Journal ArticleDOI
Multilevel Encrypted Text Watermarking on Medical Images Using Spread-Spectrum in DWT Domain
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TLDR
A secure multilevel watermarking scheme in which the encrypted text acts as a watermark based on secure spread-spectrum technique for digital images in discrete wavelet transform (DWT) domain is presented.Abstract:
This paper presents a secure multilevel watermarking scheme in which the encrypted text acts as a watermark. The algorithm is based on secure spread-spectrum technique for digital images in discrete wavelet transform (DWT) domain. Potential application of the proposed watermarking scheme is successfully demonstrated for embedding various medical watermarks in text format at different subband decomposition levels depending upon their performance requirements. In the embedding process, the cover CT Scan image is decomposed up to third level of DWT coefficients. Different text watermarks such as personal and medical record of the patient, diagnostic/image codes and doctor code/signature are embedded into the selective coefficients of the second and third level DWT for potential telemedicine applications. Selection of DWT coefficients for embedding is done by column wise thresholding of coefficients values. Also, encryption is applied to the ASCII representation of the text and the encoded text watermark is embedded. The algorithm correctly extracts the embedded watermarks without error and is robust against numerous known attacks without much degradation of the medical image quality of the watermarked image.read more
Citations
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Book ChapterDOI
Secure Spread Spectrum Based Multiple Watermarking Technique for Medical Images
TL;DR: The performance of the methods are compared with other reported techniques and have been found to be giving superior performance in terms of robustness, imperceptibility, embedding capacity and security as suggested by other authors.
Journal ArticleDOI
A Hybrid Secure watermarking technique in Telemedicine
TL;DR: For healthcare applications, a hybrid multiple watermarking has been projected for authentication and identity purpose and to improve the robustness performance of the scheme DWT, DCT and SVD is applied while inserting the multiple watermarks to reduce the noise effects on the watermarked image.
Book ChapterDOI
Toward a Secure and Robust Medical Image Watermarking in Untrusted Environment
TL;DR: A new hybrid image watermarking technique based on Number Theoretic Transform (NTT) and Diffie-Hellman on medical images in order to guarantee the security and preserve quality of medical images is proposed.
Book ChapterDOI
Robust and Secure Multiple Watermarking Technique for Application in Tele-Ophthalmology
TL;DR: The proposed multilevel watermarking method correctly extracts the embedded watermarks without error and is robust against the all considered attacks without significant degradation of the medical image quality of the watermarked image.
Journal ArticleDOI
A Novel Automatic Liver Segmentation by Level Set Method Over Real-Time Sensory Computed Tomography
TL;DR: The challenging task of Liver segmentation is the main motive, proposed with the exploring of level set methodology with signed pressure force combined with masking and other Morphological operations, which outperforms the comparative methods of the Radiologist's inference of liver boundary detection and an additional existing Local Fuzzy thresholding methodology.
References
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Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.
Book
Digital Watermarking
TL;DR: Digital Watermarking covers the crucial research findings in the field and explains the principles underlying digital watermarking technologies, describes the requirements that have given rise to them, and discusses the diverse ends to which these technologies are being applied.
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Improved spread spectrum: a new modulation technique for robust watermarking
TL;DR: The proposed ISS is as robust in practice as traditional SS, and achieves roughly the same noise robustness gain as quantization index modulation (QIM) but without the amplitude scale sensitivity of QIM.
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Fabrication and Characteristics of Chitosan Sponge as a Tissue Engineering Scaffold
Takeshi Ikeda,Kahori Ikeda,Kouhei Yamamoto,Hidetaka Ishizaki,Yuu Yoshizawa,Kajiro Yanagiguchi,Shizuka Yamada,Yoshihiko Hayashi +7 more
TL;DR: The relationship between the tensile properties and chitosan concentration indicated that the ultimate tensile strength for the sponge increased with a higher concentration, and the in vitro bFGF release study showed that the higher the concentration of chitOSan solution became, the longer the releasing time of the bF GF from the ch itosan sponge was.
Journal ArticleDOI
Characterization of Individuals with Sacroiliac Joint Bridging in a Skeletal Population: Analysis of Degenerative Changes in Spinal Vertebrae
Takeshi Imamura,Kazunobu Saiki,Keishi Okamoto,Junichiro Maeda,Hiroaki Matsuo,Tetsuaki Wakebe,Keiko Ogami,Yoshitaka Manabe,Hironobu Koseki,Masato Tomita,Atsushi Tagami,Makoto Osaki,Hiroyuki Shindo,Toshiyuki Tsurumoto +13 more
TL;DR: SIB and marginal osteophyte formation in vertebral bodies could coexist in a skeletal population of men by analyzing the degenerative changes in their whole vertebral column and comparing them with the controls.
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