Next: Comparison using a Up: Noise reduction from Previous: Adaptive filtering from . In the previous algorithm we do not use the hierarchy of structures. We have explored many approaches for introducing a non-linear hierarchical law in the adaptive filtering and we found that the best way was to link the threshold to the wavelet coefficient of the previous plane . ... The function must return a value between 0 and 1. ... Pascal Ballester . Tue Mar 28 16:52:29 MET DST 1995 ...

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• Adaptive filtering from the wavelet transform

... Archives . ... Please, do not confuse adaptive filter (hereafter, AF ) with adaptive optics (hereafter, AO ). ... Not just the hardware part, but I was interested in how astronomers have applied theories and algorithms of AF to acquire cleaner data that are processed with speed and efficiency. ... A long story short, against my expectation for frequent allusion from ADS, adaptive filter turned out to be almost [MADS]. ... Tags: adaptive filter , adaptive optics , MADS . ... Comment ( RSS ) | ...

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• The AstroStat Slog adaptive filter
• The AstroStat Slog adaptive optics
• The AstroStat Slog spatial statistics

... This paper presents a regularized least squares algorithm for the restoration and reconstruction of images. A whitening filter of short length provides the regularization function. An adaptive version of the algorithm is developed by matching a weighting function to the regularization function. The adaptive regularization simultaneously leads to proper noise suppression and enhanced resolution of discontinuities. ... Restoration Based on Adaptively Weighted Regularization . ...

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• Optimization of the Regularization Function
• Bundschuh, Schneider, Schulz: Adaptive Least Squares Image Restoration
• The Wavelet Transform

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Parkes | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• Adaptive Filter (schematic)
• Pre- and Post-Correlation filters
• Index

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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... A new and powerful methodology for treating noise and clutter in astronomical images is described. ... trous wavelet transform, and the multiresolution support data structure. ... Figure 2: Top row: original noisy spectrum; filtered spectrum using the multiresolution support method; both superimposed. ... Figure 5 shows an image filtered by the wavelet transform (Starck and Pierre 1997a). ... Figure 5: ROSAT image of the cluster A2390 filtered by the method based on wavelet coefficients. ...

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• Improvements in Filter Design for Removing Galactic ``Cirrus'' from IRAS Images
• Structure Detection in Low Intensity X-Ray Images using the Wavelet Transform
• A New Entropy Measure Based on Multiple Resolution and Noise Modeling

... Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. ... Technical Basis of the Meade Broadband Nebular Filter: As shown in the transmission graph below, the Meade Broadband Nebular Filter strongly rejects the light of sodium- and mercury-vapor lights as well as natural airglow and auroral emissions. ... Meade Series 4000 Narrowband Nebular Filters . ... Meade Series 4000 Oxygen-III Nebular Filters . ... Meade Series 4000 Photo-Visual Color Filters . ...

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• Meade Series 4000 Photo-Visual Color Filters
• Blocking Filters - Coronado€о Solar - Products
• Meade Instruments Corporation - Pictor 616A Color Filter System

... Meta Index / Home Page / DSS utilities . ... This is similar to RangeT except that no type is given for the upper and lower bounds. Where I have translated GTIs into ranges (see for example section 9.6.3 ) I have taken the lower GTI bound to be INCLUSIVE and the upper to be EXCLUSIVE. ... For each GTI in the sequence, the upper bound value must exceed the lower bound value. For all i from 1 to N-1, the upper bound of GTI i must be less than the lower bound of GTI i+1. ... See also section 16 . ...

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This home page belongs to small group of scientists working at . Sternberg Astronomical Institute which is a part of Moscow State University . ... Электронная библиотека научно-технической и художественной литературы (доступна только из ГАИШ) . ... Local staff . Dr. Edward Kononovich (konon -at- sai.msu.ru), Associate Professor . ... Dr. Sergey Ayukov (asv -at- sai.msu.ru), Research Fellow, Webmaster of the group . ... Joint seminar of Solar Studies Structure Group and Solar Photometry Group . ...

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• Wavelets and equations
• Feature enhancement: filtering and denoising
• Wavelet Resources

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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• ASP: Beacons in the Gloom

... Staff . ... Friends of Arcetri . ... Arcetri designs innovative superconductor microwave filters for the Sardinia Ratio Telescope . ... A new microwave component based on HTS technology has been presented in a recent issue of the Journal of Astronomical Instrumentation, produced by World Scientific Publishing Company, in the article тАЬ A high temperature superconductor microwave filter working in C-band for the Sardinia Radio Telescope тАЭ by Pietro Bolli and collaborators (Fig.1). ...

