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Flexible image watermarking method and device based on human eye video features

A video feature and image watermarking technology, applied in the field of information security, can solve the problems of small-resolution images being particularly affected, image quality degrading, and no error correction capability.

Active Publication Date: 2014-08-20
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

However, the current watermarking algorithm has no error correction capability; and as the watermark capacity increases, the image quality will decrease significantly, especially for small-resolution images

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  • Flexible image watermarking method and device based on human eye video features
  • Flexible image watermarking method and device based on human eye video features
  • Flexible image watermarking method and device based on human eye video features

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Embodiment Construction

[0070] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0071] refer to figure 1 As shown, it is a schematic flow chart of a flexible image watermark embedding method based on human eye video features in an embodiment of the present invention, and the described flexible image watermark embedding method based on human eye video features includes steps:

[0072] Step 101, performing two-dimensional DFT transformation on image data to obtain image data in frequency domain.

[0073] In the embodiment of the present invention, it is necessary to perform DFT transformation on the image, and the DFT transformation needs to transform the image data whose width and height are integer powers of 2. If the width and height of the image are integer powers of 2, such as 512×512, DFT can be...

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Abstract

The invention discloses a flexible image watermarking method and device based on human eye video features. The method includes the first step of conducting two-dimensional DFT on image data to obtain frequency domain image data, the second step of selecting frequency domain data with watermarks to be embedded from the frequency domain image data and conducting hybrid encoding on original watermark information to obtain watermark information to be embedded, the third step of redividing the selected frequency domain data with the watermarks to be embedded into 4*4 data blocks and embedding 2-bit watermark information into each 4*4 data block, the fourth step of integrating the frequency domain data with the embedded watermarks into original frequency domain image data to obtain the frequency domain image data with the embedded watermarks, and the fifth step of conducting DFT inverse transformation to obtain image data with the embedded watermarks. Accordingly, the flexible image watermarking method and device based on the human eye video features has high error correcting capability and can ensure embedded capacity.

Description

technical field [0001] The invention relates to the field of information security, in particular to a method and device for flexible image watermarking based on human eye video features. Background technique [0002] At present, digital watermarking and cryptography are two major tools for information security. The difference is that the latter encrypts data. After encryption, the data cannot be used, and after decryption, the data is no longer protected; while the former can not only hide the content of information , and can hide the "existence" of information. Once the watermark is added to the protected data object, it will always exist without affecting the use value of the object. Definition of digital watermark: Digital watermark is a digital signal or pattern that is permanently "embedded" in other data (host data) and is identifiable, and does not affect the availability of the host data. [0003] Digital watermarking is widely used in people's daily life, mainly in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G06T3/00
Inventor 丁海洋周亚建杨义先张茹
Owner BEIJING UNIV OF POSTS & TELECOMM
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