CN102708536A - Strong-robustness transform domain encrypted holographic watermarking algorithm - Google Patents
Strong-robustness transform domain encrypted holographic watermarking algorithm Download PDFInfo
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Abstract
The invention relates to a strong-robustness transform domain encrypted holographic watermarking algorithm, wherein the algorithm is combined with Arnold inverse transformation encryption, discrete cosine transform, singular value decomposition, encrypted Fourier hologram and the like, firstly, a binary watermark image is subjected to inverse transformation encryption and phase modulation to generate a watermark hologram, so that the watermark information can be safe; channels divide is carried out on the color carrier in the embedding process, the blue channel is selected to discrete cosine transform and singular value decomposition sequentially, and then the hologram watermark is added. According to the results, the embedded watermark is good in invisibility and strong in robustness, the reconstructed watermark is high in similarity; and the disadvantage that the traditional hologram watermark cannot resist small-angle rotation and filtering attack is improved.
Description
Technical field
The present invention relates to a kind of copyright protection technology of digital product, particularly a kind of strong robustness transform domain is encrypted the holographic watermark algorithm.
Background technology
People's weak awareness of intellectual property rights along with being becoming increasingly rampant of pirate phenomenon, effectively protects the copyright of copyright to become instant realistic problem at present.Digital watermark technology itself has characteristics safe, that invisibility good, cost is low, flexible and changeable, has been widely used on the copyright protection of text, image, audio frequency, video and three-dimensional model.At present digital watermark can roughly be divided into two types of spatial domain and transform domains, and the transform domain digital watermark is current main flow, mainly comprises DWT, DCT, DFT technology etc.Than the spatial domain digital watermark, the transform domain watermark has stronger robustness.
The light holographic technique not only can write down the intensity signal of object, and can write down the phase information of object.DCT and SVD technology help to strengthen the robustness of watermark.Existing traditional holographic watermark algorithm is after meeting with rotation and filtering attack, and watermark information that extracts and original watermark information similarity are not high.
Summary of the invention
The present invention be directed to watermark information and the not high problem of original watermark information similarity that existing traditional holographic watermark algorithm extracts; Propose a kind of strong robustness transform domain and encrypted the holographic watermark algorithm; Utilize Arnold scrambling encryption, discrete cosine transform, svd and Fourier's holographic technique, to colored carriers image embed watermark information.This watermarking algorithm satisfies that to contain the once print scanned reconstruction watermark of watermarking images healthy and strong, rebuilds the fragile requirement of watermark after satisfying the secondary attacks of print_scan simultaneously.
Technical scheme of the present invention is: a kind of strong robustness transform domain is encrypted the holographic watermark algorithm, it is characterized in that, specifically comprises the steps:
1), read colored RGB carrier image, read watermarking images, watermarking images is a bianry image;
2), the colored carriers image is carried out pre-service, separate into the red R passage, green G passage and blue B passage according to the visual characteristic of human eye, are chosen blue B passage as the water mark inlaying passage;
3), watermarking images is carried out the Arnold scrambling encryption, structure reference light source, generation holographic watermark image;
4) the little piecemeal that, blue B passage is divided into non-overlapping copies; Each fritter is carried out the bidimensional dct transform, obtain matrix
;
5), to each matrix
Carry out svd, obtain three matrix U that size is impartial
i, S
i, V
i, choose each singular value matrix S
iFirst element form new matrix B;
6), matrix B and holographic watermark H weighting summation are obtained Matrix C, Matrix C is reverted to each singular value matrix S successively according to the ranks order
iFirst element obtain new singular value matrix S
i', with new singular value matrix S
i' and former U
i, V
iMatrix multiple reverts to each piecemeal, and each piecemeal is carried out inverse dct transform, has just obtained the coloured image behind the embed watermark in merging RGB triple channel.
Beneficial effect of the present invention is: strong robustness transform domain of the present invention is encrypted the holographic watermark algorithm, contains watermarking images and meets the human eye vision requirement, and the watermark invisibility is good, and robustness is high.Carry out various common to containing watermarking images; Still can extract highly similar watermarking images; And the satisfied once print scanned reconstruction watermark stalwartness of watermarking images that contains of this watermarking algorithm; Rebuild the fragile requirement of watermark after satisfying the secondary attacks of print_scan simultaneously, to having realistic meaning at digital copyright protecting and Information hiding field.
Description of drawings
Fig. 1 encrypts watermarking algorithm process flow diagram in the holographic watermark algorithm for strong robustness transform domain of the present invention;
Fig. 2 encrypts watermark extracting algorithm flow chart in the holographic watermark algorithm for strong robustness transform domain of the present invention.
Embodiment
Watermarking algorithm process flow diagram as shown in Figure 1: colored RGB carrier image is read in (1), reads watermarking images, and watermarking images is a bianry image; (2) the colored carriers image is carried out pre-service, separate into the red R passage, green G passage and blue B passage according to the visual characteristic of human eye, are chosen blue B passage as the water mark inlaying passage; (3) watermarking images is carried out the Arnold scrambling encryption, make up reference light source, generate holographic watermark image H; (4) blue B passage is divided into
The little piecemeal of non-overlapping copies carries out the bidimensional dct transform to each fritter, obtains matrix
(5) to each matrix
Carry out svd, obtain three matrix U that size is impartial
i, S
i, V
iHere choose each singular value matrix S
iFirst element form new matrix B, the size of B is identical with H; (6) matrix B and holographic watermark H weighting summation are obtained Matrix C, Matrix C is reverted to each singular value matrix S successively according to the ranks order
iFirst element obtain new singular value matrix S
i', with new singular value matrix S
i' and former U
i, V
iMatrix multiple reverts to each piecemeal.Each piecemeal is carried out inverse dct transform, just obtained the coloured image behind the embed watermark in merging RGB triple channel.
