Based On Vector Quantization Digital Watermarking Resarch And Application

Vector quantization is a highly efficient data compression techniques,as the compression ratio is large and simple it was widely used in decoding the image compression, voice coding and other fields. Digital watermarking technology which embedded the serial number, text, binary images and other information into the multimedia data, multimedia information is aimed at tracking and copyright protection of copyright, especially in the image, the video has been widely used as multi-media information security area of research is a key point. The study of digital watermarking which base on vector quantization, that is, to study in the compressed domain digital watermarking. Vector quantization of digital watermarking technology basic idea is to match the input vector set to use the code word index table transfer of copyright protected information. With the upgrading of digital products, high-definition digital camera come into the daily life, color image digital watermarking has become an important object of research, at the same time as the 3G era, the popularity of smart phones, the mainstream smart phones associated with emergence of value-added services, based on Smartphone vector quantization digital watermarking technology will become a focus of the studyThis article is based on vector quantization for digital watermarking technology, research, analysis of the key technologies in the vector quantization codebook design and code word search. Select color images as research object, presents a color image YIQ color space information based on vector quantization of the DCT compressed domain digital watermarking algorithm. Based on the smart phone platform's characteristics to select a particular codeword and codebook design and search strategy, while the theory-based image retrieval integrated into the system were designed to generate the optimal codebook VQ system with self-recognition system. Major work to improve the content and the specific points are as follows: (1) Briefly introduce Symbian smart phone operating system, focusing on the codebook design and codebook search algorithm. With the analysis advantage and weakness of the traditional LBG algorithm and PNN algorithm, combined LBG codebook design and the PNN algorithm as the selected algorithm to generate codebook; In the search algorithm to compare advantage and weakness of the FS,with the EENNS algorithm and IEENNS algorithm, In the end Select IEENNS as smart phones codebook search algorithm(2) Select a color image as the object of study, analysis of several common color model and color image conversion.Thereby presents a color image YUI color space information based on vector quantization of the DCT compressed domain digital watermarking algorithm. Increase the information capacity of the watermark and watermark security, different levels of the watermark can be resistant, respectively JPEG compression with VQ reached the embedding of multiple watermarks, adapted to multi-purpose.(3) In the vector quantization of the practical application of digital watermarking technology, select Symbian Os operating system as an intelligent machine to Nokia smart phone for the study. This chapter is divided into two subsystems, the first one is the optimal codebook generation system, the second is the self-recognition VQ system, the previous system after a systematic basis, this paper gives the two systems were prototypes...