Citations Only: Recent submissions
Now showing items 541-560 of 990
-
Morphological granulometric analysis of electrophotographic images--size distribution statistics for process control
(The Society of Photo-Instrumentation Engineers (SPIE), 1991-04-01)Size distributions of particles within a binary image can be generated by morphological filtering processes known as granulometries. Granulometries filter the image by structuring elements of ever-increasing size, the ... -
Extended tasks elicit complex eye movement patterns
(Association for Computing Machinery., 2000-11-06)Visual perception is an inherently complex task, yet the bulk of studies in the past were undertaken with subjects performing relatively simple tasks under reduced laboratory conditions. In the research reported here, ... -
Fast computing of color matching by means of matrix representation. Part 1: Transmission-type colorant
(Optical Society of America, 1971) -
Effect of I– impurity on the efficiency of silver cluster formation on AgBr microcrystal surfaces
(American Institute of Physics, 1999-08-01)Computer simulation is used to study the effect of iodide impurity on silver cluster formation on AgBr microcrystals. The simulation is based on a nucleation-and-growth model of silver cluster formation in competition with ... -
Clustering approach to bone and soft tissue segmentation of digital radiographic images of extremities
(International Society for Optical Engineering (SPIE), 2003-01)We present an algorithm for segmentation of computed radiography (CR) images of extremities into bone and soft tissue regions. The algorithm is region-based in which the regions are constructed using a region-growing ... -
Morphological texture-based maximum-likelihood pixel classification bbased on local granulometric moments
(Elsevier Science B.V., Amsterdam, 1992-10)Morphological granulometries are one-parameter filter sequences that monotonically decrease image area. A size distribution is generated by measuring the residual area after each iteration of the filter sequence. Normalization ... -
Spectral color matching by means of minimax approximation
(Optical Society of America, 1972-11) -
Structure of three-component microemulsions in the critical region determined by small-angle neutron scattering
(American Physical Society, 1984-04)The intensity distribution of the critical scattering from sodium di-2-ethylhexylsulfosuccinate AOT-D2O-n-alkane water-in-oil (W/O) microemulsions has been measured over an extensive range of droplet volume fractions (3-30 ... -
Attractive interactions in micelles and microemulsions
(American Physical Society, 1984-08-06)We have used small-angle neutron scattering to study surfactant interactions in an inverted micellar and a related microemulsions system. The structure-factor fits imply an attractive interaction between micelles with a ... -
Time-course of chromatic adaptation for color-appearance judgments
(Optical Society of America, 1995-05)Observer production of achromatic appearance has previously been used to measure the time course of chromatic adaptation for changes from daylight to incandescent illuminants at constant luminance, indicating an exponential ... -
Two-dimensional complex Fourier-transform via the radon-transform
(Optical Society of America, 1985-11)A hybrid system has been constructed to perform the complex Fourier transform of real two-dimensional data. The system is based on the Radon transform; i.e., operations are performed on one-dimensional projections of the ... -
Error diffusion in cell-oriented Fourier-transform computer-generated holograms to compensate for printing constraints
(Taylor & Francis, 1996-06-01)Error-diffused quantization has been applied to the generation of cell-oriented computer-generated Fourier transform holograms, resulting in reduced reconstruction errors. Improvements are demonstrated when applied to the ... -
A Near stellar occultation by P/Grigg-Skjellerup
(International Society for Optical Engineering (SPIE), 1994-03)P/Grigg-Skjellerup was observed to pass within 200 km of the line of sight to an anonymous faint star on the 1992 July 8 UT. The star's brightness was attenuated by 35% at closest approach by the comet. This result, combined ... -
Characterization of a large-format charge-coupled device
(International Society for Optical Engineering (SPIE), 1995-01)Characterization of a Kodak KAF 4200 CCD chip, coated with the UV converter Lumigen, is described. This chip is very similar to a chip described by Ninkov, Backer, and Bretz [Proc. SPIE 1987, 14 (1 993)], except for the ... -
Fast algorithms for phase and magnitude reconstruction from bispectra
(International Society for Optical Engineering (SPIE), 1990-05)Techniques are developed for signal reconstruction from samples of the bispectrum of a 1-D or 2-D signal. The phase and magnitude of the Fourier transform of a signal as well as those of the bispectrum are expanded into ... -
Practical algorithm for the inversion of an experimental input-output color map for color correction
(International Society for Optical Engineering (SPIE), 2003-03)We introduce the iteratively clustered interpolation algorithm to compute a structured printer inverse look-up table from irregularly sampled experimental color data. The algorithm is based on a gradient optimization ... -
Colorimetric characterization of a desktop drum scanner using a spectral model
(International Society for Optical Engineering (SPIE), 1995-10-01)A desktop drum scanner was colorimetrically characterized to an average CIELAB error of less than unity for Kodak Ektachrome transparencies and Ektacolor paper, and Fuji Photo Film Fuflchrome transparencies and Fujicolor ... -
Characterization methods for LCD devices with crosstalk issues
(Society for Information Display, 2005-05)An approach is introduced for building accurate and compact color look-up tables (CLUTs) to describe the colorimetric performance of liquid crystal display (LCD) devices. In an experiment, a novel analysis technique was ... -
Cathode-ray-tube to reflection-print matching under mixed chromatic adaptation using RLAB
(International Society for Optical Engineering (SPIE), 1995-10-01)Color-appearance models are used to relate chromatic stimuli viewed under one set of viewing and illuminating conditions to a differing set such that when each stimulus is viewed in its respective conditions, the stimuli ... -
Accurate color reproduction of CRT: displayed images as projected 35mm slides
(International Society for Optical Engineering (SPIE), 1996-01-01)Accurate color reproduction of images presented on a computer-controlled CRT display as projected 35-mm transparencies is a complicated procedure requiring the characterization and control of several imaging processes and ...