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AssigneePanasonic Corporation
InventorsHisashi Inoue, Masataka Ejima, Kenichi Noridomi, Takashi Katsura, Shugo Horikami
Estimating the term…
Information embedding is performed by extracting vertices constituting a polygon from vector data, and changing a number of points that exist on sides of the polygon based on embedment information. Further, information reading is performed by extracting points existing on the sides of the polygon from the embedment information and embedded vector data, and by reading the embedment information according to a predetermined rule.
An information embedding device, comprising:
A computer-readable recording medium having a program recorded thereon, the program causing a computer to execute a method comprising:
Dependencies are inferred from the claim text.
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Robust watermarking, e.g. average attack or collusion attack resistant: geometric transfor invariant watermarking, e.g. affine transform invariant
Image watermarking: embedding of the watermark in the spatial domain
Image data processing or generation, in general
Term ended 12 Apr 2026 (estimated)
The present invention relates to an information embedding device which embeds embedment information in vector data and an art related thereto.
Demand of an electronic map is increasing with the spread of a car navigation system and the Internet. To a digital content such as the electronic map, a copy can be created easily. Accordingly, an illegal copy is increasing and protection of copyrights poses an important problem.
Document 1 (published Japanese Patent Application Laid-Open No. 2001-78019) discloses the following information embedding method.
FIG. 1 is a functional block diagram of an information embedding device according to Embodiment 1 of the present invention;
FIG. 2 is a flowchart of the information embedding device according to Embodiment 1 of the present invention;
FIG. 3(a) to FIG. 3(d) are illustrations of a polygon according to Embodiment 1 of the present invention;
Hereinafter, embodiments of the present invention are described with reference to the accompanying drawings.
Hereinafter, Embodiment 1 of the present invention is explained with reference to the accompanying drawings. FIG. 1 is a functional block diagram of an information embedding device according to Embodiment 1 of the present invention.
As shown in FIG. 1, the information embedding device comprises an extracting unit 1 and an information embedding unit 2. The information embedding unit 2 comprises a constant information inputting unit 3, an inserting number determining unit 4, a remainder calculating unit 5, and an insertion executing unit 6. The information embedding unit 2, using information of vertices extracted by the extracting unit 1, embeds embedment information in vector data in a manner such that the embedment information is held even when the coordinate system of the vector data is edited.