Highly-confidential anti-print digital image watermarking scan method
An anti-printing scanning and digital image technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of anti-printing and scanning interference characteristics and poor confidentiality, and achieve the effect of strong confidentiality and improved confidentiality
Active Publication Date: 2015-07-22
SOUTHEAST UNIV
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[0003] Purpose of the invention: In order to overcome the problems of anti-printing and scanning interference characteristics and poor confidentiality, the present invention provides a highly confidential anti-printing and scanning digital image watermarking method, which has good confidentiality
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[0039] The present invention will be further described below in conjunction with the accompanying drawings.
[0040] A kind of anti-print scanning digital image watermarking method with strong confidentiality, comprises the step of carrying out watermark picture embedding to original picture and the step of watermark picture extraction to picture containing watermark, specifically as follows:
[0041] Carry out watermark image embedding on the original image (such as figure 1 shown):
[0042] (11) Determine the binary image M of the watermark image, and determine the number of scrambling times s;
[0043] (12) Perform Arnold scrambling on M to get M 1 ;
[0044] (13) DWT transformation is performed on the original picture of m×m to obtain the low-frequency sub-image W, and DTC transformation is performed on W to obtain the matrix Z;
[0045] (14) carry out Zigzag scanning to Z, obtain one-dimensional matrix P;
[0046] (15) Take the first n elements of P to form a one-dim...
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The invention discloses a highly-confidential anti-print digital image watermarking scan method combining the features of zero watermarking and blind watermarking. The method includes performing Arnold scrambling on watermarking images, according to DWT and DCT conversion, acquiring image feature vectors in a low frequency region of an original image, and acquiring a key according to the information of the watermarking images; in the medium frequency region, embedding information relevant to the number of scrambling according to a matrix conversion method; extracting the watermarking images according to the scanned images and key. Owing to the zero watermarking application, the capacity of watermarking and stability of algorithm are guaranteed, and the confidentiality of the watermarking is improved through the application of the blind watermarking and scrambling; after the watermarking images acquired by the method are adopted by a printer and scanner, the indicator coefficient is in a satisfied range, the original watermarking image can be extracted effectively, and the practical value is provided.
Description
technical field [0001] The invention relates to a highly confidential anti-printing and scanning digital image watermarking method, which belongs to the image security technology. Background technique [0002] Digital watermarking technology is a fast-growing hotspot in the field of multimedia information security research. Since its development in the early 1990s, it has been highly concerned by academic circles and business circles at home and abroad. The theory and application of digital watermarking have achieved relatively good results. Great development. Anti-printing and scanning digital watermarking technology emerges with the corresponding demand, and it can be applied to solve problems such as copyright protection, source authentication, and counterfeiting prevention of printed matter. Most of the research is mainly concentrated on the basis of DCT and DFT transformation. There are few existing mainstream DWT transformation researches, which do not meet the needs ...
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IPC IPC(8): G06T1/00
Inventor 肖子豪张艺璇夏思宇冯炽李艺
Owner SOUTHEAST UNIV