Kenji Matsuo

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This paper proposes a hierarchical secret sharing method for image data. In the conventional secret sharing scheme (SSS), secret data is reconstructed only if more shares are gathered and combine than a pre-decided number, k. Though large k makes a strong security feature, it creates problems with the handling of the many shares required to reconstruct the(More)
This paper proposes novel techniques for improving tiling artifacts and encoding time which are two of the largest problems with the JPEG2000 encoder.. The proposed method detects tiling artifacts during the coding process and reduces them automatically using tile−boundary adaptive post−quantization. It also provides a higher speed JPEG2000 coding process.(More)