Shohei Fujimoto

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We treat a digital watermarking in digital still image based on discrete wavelet transform (DWT). For copyright protection, ID is embedded in DWT domain by using key sequence. For security, it is desirable to be hard to counterfeit the key and ID. In this work, we propose a watermarking method with new key sequence in the DWT domain. By using the proposed(More)
Analysis on soft-out of soft-in/soft-out decoding al­gorithms, such as Max-Log-MAP decoding and its sub-optimum decoding algorithms for binary linear codes, is shown. Results of experiments for a block turbo decoding for two-dimensional product codes of the codes are also shown.
For copyright protection, the bit pattern is embedded in discrete wavelet transform (DWT) domain by using a secret key sequence. For security, it is desirable to be hard to counterfeit the key sequence. In this work, we consider a watermarking method with a key sequence which is difficult to counterfeit. Additionally, we show the design method of the key(More)
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