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Capacity Controllable Location Map Free Reversible Watermarking

Chinese Journal of Electronics 2015年第3期24卷 518-523页

作者： HUANG Yuhsiu KUO Juiming hsieh wenshyong Department of Computer Science and Engineering National Sun Yat-sen University Department of Computer Science and Information Engineering Cheng Shiu University Department of Computer and Communication Shu-Te University

Reversible watermarking techniques enable the extraction of the embedding bits from a watermarked image in a lossless way. It exploits the high spatial correlation among neighboring pixels. Application in reversible watermarking includes military and medical images. Images occurs overflow or underflow problems during the imbedding process since pixels value may be out of range [0:255]. Most methods require a location map to solve such problems. A location map free reversible watermarking algorithm is proposed in this study. A prediction threshold value is computed, histogram shifting scheme based on the prediction threshold value to solve overflow and underflow problems. Another threshold value is adopted to achieve capacity control, image quality is better in different payload length with this control. The experimental results reveal that the performance of proposed method outperforms that proposed by FUJIYOSHI et al.

关键词： Reversible watermarking Capacity control Predicted value Histogram shifting

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EFFICIENT ALGORITHMS FOR IDENTIFYING ORTHOLOGOUS SIMPLE SEQUENCE REPEATS OF DISEASE GENES

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Journal of Systems Science & Complexity 2010年第5期23卷 906-916页

作者： Chienming CHEN Chihchia CHEN Tsanhuang SHIH Tunwen PAI Chinhua-HU wenshyong TZOU Department of Computer Science and Engineering National Taiwan Ocean University Keelung Taiwan Institute of Bioscience and Bioteehnology National Taiwan Ocean University Keelung Taiwan

Dynamic mutations of simple sequence repeats （SSRs） have been demonstrated to affect normal gene function and cause different genetic disorders. Several conserved and even partial functional SSR patterns are discovered in inherited orthologous disease genes. To explore a wide range of SSRs in genetic diseases, a comprehensive system focusing on identifying orthologous SSRs of disease genes through a comparative genomics mechanism is constructed and accomplished by adopting online Mendelian inheritance in man （OMIM） and NCBI HomoloGene databases as the fundamental resources of human genetic diseases and homologous gene information. In addition, an efficient and effective algorithm for searching SSR patterns is also developed for providing annotated SSR information among various model species. By integrating these data resources and mining technologies, biologists and doctors can systematically retrieve novel and important conserved SSR information among orthologous disease genes. The proposed system, Orthologous SSR for Disease Genes （OSDG）, is the first comprehensive framework for identifying orthologous SSRs as potential causative factors of genetic disorders and is freely available at http：//***/.

关键词： Comparative genomics genetic diseases HomoloGene microsatellites Online Mendelian Inheritance in Man (OMIM) short tandem repeat simple sequence repeat (SSR).

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