Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Ellen Ochoa"'
Autor:
M. Justin Wilkinson, Curtis Brown, Scott Parazynski, Cynthia A. Evans, David L. Amsbury, Susan Runco, Mary Fae McKay, Joseph Tanner, Kamlesh Lulla, Donald R. McMonagle, Ellen Ochoa, Jean‐Francois Clervoy
Publikováno v:
Geocarto International. 10:91-104
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f88e9ea444bd5046bb35837158c8b31
https://doi.org/10.1080/10106049509354516
https://doi.org/10.1080/10106049509354516
Publikováno v:
SPIE Proceedings.
The development status of optical processing techniques under development at NASA-JPL, NASA-Ames, and NASA-Johnson, is evaluated with a view to their potential applications in future NASA planetary exploration missions. It is projected that such opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd638b53df24e6a9341ec1bd5edcf046
https://doi.org/10.1117/12.962234
https://doi.org/10.1117/12.962234
Publikováno v:
Applied Optics. 29:1209
A modified binary synthetic discriminant function filter designed to recognize objects over a range of rotated views has been verified on a laboratory optical correlator. A binary synthetic discriminant function filter has been previously described t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f89d7a0f7b65eb746cf328263b1a9f8
https://doi.org/10.1364/ao.29.001209
https://doi.org/10.1364/ao.29.001209
Publikováno v:
SPIE Proceedings.
The low-level insertion losses have been measured for uv grade CaF2 and MgF2 using the multipass reflectometer. These losses include surface absorption and surface losses as well as bulk absorption. Comparing our data with absorption measured by calo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a706e4d18e47cbb075f06d2d27bb2496
https://doi.org/10.1117/12.932017
https://doi.org/10.1117/12.932017
Publikováno v:
Annual Meeting Optical Society of America.
A method is presented to enhance defects in periodic objects in real time. A low-intensity reference wave interferes with the Fourier transform of an object beam to form a hologram in a photorefractive crystal. The nonlinear properties of the crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01c24714c64d17a0d9a732c7d287791a
https://doi.org/10.1364/oam.1985.tuk7
https://doi.org/10.1364/oam.1985.tuk7
Publikováno v:
Optical Engineering. 27
We have previously designed correlation filters that detect multiple views of an object while remaining specific to the object. We now present a method of modifying the filters to reject clutter, which is defined as additive structured noise. The clu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62ace7eb758b1fc0863a4b00036a5f18
https://doi.org/10.1117/12.7976669
https://doi.org/10.1117/12.7976669
Publikováno v:
Annual Meeting Optical Society of America.
An iteratively designed correlation filter Is used in a coherent optical system to perform recognition of targets independent of their position, rotation, or intensity. A full 3-D correlation operation is obtained by rotating the filter in the Fourie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::385734af05a3e37b6723e582e4ed3917
https://doi.org/10.1364/oam.1986.the2
https://doi.org/10.1364/oam.1986.the2
Publikováno v:
Annual Meeting Optical Society of America.
Median filters are widely used in image processing because they remove impulsive noise while preserving edges. They are one example of a class of filter known as order statistic filters which require a ranking of pixels within the filter window. When
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba01aa804b95024f84a1b66c9fc8fd7b
https://doi.org/10.1364/oam.1986.md4
https://doi.org/10.1364/oam.1986.md4
Publikováno v:
SPIE Proceedings.
A real-time method to enhance defects in periodic objects is described. Using four-wave mixing techniques, a hologram is nonlinearly recorded in photorefractive BSO so that read-out results in suppression of the periodic structure and enhancement of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26f4765e76183c3086d1ce6ab34ec378
https://doi.org/10.1117/12.960409
https://doi.org/10.1117/12.960409
Publikováno v:
Annual Meeting Optical Society of America.
There are different requirements on the specificity of a correlation filter used for optical pattern recognition that depend on the particular application. For example, in industrial inspection, small differences between objects are important so the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb83ef9b1f29163d868e121f043ea4fd
https://doi.org/10.1364/oam.1987.ma3
https://doi.org/10.1364/oam.1987.ma3