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Information processing device, and information embedding method

A technology of an information processing device and an information processing method, which is applied in the directions of image data processing, image data processing, instruments, etc.

Inactive Publication Date: 2012-01-18
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the information embedding methods as disclosed in Japanese Laid-Open Patent Application No. 2000-216983, No. 2001-333267, and No. 2006-135922 have the following problems: Although Information can be easily embedded in image regions with large optical density in the image, but information cannot be embedded in image regions with small optical density in the image
[0009] For this reason, when the image area in which information can be embedded is limited, only by repeatedly assigning information items to image areas and using the It is difficult for the information embedding method to embed information to improve the extraction accuracy of the extracted information

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  • Information processing device, and information embedding method
  • Information processing device, and information embedding method
  • Information processing device, and information embedding method

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[0200] Similar to the first embodiment, the information embedding function of this embodiment includes an image division unit 22 , an information division unit 24 , an information allocation unit 25 , a memory unit 28 , and an information embedding unit 26 . The present embodiment differs from the first embodiment in that the information distribution unit 25 of the present embodiment performs distribution of partial information items corresponding to images rotated by 90 degrees.

[0201] Figure 12 An example of a state in which an image assigned a partial information item is rotated by 90 degrees in the second embodiment of the present invention is shown.

[0202] Similar to the first embodiment, the information assigning unit 25 of the present embodiment is arranged to assign the xth partial information item (x=(axi+bxj+m)mod N) to the image located in the image P1 by using formula (1). A partitioned image of two-dimensional space coordinates (i,j).

[0203] However, in o...

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Abstract

The present invention relates to an information processing device and an information embedding method. In the information processing device which embeds a number of partial information items produced from predetermined information in an image, an image dividing unit divides an image into a number of division images in a lattice formation to generate the division images. An information assigning unit assigns the partial information items to the division images generated by the image dividing unit. An information embedding unit embeds the partial information items assigned by the information assigning unit, in the division images. The information assigning unit assigns all the partial information items to a set of division images located in a predetermined direction.

Description

technical field [0001] The present invention relates to an information processing device having an information embedding function to embed predetermined information in an image, and an embedded information extraction function to extract the embedded information from the image. Background technique [0002] With the development of data communication network technology such as the Internet, techniques for preventing unauthorized use of multimedia data of images, videos, digital audio, etc. through the data communication network are attracting attention. [0003] Recently, research on techniques for embedding predetermined information in multimedia data by using steganography, digital watermarking, etc., has been developed for the purposes of copyright protection, data tracking, forged data detection, meta information addition, and the like. Digital watermarking is the technique of embedding data into digital audio, images or video without compromising image quality or sound q...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 原崇之柳下高弘
Owner RICOH KK