Security, Digital Watermark Based On Images Printed And Electronic Seal

In today's rapid economic development, digital multimedia technology and Internet developments are changing the cultural dissemination of the carrier and approaches. Print issue of anti-counterfeiting and copyright protection become increasingly important in the current society. All along, the digital watermarking technology, research is on digital copyright protection, anti-counterfeiting applied research are still very few. Therefore, this article studies the major use of digital watermarking technology anti-counterfeiting printing images, and on this basis, the strengthening of electronic seal security system itself has been studied.This article start with talking about digital watermarking technology, the principles of digital watermarking technology, characteristics, classification, performance, typical algorithms are summarized and concluded. And analyze the security of digital watermarks in printed application background and research in the field of the status quo. On this basis, can be used to propose a new method for printing the image forgery. This method is a print of the scanned image, the algorithm is robust in a variety of attacks under the watermark can be extracted from the proof of copyright; if the right Two printing scanned images, the algorithm is fragile watermark disappear, that image is illegal reprint. To achieve this purpose, this article printed on the existing anti-scan digital watermarking algorithm was improved and the watermark embedding strength of a controlled airspace in the original image to two-dimensional random-bit copy watermark embedding, can effectively control the watermark algorithm robust performance. Paper, the use of corner detection method to calculate the watermark embedding strength, and using orthogonal experimental design method, the watermark embedding strength to optimize the parameters to arrive to meet the parameters of a robust range of secondary vulnerable. This algorithm is printed to meet the security requirements. This is an innovative point of this article.Digital Image Watermarking in the study, based on the electronic seal system applications for the present lack of research, combined with digital watermarking technology, presents a wavelet-based digital watermarking algorithm. Algorithm in the electronic seal system, seal the embedded watermark information, the system for security seals. In doing so, to some extent increase the security of electronic seal system. Handwritten digital signature generation algorithm based on watermark, the watermark embedded into the electronic seal images, implementation of the seal and the document's corresponding relationship, allowing unauthorized users can not be forged seals and tamper with the document content. Through simulation experiments, to achieve the seal cover containing the watermark information in the Word document. The algorithm proposed in this paper and ideas for future improvement of the development of electronic seal system provides a theoretical ideas and technical support. This is another innovation of the text.Finally, sum up the full text of digital watermarking technology, developing trends of vision and lack of response is given after the article for further research.