Digital Watermarking for Images : Its Analysis and Improvement Using Digital Signal Processing Technique(<特集>Special Section on the Trend of Digital Signal Processing and Its Future Direction)
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概要
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In this paper, we discuss digital watermarking techniques besed on modifying the spectral coefficient of an image, classified into quantization-based and correlation-based watermarking techniques. We first present a model of the watermark embedding and extracting processes and examine the robustness of the watermarking system against common image processing. Based on the result, we clarify the reason why detection errors occur in the watermark extracting process and give a method for evaluating the performance of the watermarking system. And then we study an improvement of the watermark extracting process using the deconvolution technique and present some concluding remarks in the last section.
- 社団法人電子情報通信学会の論文
- 2002-03-01
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関連論文
- A Digital Watermark Technique Based on the Wavelet Transform and Its Robustness on Image Compression and Transformation (Special Section on Cryptography and Information Security)
- Digital Watermarking for Images : Its Analysis and Improvement Using Digital Signal Processing Technique(Special Section on the Trend of Digital Signal Processing and Its Future Direction)
- An Analysis of Correlation-Based Watermarking Systems