Method of steganographically embedding geo-location data in media
First Claim
1. A method of steganographically embedding auxiliary data in imagery comprising:
- receiving imagery including a first geolocation estimate steganographically embedded therein, wherein the first geolocation estimate corresponds to at least one area depicted in the imagery;
determining a second geolocation estimate, the second geolocation estimate comprising a more precise geolocation estimate, relative to the first geolocation estimate, for the at least one area depicted in the imagery; and
steganographically embedding the second geolocation estimate in the imagery.
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Abstract
Digital watermarking technology is used in conjunction with map data, such as is acquired by satellite and other aerial sensors, and as may be generated from databases based on such aerial data. For example, an image including steganographically hidden location data is analyzed and a refinement to the location data is made. The refined location data is then steganographically hidden in the image. In one implementation a method of steganographically embedding auxiliary data in imagery is provided. The method includes receiving imagery including a first geolocation estimate steganographically embedded therein. The first geolocation estimate corresponds to at least one area depicted in the imagery. The method further includes determining a second geolocation estimate, the second geolocation estimate comprising a more precise geolocation estimate, relative to the first geolocation estimate, for the at least one area depicted in the imagery, and steganographically embedding the second geolocation estimate in the imagery.
217 Citations
20 Claims
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1. A method of steganographically embedding auxiliary data in imagery comprising:
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receiving imagery including a first geolocation estimate steganographically embedded therein, wherein the first geolocation estimate corresponds to at least one area depicted in the imagery; determining a second geolocation estimate, the second geolocation estimate comprising a more precise geolocation estimate, relative to the first geolocation estimate, for the at least one area depicted in the imagery; and steganographically embedding the second geolocation estimate in the imagery. - View Dependent Claims (2, 3, 12, 13, 14, 17, 18, 20)
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4. A method comprising:
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receiving an image including first geographic information steganographically embedded therein, wherein the first geographic information corresponds to at least one location depicted in the image; determining second geographic information, the second geographic information comprising a refinement relative to the first geographic information for the at least one location depicted in the image; and steganographically embedding the second geolocation estimate in the imagery. - View Dependent Claims (5, 6, 7, 15, 16, 19)
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8. A method comprising:
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obtaining media including first geographic information steganographically hidden therein, wherein the first geographic information corresponds to at least one location or area represented in the media; obtaining second geographic information, the second geographic information comprising a refinement relative to the first geographic information for the at least one location or area represented in the media; and steganographically hiding the second geographic information in the media. - View Dependent Claims (9, 10)
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11. The method of claim wherein said obtaining second geographic information comprises at least decoding the first geographic information steganographically hidden in the media.
Specification