1,403 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Images"  
prev Results: 73 - 96 next
open access

INITIAL IMAGES FROM A 24-WIRE LIQUID XENON Y -CAMERA.

Description: A prototype liquid xenon {gamma}-camera has been constructed and preliminary results obtained. The sensitive volume is 7 c x 7 cm in area and 1.5 cm thick. Orthogonal coordinates for each interacting {gamma}-ray are provided by 24 anode wires 5 {micro} in diameter spaced 2.8 mm apart and 24 cathode strips.
Date: December 1, 1972
Creator: Zaklad, Haim; Derenzo, Stephen E.; Muller, Richard A. & Smits,Robert G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Matching Shapes Using Local Descriptors

Description: We present a method for comparing shapes of grayscale images in noisy circumstances. By establishing correspondences in a new image with a shape model, we can estimate a transformation between the new region and the model. Using a cost function for deviations from the model, we can rank resulting shape matches. We compare two separate distinct region detectors: Scale Saliency and difference of gaussians. We show that this method is successful in comparing images of fluid mixing under anisotropi… more
Date: August 13, 2004
Creator: White, R; Newsam, S & Kamath, C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

AN INVENTORY OF PHOTOGRAPHS OF ZINC ELECTRODEPOSITED FROM ACID ELECTROLYTES

Description: Electrodeposition of zinc from acid electrolytes has been studied by several investigators in this laboratory. A large number of zinc deposits have been observed and photographs (SEM, micrographs, experimental equipment, and line drawings) have been prepared over the years 1976-1983. These photos are compiled in this LBL report to facilitate their future use by others. The tables in this report list the experimental conditions and corresponding identification numbers of photographs that are on … more
Date: September 1, 1983
Creator: Faltemier, J. L.; Jaksic, M. M.; Tsuda, T. & Tobias, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Annex G:transformation of images, extensions

Description: This Recommendation/International Standard uses a transformation of tile components. In this Annex and all of its sub clauses, the flow charts and tables are normative only in the sense that they are defining an output that alternative implementations shall duplicate.
Date: January 1, 2001
Creator: Brislawn, C. M. (Christopher M.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Resampling approach for anomaly detection in multispectral images

Description: We propose a novel approach for identifying the 'most unusual' samples in a data set, based on a resampling of data attributes. The resampling produces a 'background class' and then binary classification is used to distinguish the original training set from the background. Those in the training set that are most like the background (i e, most unlike the rest of the training set) are considered anomalous. Although by their nature, anomalies do not permit a positive definition (if I knew what the… more
Date: January 1, 2003
Creator: Theiler, J. P. (James P.) & Cai, D. (David)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Automated Image Registration (AIR) of MTI Imagery

Description: This paper describes an algorithm for the registration of imagery collected by the Multispectral Thermal Imager (MTI). The Automated Image Registration (AIR) algorithm is entirely image-based and is implemented in an automated fashion, which avoids any requirement for human interaction. The AIR method differs from the 'direct georeferencing' method used to create our standard coregistered product since explicit information about the satellite's trajectory and the sensor geometry are not require… more
Date: January 1, 2003
Creator: Pope, P. A. (Paul A.) & Theiler, J. P. (James P.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plasma production from shock compression of condensed matter

Description: The experimental investigation of HE-driven, phased, cylindrical, SS liner implosion has yielded many interesting results. Plasma and radiation are found to be copiously produced. Plasmas with velocity up to 17 cm/{mu}s are observed. The temperature in the expansion surface reaches 8 - 10 eV and stays hot for tens of microseconds. The signatures of plasma interactions with the imploding wall and the glass port are clearly identified. Finally, a cluster of cooler but still self-luminous, high-de… more
Date: September 1, 1995
Creator: Tan, T. H. & Marsh, S. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Forensic 3D Scene Reconstruction

Description: Traditionally law enforcement agencies have relied on basic measurement and imaging tools, such as tape measures and cameras, in recording a crime scene. A disadvantage of these methods is that they are slow and cumbersome. The development of a portable system that can rapidly record a crime scene with current camera imaging, 3D geometric surface maps, and contribute quantitative measurements such as accurate relative positioning of crime scene objects, would be an asset to law enforcement agen… more
Date: October 12, 1999
Creator: LITTLE,CHARLES Q.; PETERS,RALPH R.; RIGDON,J. BRIAN & SMALL,DANIEL E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gamma-ray Imaging Methods

