Realization of Digital Watermark Technology Based on Static Image in Multimedia

This article take the stationary picture as the object of study, introduced briefly the digital watermark the research background, the basic characteristic, the classification as well as the application, the system elaboration image numeral watermark technology basic principle and the typical algorithm, and have made the detailed introduction to the image numeral watermark attack. In the analysis existing watermark algorithm foundation, the union chaos technology and the DCT theory, the design have realized one kind based on the air zone image watermark algorithm. Proposed one kind based on the air zone LSB algorithm digital image encryption algorithm, carries on the different encryption to the different value correspondence image point picture element, then the basis assigns the stochastic integer seeks the encryption result the depositing position. The experiment and the analysis indicated that, this algorithm realizes quite simply, also the invisibility is good, moreover resistance cutting and JPEG compression ability is strong, the algorithm time order of complexity is low, the encryption effect is good, the security is high.