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Now showing items 497-503 of 503

  • Watermarking digital images for copyright protection 

    BOLAND, FRANCIS MORGAN (IEE, 1995)
    A watermark is all invisible mark placed on an image that can only be detected when the image is compared with the original. This mark is designed to identify both the source of a document as well as its intended recipient. ...
  • Watermarking digital images for copyright protection 

    BOLAND, FRANCIS MORGAN (IEE, 1996)
    A watermark is an invisible mark placed on an image that is designed to identify both the source of an image as well as its intended recipient. The authors present an overview of watermarking techniques and demonstrate a ...
  • A wavelet-based Bayesian framework for 3D object segmentation in microscopy 

    RAMASWAMI, MANI; PAN, KANGYU; KOKARAM, ANIL; CORRIGAN, DAVID (2012)
    In confocal microscopy, target objects are labeled with fluorescent markers in the living specimen, and usually appear with irregular brightness in the observed images. Also, due to the existence of out-of-focus objects ...
  • Whispering gallery mode emission from photonic microtubes 

    DONEGAN, JOHN FRANCIS; GOUNKO, IOURI; PEROVA, TANIA; RAKOVICH, YURY (IEEE, 2006)
    We have found cylindrical glass microtubes can be formed by vacuum assisted filtration using a micro-channel glass matrix followed by thermal treatment of the material. The microtubes are strongly luminescent and exhibit ...
  • Whispering-gallery modes in photonic tubes 

    GOUNKO, IOURI; DONEGAN, JOHN FRANCIS; PEROVA, TANIA; RAKOVICH, YURY (Society of Photo-optical Instrumentation Engineers (SPIE), 2007)
    A new method has been developed to fabricate microtube resonators with strong whispering-gallery-mode emission and quality factors up to 3000.
  • Whitespace Networks Relying on Dynamic Control Channels 

    DA SILVA, LUIZ; NOLAN, KEITH (2013)
    The emergence of whitespace networks, and whitespace communications in general, provides an opportunity to, at least partially, meet the ever-growing demand for mobile data communication. Most of the whitespace network ...
  • X-ray diffraction study of ferroelectric and antiferroelectric liquid crystal mixtures exhibiting de Vries SmA∗-SmC∗ transitions 

    VIJ, JAGDISH; MANNA, UTTAM; FUKUDA, ATSUO (2010)
    In this Rapid Communication, results on smectic layer thickness, using synchrotron radiation x-ray diffraction, for different mixtures of ferroelectric and antiferroelectric liquid crystals are given. We find that with ...