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A Data Hiding Scheme Based on Turtle-shell for AMBTC Compressed Images
( Chin-feng Lee ),( Chin-chen Chang ),( Guan-long Li ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.6
Data hiding technology hides secret information into the carrier, so that when the carrier is transmitted over network, it will not attract any malicious attention. Using data compression, it is possible to reduce the data size into a small compressed code, which can effectively reduce the time when transmitting compressed code on the network. In this paper, the main objective is to effectively combine these two technologies. We designed a data hiding scheme based on two techniques which are turtle-shell information hiding scheme and absolute moment block truncation coding. The experimental results showed that the proposed scheme provided higher embedding capacity and better image quality than other hiding schemes which were based on absolute moment block truncation coding.
Chin-Feng Lai,Min Chen,Jeng-Shyang Pan,Chan-Hyun Youn,Han-Chieh Chao IEEE 2014 IEEE Journal of Biomedical and Health Informatics Vol.18 No.2
<P>As cloud computing and wireless body sensor network technologies become gradually developed, ubiquitous healthcare services prevent accidents instantly and effectively, as well as provides relevant information to reduce related processing time and cost. This study proposes a co-processing intermediary framework integrated cloud and wireless body sensor networks, which is mainly applied to fall detection and 3-D motion reconstruction. In this study, the main focuses includes distributed computing and resource allocation of processing sensing data over the computing architecture, network conditions and performance evaluation. Through this framework, the transmissions and computing time of sensing data are reduced to enhance overall performance for the services of fall events detection and 3-D motion reconstruction.</P>
A Robust and Removable Watermarking Scheme Using Singular Value Decomposition
( Ya-feng Di ),( Chin-feng Lee ),( Zhi-hui Wang ),( Chin-chen Chang ),( Jianjun Li ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12
Digital watermarking techniques are widely applied to protect the integrity and copyright of digital content. In a majority of the literature for watermarking techniques, the watermarked image often causes some distortions after embedding a watermark. For image-quality-concerned users, the distortions from a watermarked image are unacceptable. In this article, we propose a removable watermarking scheme that can restore an original-like image and resist signal-processing attacks to protect the ownership of an image by utilizing the property of singular value decomposition (SVD). The experimental results reveal that the proposed scheme meets the requirements of watermarking robustness, and also reestablishes an image like the original with average PSNR values of 59.07 dB for reconstructed images.
A Robust and Removable Watermarking Scheme Using Singular Value Decomposition
Di, Ya-Feng,Lee, Chin-Feng,Wang, Zhi-Hui,Chang, Chin-Chen,Li, Jianjun Korean Society for Internet Information 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12
Digital watermarking techniques are widely applied to protect the integrity and copyright of digital content. In a majority of the literature for watermarking techniques, the watermarked image often causes some distortions after embedding a watermark. For image-quality-concerned users, the distortions from a watermarked image are unacceptable. In this article, we propose a removable watermarking scheme that can restore an original-like image and resist signal-processing attacks to protect the ownership of an image by utilizing the property of singular value decomposition (SVD). The experimental results reveal that the proposed scheme meets the requirements of watermarking robustness, and also reestablishes an image like the original with average PSNR values of 59.07 dB for reconstructed images.
Ci-Wen Luo(Ci-Wen Luo),Yu-Hsiang Kuan(Yu-Hsiang Kuan),Wen-Ying Chen(Wen-Ying Chen),Chun-Jung Chen(Chun-Jung Chen),Frank Cheau-Feng Lin(Frank Cheau-Feng Lin ),Stella Chin-Shaw Tsai(Stella Chin-Shaw Tsa 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: This cohort study investigated the correlation between Parkinson’s disease (PD) risk and chronic obstructive pulmonary disease (COPD) risk under particulate matter with an aerodynamic diameter ≤2.5 μm (PM2.5) exposure. METHODS: Data from the National Health Research Institutes of Taiwan were used in this study. The Environmental Protection Administration of Taiwan established an air quality monitoring network for monitoring Taiwan’s general air quality. COPD was indicated by at least 3 outpatient records and 1 hospitalization for COPD. After the implementation of age, sex, and endpoint matching at a 1:4 ratio, 137 patients and 548 patients were included in the case group and control group, respectively. Based on the 2005 World Health Organization (WHO) standards, monthly air particle concentration data were classified into the following 4 groups in analyses of exposure–response relationships: normal level, and 1.0, 1.5, and 2.0 times the WHO level ([concentration ≥2]×25 μg/m3×number of exposure months). RESULTS: A multivariate logistic regression revealed that the 1.0 and 1.5 WHO level groups did not significantly differ from the normal level group, but the 2.0 WHO level did (odds ratio, 4.091; 95% confidence interval, 1.180 to 14.188; p=0.038). CONCLUSIONS: Elevated PM2.5 concentrations were significantly correlated with an increased risk of PD among patients with COPD. Furthermore, exposure to high PM2.5 levels can further increase the risk of PD.
Chin-FahWang,Jeng-I Tsai,Fong-Long Feng,Kun-Wei Huang 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.2
Eriophyoid mites inhabit Yushan canes at elevations from 1650 to 3400 m in Taiwan. A total of 1491 eriophyoidmite specimens collected between 2001 and 2008 from18 sites in Taiwan belonging to 10 genera and 15 specieswere examined and recorded to evaluate the relationships between species composition and environmentalfactors. The environmental factors assessed consisted of climate data, cane leaf length, and vegetation type. Among the 15 species, Abacarus panatics Kefier, 1977 and Tetra yushania Huang, K.W., 2001. Eriophyoid mitesof Taiwan: description of eighty-six species from the Tengchih area. Bull. Natl. Mus. Nat. Sci. 14, 1–84 occur atall 18 survey sites. Canonical correspondence analysis was used to analyze the relationships among sites,eriophyoid mite occurrences, and environmental variables. Eriophyoid mite species composition and plantcommunity types were analyzed using non-metric multidimensional scaling (MDS). Canonical correspondenceanalysis (CCA) indicated that temperature and leaf length were major factors that influenced changes ineriophyoid mite assemblages. MDS results showed that eriophyoid mite species composition is unrelated toplant community types. The distribution patterns of the 15 eriophyoid mites is hypothesized to be randomizedby forest fires initially and subsequently influenced by temperature and leaf length.