressing the robust watermark-embedded image signal;
embedding a fragile watermark containing an arbitrary information transmitted from a distant place through network into the compressed image signal; and
transmitting the watermark-embedded image signal through network.
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11. A network camera server comprising:
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a plurality of image data processing portions for converting each of image signals inputted from a plurality of cameras in real time to a digital signal;
an information generating portion for generating an information to be embedded as a watermark, said information corresponding to each of image signals;
a watermark generating portion for generating each of watermarks corresponding to each of the image signals using the information of said information generating portion;
a plurality of watermark embedding portions for embedding respectively the watermark generated at said watermark generating portion into each of image signals outputted from said plurality of image data processing portions;
an image compressing portion for compressing respectively the watermark-embedded image signals outputted from said plurality of watermark embedding portions;
an image signal combining portion for combining the plurality of image signals outputted from said image compressing portion into a single image signal; and
a network connecting portion for transmitting the combined image signal outputted from said image signal combining portion through network. - View Dependent Claims (12, 17, 18, 19)
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13. A network camera server comprising:
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a plurality of image data processing portions for converting each of image signals inputted from a plurality of cameras in real time to a digital signal;
an image compressing portion for compressing respectively the image signals outputted from said plurality of image data processing portions;
an information generating portion for generating an information to be embedded as a watermark, said information corresponding to each of image signals;
a watermark generating portion for generating each of watermarks corresponding to each of the image signals using the information of said information generating portion;
a plurality of watermark embedding portions for embedding respectively the watermark generated at said watermark generating portion into each of image signals outputted from said image compressing portions;
an image signal combining portion for combining the plurality of watermark-embedded image signals outputted from said plurality of watermark embedding portions into a single image signal; and
a network connecting portion for transmitting the combined image signal outputted from said image signal combining portion through network. - View Dependent Claims (14)
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15. A network camera server comprising:
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a plurality of image data processing portions for converting each of image signals inputted from a plurality of cameras in real time to a digital signal;
an information generating portion for generating an information to be embedded as a watermark, said information corresponding to each of image signals;
a watermark generating portion for generating each of watermarks corresponding to each of the image signals using the information of said information generating portion;
a plurality of a first watermark embedding portions for embedding respectively a first watermark generated at said watermark generating portion into each of image signals outputted from said plurality of image data processing portions;
an image compressing portion for compressing respectively the watermark-embedded image signals outputted from said plurality of first watermark embedding portions;
a plurality of a second watermark embedding portions for embedding respectively a second watermark generated at said watermark generating portion into each of image signals outputted from said image compressing portion;
an image signal combining portion for combining the plurality of watermark-embedded image signals outputted from said plurality of second watermark embedding portions into a single image signal; and
a network connecting portion for transmitting the combined image signal outputted from said image signal combining portion through network. - View Dependent Claims (16)
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20. A method for embedding watermark into a plurality of image signals inputted from a plurality of cameras and transmitting the image signals to a network, said method comprising the steps of:
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converting said plurality of image signals inputted from said plurality of cameras in real time to digital signals;
embedding a robust watermark containing a unique information of the plurality of cameras or the network camera server into each of the converted image signals in real time;
compressing the robust watermark-embedded image signals respectively;
embedding a fragile watermark containing an arbitrary information transmitted through network into each of the compressed image signals in real time;
combining the plurality of the fragile watermark-embedded image signals into a single image signal; and
transmitting the combined image signal through network.
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21. A digital video recorder which comprises a watermark embedding apparatus for embedding watermark into a plurality of image signals inputted from a plurality of cameras, said watermark embedding apparatus comprising:
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a plurality of image data processing portions for converting each of image signals inputted from a plurality of cameras in real time to a digital signal;
an information generating portion for generating an information to be embedded as a watermark, said information corresponding to each of image signals;
a watermark generating portion for generating each of watermarks corresponding to each of the image signals using the information of said information generating portion;
a plurality of a first watermark embedding portions for embedding respectively a first watermark generated at said watermark generating portion into each of image signals outputted from said plurality of image data processing portions; and
an image signal combining portion for combining the plurality of watermark-embedded image signals outputted from said plurality of the first watermark embedding portion into a single image signal, wherein the image signal outputted from said image compressing portion is compressed and then recorded. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method for embedding a watermark into a plurality of image signals inputted from a plurality of cameras and recording the image signals, said method comprising the steps of:
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converting said plurality of image signals inputted from said plurality of cameras in real time to digital signals;
embedding a robust watermark containing a unique information of the plurality of cameras into each of the converted image signals in real time;
embedding a fragile watermark containing an arbitrary information transmitted through network into each of the robust watermark-embedded image signals in real time;
combining the plurality of the fragile watermark-embedded image signals into a single image signal; and
compressing the combined image signal and then recording the image signal.
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28. A digital video recorder for recording a plurality of image signals inputted from a plurality of cameras,
wherein a plurality of watermark embedding apparatus are respectively installed in said plurality of cameras in a separate manner, and each of the watermark embedding apparatus comprises: -
an image data processing portion for converting the image signal inputted from corresponding camera in real time to a digital signal;
an information generating portion for generating information to be embedded as a watermark;
a watermark generating portion for generating the watermark using the information of said information generating portion; and
a first watermark embedding portion for embedding a first watermark generated at said watermark generating portion into the image signal outputted from said image data processing portion, wherein the image signal outputted from said first watermark embedding portion is compressed and then recorded. - View Dependent Claims (29, 30, 31, 32)
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Specification