[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.13089/JKIISC.2003.13.6.33

Real-time Watermarking Algorithm using Multiresolution Statistics for DWT Image Compressor

최순영 (광운대학교 전자재료공학과)
서영호 (광운대학교 전자재료공학과)
유지상 (광운대학교 전자공학과)
김대경 (한양대학교 응용수학과)
김동욱 (광운대학교 전자재료공학과)

Publication Information

Journal of the Korea Institute of Information Security & Cryptology / v.13, no.6, 2003 , pp. 33-43 More about this Journal

Abstract

In this paper, we proposed a real-time watermarking algorithm to be combined and to work with a DWT(Discrete Wavelet Transform)-based image compressor. To reduce the amount of computation in selecting the watermarking positions, the proposed algorithm uses a pre-established look-up table for critical values, which was established statistically by computing the correlation according to the energy values of the corresponding wavelet coefficients. That is, watermark is embedded into the coefficients whose values are greater than the critical value in the look-up table which is searched on the basis of the energy values of the corresponding level-1 subband coefficients. Therefore, the proposed algorithm can operate in a real-time because the watermarking process operates in parallel with the compression procession without affecting the operation of the image compression. Also it improved the property of losing the watermark and the efficiency of image compression by watermark inserting, which results from the quantization and Huffman-Coding during the image compression. Visual recognizable patterns such as binary image were used as a watermark The experimental results showed that the proposed algorithm satisfied the properties of robustness and imperceptibility that are the major conditions of watermarking.

Keywords

DWT; Watermarking; Image compression; QSWT(Qualified Significant Wavelet Tree);

Citations & Related Records

Reference

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KSCI

Real-time Watermarking Algorithm using Multiresolution Statistics for DWT Image Compressor DWT기반 영상 압축기의 다해상도의 통계적 특성을 이용한 실시간 워터마킹 알고리즘

Real-time Watermarking Algorithm using Multiresolution Statistics for DWT Image Compressor