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Дата изменения: Fri Feb 23 14:01:57 1996
Дата индексирования: Tue Oct 2 17:03:37 2012
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List of Figures
A dark current CCD exposure with cosmic ray events which are removed with non--linear filters. (A) original, (B) 5*5 median filter, (C) 5*1 median filter, and (D) 5*1 recursive filter.
Removal of cosmic ray events on a CCD spectral exposure with different techniques: (A) original, (B)
median filter, (C)
recursive filter and (D) stack comparison.
Removal of artifacts on CCD exposures (A,B,C) of the galaxy A0526--16 by stacking the frames yielding the combined image (D).
A density--intensity transformation curve for a photographic emulsion using normal densities (A) and Backer densities (B).
A dispersion curve (A) for an IDS spectrum with the linear term omitted. The spectrum rebinned to wavelength is shown with (B1) and without the Jacobian determinant correction (B2).
Different digital filters applied on a CCD image: (A) original, (B) block filter, (C) smooth filter, and (D) Laplacian filter.
Removal of stars from a CCD frame of Comet Halley: (A) original, (B)
median filter, (C)
recursive filter, and (D) both recursive
filter and a
median filter.
Background fitting with an iterative
technique: (A) original, (B) mask of included areas, and (C) fitted background.
The radial profile of an elliptical galaxy shown with linear steps (A) and rebinned to
increments (B).
Azimuthal profile in the inner parts of a spiral galaxy A0526--16 across the spiral arms (A). The amplitude of the Fourier transform (B) of this profile shows the strong even frequencies.
Deconvolution a photographic image with the Lucy method: (A) original and (B) restored image after 3 iterations.
Two normalized early type spectra used as template (A1) and object (A2) yield the cross--correlation function (B).
Correlation between two measures of the inclination angle of galaxies: (A) with angle
i
as variable, and (B) with
.
Romafot reduction scheme
Romafot procedure to determine accuracy and degree of completeness
Romafot procedure to transfer inputs to other program frames
Echelle Reduction Scheme
Images BARS, OFFBARS, BARS30 and BARS60.
Images RINGS and OFFRINGS.
Plot of sky brightness as a function of time
Schematic flowchart for reductions
Sample drift plot
Morlet's wavelet: real part at left and imaginary part at right.
Mexican Hat
The filter bank associated with the multiresolution analysis
Wavelet transform representation of an image
linear interpolation
Wavelet
Passage from
to
, and from
to
.
Passage from
to
.
Pyramidal Structure
Galaxy NGC2297
Superposition of all the scales. This image is obtained by the command
visual/cube
.
Superposition of all the scales. Each scale is plotted in a 3 dimensional representation. This image is obtained by the command
visual/pers
.
Synthesis image (command
visual/synt
). Each scale is binarized, and represented by one gray level.
One contour per scale is plotted (command
visual/cont
).
Superposition of all the scales. This image is obtained by the command
visual/cube
.
Superposition of all the scales. Each scale is plotted in a 3 dim. representation. This image is obtained by the command
visual/pers
.
Synthesis image (command
visual/synt
).
Synthesis image (command
visual/synt
). Each scale is normalized.
Correlation.
Signal to noise ratio.
Trend analysis of the detector mean temperature with Modified Julian Date
Association of DARK exposures with scientific frames
Association of FF exposures with scientific frames
Response/Echelle
Reduce/Echelle (1)
Reduce/Echelle (2)
Main window of the GUI XLong
Panels for Open and Save As... options of the menu File
Search Window
Lines Identification Window
Wavelength Calibration window
Resampling Window
Spectrum Extraction window
Flux Calibration window
Batch Reduction window
Pascal Ballester
Tue Mar 28 16:52:29 MET DST 1995