The process of watermark extracting is equivalent to the inverse process that watermark embeds.For the coloured image behind the embed watermark, advanced row of channels is separated, and chooses blue B passage equally and extracts watermark.Behind the B passage piecemeal each piecemeal is made dct transform; Carry out svd again; First element extraction of the singular value matrix S of each piecemeal is come out to form new matrix B '; The contrast matrix B ' obtain matrix H 0 with B after doing difference, give after the suitable watermark extracting intensity H0 to be carried out inverse Fourier transform.Do the Arnold inverse transformation at last again and rebuild watermarking images.
Utilized svd robustness and holographic watermark can not tearing to pieces property.Simulation result show this invention to cut, attack such as Gaussian noise, salt-pepper noise, filtering, convergent-divergent has very strong robustness.Satisfy the requirement of watermark validity and invisibility, have certain actual application value in the digital copyright protecting field.
Claims (1)
1. a strong robustness transform domain is encrypted the holographic watermark algorithm, it is characterized in that, specifically comprises the steps:
1), read colored RGB carrier image, read watermarking images, watermarking images is a bianry image;
2), the colored carriers image is carried out pre-service, separate into the red R passage, green G passage and blue B passage according to the visual characteristic of human eye, are chosen blue B passage as the water mark inlaying passage;
3), watermarking images is carried out the Arnold scrambling encryption, structure reference light source, generation holographic watermark image H;
4) the little piecemeal that, blue B passage is divided into non-overlapping copies; Each fritter is carried out the bidimensional dct transform, obtain matrix
;
5), to each matrix
Carry out svd, obtain three matrix U that size is impartial
i, S
i, V
i, choose each singular value matrix S
iFirst element form new matrix B;
6), matrix B and holographic watermark H weighting summation are obtained Matrix C, Matrix C is reverted to each singular value matrix S successively according to the ranks order
iFirst element obtain new singular value matrix S
i', with new singular value matrix S
i' and former U
i, V
iMatrix multiple reverts to each piecemeal, and each piecemeal is carried out inverse dct transform, has just obtained the coloured image behind the embed watermark in merging RGB triple channel.
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|---|---|---|---|---|
| CN102938133A (en) * | 2012-11-20 | 2013-02-20 | 海南大学 | Robust watermarking method for medical images on basis of Arnold scrambling transformation and DWT (discrete wavelet transform)-DFT (discrete Fourier transform) |
| CN103177415A (en) * | 2013-04-08 | 2013-06-26 | 上海理工大学 | Transform domain optical holographic watermarking algorithm based on colored image characteristic area |
| CN104680470A (en) * | 2013-11-26 | 2015-06-03 | 上海宝钢包装股份有限公司 | Method for embedding and extracting strong robustness hologram watermark on the basis of DWT-SVD (Discrete Wavelet Transform-Singular Value Decomposition) |
| CN106982372A (en) * | 2016-01-15 | 2017-07-25 | 中国移动通信集团福建有限公司 | Image processing method and equipment |
| WO2020228520A1 (en) * | 2019-05-10 | 2020-11-19 | 腾讯科技（深圳）有限公司 | Image transformation method and device, storage medium and computer equipment |
| CN112907435A (en) * | 2021-04-09 | 2021-06-04 | 辽宁工程技术大学 | High-robustness holographic blind watermarking algorithm based on improved Boqi coding and data interval mapping |
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| CN101661608A (en) * | 2009-08-31 | 2010-03-03 | 重庆大学 | Diginal image blind watermark adding, extracting and removing method suitable for internet |
| US20100245928A1 (en) * | 2009-03-31 | 2010-09-30 | Xerox Corporation | Methods of watermarking documents |
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| US20100245928A1 (en) * | 2009-03-31 | 2010-09-30 | Xerox Corporation | Methods of watermarking documents |
| CN101661608A (en) * | 2009-08-31 | 2010-03-03 | 重庆大学 | Diginal image blind watermark adding, extracting and removing method suitable for internet |
| CN102236882A (en) * | 2011-07-21 | 2011-11-09 | 上海理工大学 | Encrypted holographic watermark algorithm of transform domain based on copyright protection |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938133A (en) * | 2012-11-20 | 2013-02-20 | 海南大学 | Robust watermarking method for medical images on basis of Arnold scrambling transformation and DWT (discrete wavelet transform)-DFT (discrete Fourier transform) |
| CN103177415A (en) * | 2013-04-08 | 2013-06-26 | 上海理工大学 | Transform domain optical holographic watermarking algorithm based on colored image characteristic area |
| CN104680470A (en) * | 2013-11-26 | 2015-06-03 | 上海宝钢包装股份有限公司 | Method for embedding and extracting strong robustness hologram watermark on the basis of DWT-SVD (Discrete Wavelet Transform-Singular Value Decomposition) |
| CN106982372A (en) * | 2016-01-15 | 2017-07-25 | 中国移动通信集团福建有限公司 | Image processing method and equipment |
| CN106982372B (en) * | 2016-01-15 | 2020-03-31 | 中国移动通信集团福建有限公司 | Image processing method and apparatus |
| WO2020228520A1 (en) * | 2019-05-10 | 2020-11-19 | 腾讯科技（深圳）有限公司 | Image transformation method and device, storage medium and computer equipment |
| US11908038B2 (en) | 2019-05-10 | 2024-02-20 | Tencent Technology (Shenzhen) Company Limited | Image transformation method and apparatus, storage medium, and computer device |
| CN112907435A (en) * | 2021-04-09 | 2021-06-04 | 辽宁工程技术大学 | High-robustness holographic blind watermarking algorithm based on improved Boqi coding and data interval mapping |
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