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Region of Non-Interest (RONI) based digital watermarking has attracted much attention recently for medical image (MI) applications. The legal and ethical concern of medical professionals grow with watermark embedding as it erratically modifies the MIs. To minimize this concern, RONI segmentation is an essential process of MI watermarking that confines the embedding region. However, finding a suitable...
This paper presents dispersion flattened holey optical fiber (DF-HF) for tailoring nearly zero ultra flattened dispersion of 0.65 ps/nm/km and low confinement losses of the order less than 10−5 dB/km for 1.25–1.60 µm (350 nm bandwith) wavelength range. The finite-element method with perfectly matched layers (PML) boundary condition is used to investigate the guiding properties. It has been shown theoretically...
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