Now showing items 1020-1039 of 2554

    • Image compression using multiscale geometric edge models 

      Wakin, Michael Bruce (2002)
      Edges are of particular interest for image compression, as they communicate important information, contribute large amounts of high-frequency energy, and can generally be described with few parameters. Many of today's most ...
    • Image Data Compression 

      Wei, Dong (1995-05-01)
      Wavelet-based multi-resolution representation has become a cutting-edge technology in the area of image data compression. Though the discrete wavelet transform is closely related to the perfect-reconstruction octave-band ...
    • IMAGE DATA COMPRESSION AND RECONSTRUCTION BASED ON FREQUENCY DOMAIN CONSIDERATIONS AND PARTIAL DIFFERENTIAL EQUATION MODELS 

      CHEN, TING-CHUNG CHARLES (1981)
      The image data compression and reconstruction problems are investigated in this dissertation, and new techniques for their solution are presented. Conventional image transform coding techniques are given a spatial domain ...
    • Image data compression using wavelet decomposition 

      Wei, Dong (1995)
      Wavelet-based multi-resolution representation has become a cutting-edge technology in the area of image data compression. Though the discrete wavelet transform is closely related to the perfect-reconstruction octave-band ...
    • Image enhancement by nonlinear wavelet processing 

      Odegard, Jan E. (1994-10-20)
      In this paper we describe how the theory of wavelet thresholding introduced by Donoho and Johnstone can successfully be applied to two distinct problems in image processing where traditional linear filtering techniques are ...
    • Image mapping spectrometry: calibration and characterization 

      Bedard, Noah; Hagen, Nathan; Gao, Liang; Tkaczyk, Tomasz S. (2012)
      Image mapping spectrometry (IMS) is a hyperspectral imaging technique that simultaneously captures spatial and spectral information about an object in real-time. We present a new calibration procedure for the IMS as well ...
    • Image Restoration Using the EM Algorithm and Wavelet-Based Complexity Regularization 

      Figueiredo, Mario; Nowak, Robert David (2002-05-20)
      This paper introduces an <i>expectation-maximization</i> (EM) algorithm for image restoration (deconvolution) based on a penalized likelihood formulated in the wavelet domain. Regularization is achieved by promoting a ...
    • Image Super-Resolution for Improved Automatic Target Recognition 

      Wagner, Raymond; Waagen, Donald; Cassabaum, Mary (2004-04-01)
      Infrared imagers used to acquire data for automatic target recognition are inherently limited by the physical properties of their components. Fortunately, image super-resolution techniques can be applied to overcome the ...
    • Imagine: Media Processing with Streams 

      Khailany, Brucek; Dally, William J.; Kapasi, Ujval J.; Mattson, Peter; Namkoong, Jinyung; Owens, John D.; Towles, Brian; Chang, Andrew; Rixner, Scott (2001-03-20)
      The Power-efficient Imagine stream processor achieves performance densities comparable to those of special-purpose embedded processors. Executing programs mapped to streams and kernels, a single Imagine processor is expected ...
    • Imaging and Visual Classification by Knowledge-Enhanced Compressive Imaging 

      Li, Yun (2015-09-10)
      Compressive imaging is a technology that uses multiplexed measurements and the sparsity of many natural images to efficiently capture and reconstruct images. The compressive single pixel camera is one embodiment of such ...
    • Imaging genetics via sparse canonical correlation analysis 

      Chi, Eric C.; Allen, Genevera I.; Zhou, Hua; Kohannim, Omid; Lange, Kenneth; Thompson, Paul M. (2013)
      The collection of brain images from populations of subjects who have been genotyped with genome-wide scans makes it feasible to search for genetic effects on the brain. Even so, multivariate methods are sorely needed that ...
    • Imaging molecular adsorption and desorption dynamics on graphene using terahertz emission spectroscopy 

      Ajayan, P.M.; Kono, J.; Tonouchi, M. (2014)
      Being an atomically thin material, graphene is known to be extremely susceptible to its environment, including defects and phonons in the substrate on which it is placed as well as gas molecules that surround it. Thus, any ...
    • Imaging Plasmons with Compressive Hyperspectral Microscopy 

      Lu, Liyang (2015-04-23)
      With the ability of revealing the interactions between objects and electromagnetic waves, hyperspectral imaging in optical microscopy is of great importance in the study of various micro/nano-scale physical and chemical ...
    • Imaging with Terahertz Pulses 

      Dorney, Timothy D.; Johnson, Jon L.; Mittleman, Daniel M.; Baraniuk, Richard G. (2000-07-01)
      Recently, a real-time imaging system based on terahertz (THz) time-domain spectroscopy has been developed. This technique offers a range of unique imaging modalities due to the broad bandwidth, sub-picosecond duration, and ...
    • Imaging with THz Pulses 

      Dorney, Timothy D.; Johnson, Jon L.; Mittleman, Daniel M.; Baraniuk, Richard G. (2000-09-01)
      A real-time imaging system based on terahertz (THz) time-domain spectroscopy has been demonstrated. This technique offers a range of unique imaging modalities due to the broad bandwidth, sub-picosecond duration, and ...
    • Immobilization of Cell-Adhesive Laminin Peptides in Degradable PEGDA Hydrogels Influences Endothelial Cell Tubulogenesis 

      Ali, Saniya; Saik, Jennifer E.; Gould, Dan J.; Dickinson, Mary E.; West, Jennifer L. (2013)
      Attachment, spreading, and organization of endothelial cells into tubule networks are mediated by interactions between cells in the extracellular microenvironment. Laminins are key extracellular matrix components and ...
    • Impact of Environmental Variables on the Reduction of Nitric Acid by Proxies for Volatile Organic Compounds Emitted by Motor Vehicles 

      Leong, Y. J.; Rutter, A.P.; Wong, H.Y.; Gutierrez, C.V.; Junaid, M.; Scheuer, E.; Gong, L.; Lewicki, R.; Dibb, J.E.; Tittel, F.K.; Griffin, R.J. (2016)
      Recent work has identified nitric acid (HNO3) as a potential precursor of nitrous acid (HONO), which is an important source of oxidants that regulate ozone and particulate pollution. Recent work in our laboratory has ...
    • The Impact of Exploiting Instruction-Level Parallelism on Shared-Memory Multiprocessors 

      Pai, Vijay S.; Ranganathan, Parthasarathy; Abdel-Shafi, Hazim; Adve, Sarita V. (1999-02-20)
      Current microprocessors incorporate techniques to aggressively exploit instruction-level parallelism (ILP). This paper evaluates the impact of such processors on the performance of shared-memory multiprocessors, both without ...
    • Impact of Geometry on the TM Photonic Band Gaps of Photonic Crystals and Quasicrystals 

      Jia, Lin; Bita, Ion; Thomas, Edwin L. (2011)
      Here we demonstrate a novel quantitative procedure to pursue statistical studies on the geometric properties of photonic crystals and photonic quasicrystals (PQCs) which consist of separate dielectric particles. The geometric ...
    • Impact of growth temperature on InAs/GaInSb strained layer superlattices for very long wavelength infrared detection 

      Haugan, H.J.; Brown, G.J.; Elhamri, S.; Mitchel, W.C.; Mahalingam, K.; Kim, M.; Noe, G.T.; Ogden, N.E.; Kono, J. (2012-10-23)
      We explore the optimum growth space for a 47.0A ° InAs/21.5A ° Ga0.75In0.25Sb superlattices (SLs) designed for the maximum Auger suppression for a very long wavelength infrared gap. Our growth process produces a consistent ...