Description: In this document we discuss specific implementations for gamma-ray imaging instruments including the principle of operation and describe systems which have been built and demonstrated as well as systems currently under development. There are several fundamentally different technologies each with specific operational requirements and performance trade offs. We provide an overview of the different gamma-ray imaging techniques and briefly discuss challenges and limitations associated with each mod… more
Date: October 5, 2006
Creator: Vetter, K; Mihailescu, L; Nelson, K; Valentine, J & Wright, D
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Investigation Into the Use of Juxtaposed Imagery

Description: This paper involves the investigation of the juxtaposition of images through the artists' works and related historical background to the use of this technique. Christopher Hill Morse proposes a series of questions to define personal criteria for choosing images and discusses the impact of these images in the works.
Date: May 1986
Creator: Morse, Christopher Hill
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Induced star formation and morphological evolution in very high redshift radio galaxies

Description: Near-infrared, sub-arcsecond seeing images obtained with the W M Keck I Telescope of show strong evolution at rest-frame optical wavelengths in the morphologies of high redshift radio galaxies (HzRGs) with 1 9 < z < 4 4 The structures change from large-scale low surface brightness regions surrounding bright, multiple component and often radio-aligned features at z > 3, to much more compact and symmetrical shapes at z < 3 The linear sizes ({approximately} 10 kpc) and luminosities (M{sub B} {appr… more
Date: October 1, 1997
Creator: van Breugel, W. J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Penetration Experiments with 6061-T6511 Aluminum Targets and Spherical-Nose Steel Projectiles at Striking Velocities Between 0.5 and 3.0 km/s

Description: We conducted depth of penetration experiments with 7.11-mm-diameter, 74.7-mm-long, spherical-nose, 4340 steel projectiles launched into 250-mm-diameter, 6061-T6511 aluminum targets. To show the effect of projectile strength, we used projectiles that had average Rockwell harnesses of R{sub c} = 36.6, 39.5, and 46.2. A powder gun and two-stage, light-gas guns launched the 0.023 kg projectiles at striking velocities between 0.5 and 3.0 km/s. Post-test radiographs of the targets showed three respon… more
Date: February 4, 1999
Creator: Forrestal, M. J. & Piekutowski, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Detection of linear features using a localized radon transform with a wavelet filter

Description: One problem of interest to the oceanic engineering community is the detection and enhancement of internal wakes in open water synthetic aperture radar (SAR) images. Internal wakes, which occur when a ship travels in a stratified medium, have a V shape extending from the ship, and a chirp-like feature across each arm. The Radon transform has been applied to the detection and the enhancement problems in internal wake images to account for the linear features while the wavelet transform has been a… more
Date: December 13, 1999
Creator: Warrick, A L & Delaney, P A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface and borehole electromagnetic imaging of conducting contaminant plumes

Description: Electromagnetic induction tomography is a promising new tool for imaging electrical conductivity variations in the earth. The EM source field is produced by induction coil (magnetic dipole) transmitters deployed at the surface or in boreholes. Vertical and horizontal component magnetic field detectors are deployed in other boreholes or on the surface. Sources and receivers are typically deployed in a configuration surrounding the region of interest. The goal of this procedure is to image electr… more
Date: July 1, 1998
Creator: Berryman, J. G., LLNL
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

San Juan Fracture Characterization Project: Status and current results

Description: The overall objectives of this report are to extend current state-of-the-art 3-D imaging to extract the optimal information for fracture quantification and to develop next generation capability in fracture imaging for true 3-D imaging of the static and dynamic fracture properties.
Date: February 26, 2001
Creator: Majer, E. L.; Daley, T. M.; Myer, L. R.; Nihei, K.; Queen, J.; Sinton, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High resolution photoelectron images and D{sup +} photofragment images following 532-nm photolysis of D{sub 2}

Description: The non-resonant ionization and dissociation of D{sub 2} by intense 532-nm laser light is studied by a variation of the ``Ion Imaging`` technique called ``Velocity Mapping``. Images of the both the photoelectrons and D{sup +} photofragments are obtained and analyzed at two different laser intensities. Results are compared to previous studies and several differences are discussed.
Date: January 1, 1998
Creator: Chandler, D.W.; Neyer, D.W. & Heck, A.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen