JPEG (Joint Photographic Experts Group) 2000 integrated telescopic image watermarking method

Abstract

The invention provides a JPEG (Joint Photographic Experts Group) 2000 integrated telescopic image watermarking method. The method is characterized by comprising the watermarking embedding method and the watermarking extracting method. The watermarking embedding method comprises the following steps: 1, performing integer wavelet transformation; 2, performing Arnold transformation; 3, sequencing and layering; 4, performing H*H partitioning; 5, decomposing a singular value; 6, operating the intensity and difference value; 7, embedding an embedded watermark; 8, modifying the singular value operation; 9, decomposing and inversely operating the singular value; 10, encoding by EBCOT (Embedded Block Coding With Optimized Truncation). The watermarking extracting method comprises the following steps: 1, performing H*H blocking; 2, decomposing the singular value; 3, operating the intensity; 4, extracting information of watermarks at all levels; 5, inversely scrambling; 6, performing inverse wavelet transformation.

Description

technical field [0001] The invention relates to the field of computer information security, in particular to a scalable image watermark method integrated with the international image compression standard JPEG2000, which is used for digital copyright protection of images compressed by the JPEG2000 format. Background technique [0002] With the popularization of the network and the popularization of the concept of multimedia, multimedia compression requires higher performance and new features, so as to realize the emerging communication function of accessing multimedia at any time, any place, and any device, so it can be efficiently adapted to multiple JPEG2000, an image coding technology for this kind of demand, came into being. JPEG2000 adopts scalable (scalable) coding technology and architecture, which can extract multiple representations with different code rates from a single multimedia coded data stream, so as to achieve an optimal compromise between quality and code ra...

AI Technical Summary

Problems solved by technology

Some algorithms are only robust to preset compression ratios, but not suitable for further compression or situations where content adaptation is required

The various watermarking techniques based on traditional ideas that have been proposed are far from being able to meet the practical application requirements of scalable coding standards.

[0006] Scalable coding has become the mainstream standard and research hotspot in the current data coding field, but the research on information hiding technology compatible with scalable coding functions is relatively lagging behind, and the theory, method and technology are seriously lacking, which hinders the application of scalable coding standards such as JPEG2000

Images