Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Neal C. Gallagher"'
Publikováno v:
IEEE Transactions on Image Processing. 9:923-935
In this paper, we introduce two novel techniques for digital color halftoning with green-noise--stochastic dither patterns generated by homogeneously distributing minority pixel clusters. The first technique employs error diffusion with output-depend
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a4c906c7ac19b3138bf2fb6604d2f80
https://doi.org/10.1109/83.841537
https://doi.org/10.1109/83.841537
Publikováno v:
IEEE Transactions on Signal Processing. 48:489-498
Digital decimation filters play a fundamental role in oversampled sigma-delta A/D decoders. In this paper, we first show that weighted median (WM) filtering of a demodulated sequence (at the Nyquist rate) can be implemented concurrently in the A/D de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc9725ffebbba02cfaf2b4f69d94ef6c
https://doi.org/10.1109/78.823975
https://doi.org/10.1109/78.823975
Publikováno v:
Proceedings of the IEEE. 86:2424-2444
In this paper, we introduce the concept of green noise-the multifrequency component of white noise-and its advantages over blue noise for digital halftoning. Unlike blue-noise dither patterns, which are composed exclusively of isolated pixels, green-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8161895c912032bf820ae1e1ba6a67c5
https://doi.org/10.1109/5.735449
https://doi.org/10.1109/5.735449
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 46:1856-1867
In a bounded region such as a waveguide, a mode is an eigensolution of the electromagnetic-wave equation with particular boundary conditions imposed. Conversion from one mode to another through a mode converter could be accomplished by using a scatte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::781226f1aaf1acd0b27032cd48d9cc67
https://doi.org/10.1109/22.734500
https://doi.org/10.1109/22.734500
Publikováno v:
Microwave and Optical Technology Letters. 13:251-255
The scattering optimization method is utilized to design compact circular waveguide mode converters, which are compared with some earlier designs. This approach is used to design a TE11 to TM11 mode converter at 9.94 GHz, which was subsequently fabri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::776f56c0a0aa73332c63f70ef6d363a6
https://doi.org/10.1002/(sici)1098-2760(19961205)13:5<251::aid-mop3>3.0.co
https://doi.org/10.1002/(sici)1098-2760(19961205)13:5<251::aid-mop3>3.0.co
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 43:559-565
A method for the design of compact and efficient mode converters for waveguides is presented. The required mode converter is modeled in the form of a scatterer placed in the waveguide and then its surface profile is optimized for maximum excitation o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c718d818a23c1edb7f3198e2b7d76156
https://doi.org/10.1109/22.372101
https://doi.org/10.1109/22.372101
Publikováno v:
Signal Processing. 38:317-329
The basic design of a general purpose digital phase lock loop is improved upon by incorporating a stack filter into the feedback path of the loop. The addition of a stack filter provides enhanced performance in the presence of impulsive noise while p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::558be05371b50283130f9e7e1bd64145
https://doi.org/10.1016/0165-1684(94)90152-x
https://doi.org/10.1016/0165-1684(94)90152-x
Autor:
Neal C. Gallagher, R.W. Hawley
Publikováno v:
IEEE Transactions on Signal Processing. 42:2045-2054
The Edgeworth (1887) algorithm for minimizing absolute error is known to suffer from convergence problems when the data contains degeneracies. In this paper, it is shown that for the particular problem of fitting a line to a set of uniformly sampled
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cd6ff35321b87c990e3409decd3acbc
https://doi.org/10.1109/78.301827
https://doi.org/10.1109/78.301827
Autor:
Neal C. Gallagher, Robert W. Hawley
Publikováno v:
Applied optics. 29(2)
Current pattern data formats for electron beam lithography are specifically designed to meet the needs of the VLSI industry. As a result, pattern data file size is often the limiting factor in the production of a binary computer generated hologram an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d940742b376ef0c3c8f1ce05907b8fee
https://pubmed.ncbi.nlm.nih.gov/20556089
https://pubmed.ncbi.nlm.nih.gov/20556089
Autor:
Allen J. W. Whang, Neal C. Gallagher
Publikováno v:
Applied optics. 27(16)
The objective of this study is twofold: to design reticle patterns with desirable alignment properties; to build an automatic alignment system using these patterns. We design such reticle patterns via a synthetic approach; the resultant patterns, so-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9733f0345d1971ebf84743e7900e50c
https://pubmed.ncbi.nlm.nih.gov/20539412
https://pubmed.ncbi.nlm.nih.gov/20539412