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• Filters - Apache HTTP Server
• The ALMA project
• Venus - Galileo

RTT150 . Russian-Turkish 1.5-m Telescope . ... Until 2002 observations were mostly performed with ST-8E CCD in the 1:7.7 Cassegrain focus. ... In April, 2003 telescope was equipped with a larger-size CCD Andor DW436 . ... 2048 x 2048 pixels, . ... Since summer of 2002 the main focal detector of the RTT150 telescope was AP47p CCD in 1:7.7 Cassegrain focus. ... During September 3-13, 2002 works on installation of new autoguiding system ( photo 1 ) were carried out on RTT150 telescope. ...

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... 12.07.07 Nando - Test the magnitude of aperture corrections to Landoldt Apertures. ... 12.07.07 Palle - Write up some suggestions for tests to verify which FORS/UT combinations really have rotating features. Original text: Sabine's flatfield versus rotators angle look promising, but more tests should be done which do not depend on the structure looking like a finger. ... The halves could be either ordered by rot-angle (e.g. 0-180 together, 180-360 together), or totally random. ...

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• The VLT Records Faint Structures in Colliding Galaxies | ESO
• ESO - A number of OmegaCAM filters show vignetting in their central regions.
• Filamentary Structures in NGC 1097 | ESO

Metamaterial bandpass structures made of two-dimensional arrays of planar resonators Mikhail A.Tarasova, Artem M.Chekushkinb, Valerian S.Edelmanc, and Leonid S.Kuzmin a V.Kotel'nikov Institute of Radio Engineering and Electronics, Moscow, Russia b Chalmers University of Technology, Gothenburg, Sweden c P.Kapitza Institute for Physical problems b Abstract--Planar arrays of /2 open crosses designed for quasioptical filters in 300, 350, 450, 600 GHz bands were fabricated and experimentally studied. ...

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• http://www.cplire.ru/html/lab234/pubs/2014_25.pdf
• Chaotic Processors and Unstructured Data Bases - NDCS-99

M1 is also known as the Crab Nebula. It is a remant of a supernova that occured in 1054 AD. The central star is actually a rotating neutron star and is called a pulsar. This exposure was taken through a narrow band H-alpha filter to make the filamentary structure stand out somewhat.

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• Astro-2 and the UIT Experiment
• Astronomy HyperText Book: Stellar Evolution
• CCD Astronomy Magazine Article Page 4

... Dark current e - /s/pix . ... OH continuum photon/s/m 2 /arcsec 2 / m . ... Imager: . ... Adaptive Optics: . ... Object signal e - /pix . Sky thermal signal e - /pix . Sky OH continuum signal e - /pix . Sky OH line signal e - /pix . Telescope thermal signal e - /pix . AOS thermal signal e - /pix . Cryostat signal e - /pix . Dark signal e - /pix . Total signal e - /pix . ... This tool models the performance of the Gemini South Adaptive Optics Imager (GSAOI) . ...

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• GSAOI Component Supplier Links Page
• Filter Throughput Curves
• Observational Techniques Home Page

... It contains 2 (1 for each polarization) by 4 separate filters that are switch able via the computer. filter 1 is a motor driven tuneable filter covering 1000 to 2000 Mhz with a 2% bandwidth. filter 2 is a ??? . ... An hp34907 dac generates a voltage that corresponds to the requested frequency. ... It steps the filter from 1000 to 2000 Mhz in 25 Mhz steps. ... You now have 41 requested voltages and measured frequencies going from 1000 to 2000 Mhz. ... 20 Mhz) when fit over the 1000 to 2000 Mhz range....

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• pdev_birdies_25jun07
• lowpass digital fitlers
• Power line filters

... Class . ... Package Hierarchies: . ... ij.plugin.filter. Analyzer (implements ij.measure. ... PlugInFilter ) . ... AVI_Writer (implements ij.plugin.filter. ... BackgroundSubtracter (implements ij.gui. DialogListener , ij.plugin.filter. ExtendedPlugInFilter ) . ... Benchmark (implements ij.plugin.filter. ... Binary (implements ij.gui. ... CalibrationBar (implements ij.plugin.filter. ... Convolver (implements java.awt.event.ActionListener, ij.gui. ... Duplicater (implements ij.plugin.filter. ...

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• Filters (ImageJ API)
• FFTFilter (ImageJ API)
• UnsharpMask (ImageJ API)

Stellarium 0.12.3 . ... Classes . ... FileљStructure . ClassљList . ClassљIndex . ClassљHierarchy . ... ShortcutsFilterModel Class Reference . Custom filter class for filtering tree sub-items. More... #include < ShortcutsDialog.hpp > . ... filterAcceptsRow (int source_row, const QModelIndex &source_parent) const . ... The standard QSortFilterProxyModel shows child items only if the parent item matches the filter.) Definition at line 43 of file ShortcutsDialog.hpp . ...

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• Stellarium: TextureParams Struct Reference
• Stellarium: SatellitesListFilterModel Class Reference
• Stellarium: Member List

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

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