Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Donald L. Durack"'
Autor:
Donald L. Durack
Publikováno v:
Propagation Engineering: Fourth in a Series.
The iterative expectation-maximization (EM) algorithm for identifying unknown blur, noise, and image parameters under Gaussian modeling assumptions is described. A new form of the equations updating parameter estimates is given, from which convergenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf8bd3e744cb1138e6d48b97a6877293
https://doi.org/10.1117/12.46551
https://doi.org/10.1117/12.46551
Autor:
Donald L. Durack, Michael T. Valley
Publikováno v:
Propagation Engineering: Third in a Series.
The residual image is analyzed to determine a constraint which regularizes the ill-posed least squares image restoration problem. The energy in the residual image is constrained at a level which depends on the noise statistics, image degradation, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1723e64be47dabbe52c6b272b09ec432
https://doi.org/10.1117/12.21868
https://doi.org/10.1117/12.21868
Autor:
Donald L. Durack
Publikováno v:
Propagation Engineering.
Standard measures of image quality are used to quantify the effect of atmospheric turbulence on specific target and background signatures from digital images. The degraded signature corresponding to any atmospheric coherence diameter can be computed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e575fd8aa00db92ed5f27122b8a0ffb4
https://doi.org/10.1117/12.960862
https://doi.org/10.1117/12.960862
Autor:
Donald L. Durack, Michael K. Giles
Publikováno v:
Optical, Infrared, Millimeter Wave Propagation Engineering.
A model of long-exposure image blur due to atmospheric turbulence has been developed using a parallel processor to convolve the input image with the turbulence point spread function (PSF). The model uses two basic dimensionless parameters--the turbul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::634888b48733eeb819a6699a50cea580
https://doi.org/10.1117/12.945788
https://doi.org/10.1117/12.945788
Autor:
Donald L. Durack, Michael K. Giles
Publikováno v:
Optical, Infrared, Millimeter Wave Propagation Engineering.
This paper presents an approach to modeling effects of atmospheric turbulence in digital images, which allows variation in the atmospheric coherence diameter over the field-of-view. Characteristics of the imaging system are used in deriving a digital
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1705088033fe0d27a56886e92863e955
https://doi.org/10.1117/12.945787
https://doi.org/10.1117/12.945787
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