Wavelet domain color image watermark encryption algorithm based on differential evolution

A color image and differential evolution technology, applied in the field of image algorithms, can solve problems such as poor robustness and poor watermark invisibility, and achieve the effect of strong robustness and good invisibility

Inactive Publication Date: 2016-02-17
QUFU NORMAL UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a wavelet domain color image watermark optimization algorithm based on differential evolutio

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  • Wavelet domain color image watermark encryption algorithm based on differential evolution
  • Wavelet domain color image watermark encryption algorithm based on differential evolution
  • Wavelet domain color image watermark encryption algorithm based on differential evolution

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Embodiment Construction

[0042] The present invention will be described in detail below in combination with specific embodiments.

[0043] The present invention uses the strong global convergence ability and robustness of the differential evolution algorithm to propose a wavelet domain color image watermarking algorithm based on differential evolution. First, the original image is converted into a color space, and the RGB format is converted into a color image that is more suitable for human vision. The YIQ color format of the system extracts the luminance component Y, and then performs singular value decomposition on the four different frequency subbands generated by the three-level wavelet decomposition of the Y component using the discrete wavelet transform, and then performs a scrambling and encryption process on the watermark image Level discrete wavelet decomposition, and finally use differential evolution adaptive optimization to select embedding strength to add watermark information in the form...

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Abstract

The invention discloses a wavelet domain color image watermark encryption algorithm based on differential evolution. The operating method comprises the following steps: performing color space transformation on an original image to obtain a YIQ color format suitable for a human vision system and extracting a brightness component Y; adopting Arnold scrambling on a watermark image; performing three-stage discrete wavelet decomposition on the component Y of the original image to generate four sub-bands of different frequencies by utilizing discrete wavelet transform, thereby obtaining a sub-band image; representing a sub-band image matrix by using A, and performing singular value decomposition on the image subjected to three-stage wavelet decomposition; performing primary discrete wavelet decomposition on the watermark image subjected to scrambling encryption processing; performing watermark embedding; adaptively optimizing and selecting embedding strength by adopting differential evolution, and adding watermark information into the original image subjected to singular value decomposition in a multiplicative addition form. The invention has the beneficial effects that the watermark algorithm has high invisibility and is high in robustness.

Description

technical field [0001] The invention belongs to the technical field of image algorithms, and relates to a wavelet domain color image watermark algorithm based on differential evolution. Background technique [0002] With the continuous progress of computer technology, communication technology and multimedia technology, various digital products have been widely disseminated in the network in the form of digital media, which has brought about profound changes in human production and lifestyle, and promoted the development of social informatization. However, while people enjoy the convenience brought by digital technology, there are also many negative and negative effects. For example, the leakage, tampering and forgery of digital product information, and even being used for commercial purposes to seek illegal benefits, seriously damage the legitimate interests of product copyright owners. At present, there are two main solutions to these phenomena. One is to strengthen the co...

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Application Information

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IPC IPC(8): G06T1/00
Inventor 崔新春牛钰莹王静李倩丁家琳
Owner QUFU NORMAL UNIV
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