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Electronic watermark embedding device, electronic watermark detection device and method thereof

An electronic watermarking and detection device technology, which is applied in the direction of electrical components, image data processing, instruments, etc., to achieve the effect of fast processing and fast detection processing

Active Publication Date: 2010-04-14
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, there is no electronic watermark embedding method and detection method that can allow a little geometric deformation and can perform rapid detection processing in the terminal.

Method used

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  • Electronic watermark embedding device, electronic watermark detection device and method thereof
  • Electronic watermark embedding device, electronic watermark detection device and method thereof
  • Electronic watermark embedding device, electronic watermark detection device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0121] In the first embodiment, the digital watermark embedding technology will be described first, and then the digital watermark detection technology will be described.

[0122] (embedding of electronic watermark)

[0123] figure 1 The configuration of the digital watermark embedding device 10 according to the first embodiment of the present invention is shown. figure 2 The flow chart of is showing the processing flow of the digital watermark embedding device 10 .

[0124] Such as figure 1 As shown, the digital watermark embedding device 10 of the first embodiment has an image input unit 11 , a block division unit 12 , a watermark information expansion unit 13 , a block unit embedding unit 14 , and an image output unit 15 . refer to figure 2 The flow chart of FIG. 2 will describe the operation of the digital watermark embedding apparatus 10 having such a configuration.

[0125] First, input the original image, embedding strength value, and watermark information (step ...

no. 2 Embodiment

[0218] Next, a second embodiment of the present invention will be described.

[0219] In the first embodiment and the second embodiment, the method of embedding the embedding sequence into the pixel block by the digital watermark embedding device 10 is different. In addition, corresponding to the difference in the embedding method, the watermark information detection method of the digital watermark detection device 30 is different. More specifically, the processing of the block-by-block embedding unit and the processing of the block-by-block detection unit differ between the first and second embodiments. Except for the difference between the first embodiment and the second embodiment described below, everything is the same as the first embodiment.

[0220] (embedding of electronic watermark)

[0221] Figure 25 The structure of the block unit embedding unit 50 in the digital watermark embedding device 10 according to the second embodiment of the present invention is shown, ...

no. 3 Embodiment

[0248] Next, a third embodiment of the present invention will be described.

[0249] In the third embodiment and the first and second embodiments, the method of embedding the embedding sequence into the pixel block by the digital watermark embedding device 10 is different. In addition, corresponding to the difference in the embedding method, the watermark information detection method of the digital watermark detection device 30 is different. More specifically, in the third embodiment and the first and second embodiments, the processing of the block-by-block embedding unit and the processing of the block-by-block detection unit are different. Except for the differences between the third embodiment and the first and second embodiments described below, everything is the same as the first embodiment.

[0250] (embedding of electronic watermark)

[0251] Figure 35 The structure of the block unit embedding unit 70 of the third embodiment is shown, Figure 36 Its processing flow...

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PUM

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Abstract

The invention relates to an electronic watermark embedding device, comprising a block division unit for dividing an input image into a plurality of pixel blocks; an electronic watermark diffusion unitfor diffusing the input electronic watermark information so as to acquire an embedded sequence of the length corresponding to the number of pixel blocks divided; a per-block embedding unit for selecting at least one frequency from a predetermined plurality of frequencies according to the term value of the embedding sequence corresponding to the position in the image of one pixel block, amplifyingthe amplitude of the waveform pattern corresponding to the selected frequency with the embedment intensity value, and overlapping the waveform pattern whose amplitude has been amplified, on the one pixel block; and an image output unit for outputting the image in which the waveform pattern is overlapped for each pixel block by the per-block embedding unit.

Description

technical field [0001] The present invention relates to an electronic watermarking technology for embedding other auxiliary information in contents such as images and videos without human perception, and reading the auxiliary information. Today, electronic watermark technology is used in content copyright protection / management systems, content-related service provision systems, and the like. Background technique [0002] When distributing content such as images, video, and audio, there is a method of using digital watermark technology that embeds other information in the content for the purposes of content identification / management, copyright protection / management, provision of related information, etc. . In particular, in the case of scanning or photographing an input printed matter, and detecting a digital watermark from an input image to provide related information (see Non-Patent Document 1, etc.), in order to detect in a terminal that lacks computer resources such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/387G06T1/00H04N1/40
Inventor 中村高雄片山淳山室雅司
Owner NIPPON TELEGRAPH & TELEPHONE CORP