spydr - Online in the Cloud

PROGRAM:

NAME

spydr - GUI for Image display and analysis with yorick

SYNOPSIS

Spydr (pronounce spider) can be invoqued from the shell
spydr [ options ] image1.fits [ image2.fits ... ]
where the fits images can contain single images (not necessarily of the same size) or
data cube. Widlcards are allowed in names.

or within yorick
#include spydr.i
spydr,im1,im2,cube
spydr,"image1.fits",...

COMMAND LINE OPTIONS

--conf file
configuration file.

--hdu value
Specify a fits HDU to read

--dpi value
Yorick dpi value (yorick default = 75, spydr default = 83). Any value between 30
and 150 make sense.

--itt value
Intensity Transfer Table (1=linear, 2=sqrt, 3=square, 4=log, 5=hist equalized)

--pixsize value
Pixel size (or plate scale) in arcsec.

--boxsize value
Size of box for PSF fitting and Strehl calculation (pixels)

--saturation value
Value above which pixels have to be considered as saturated (ADU)

--wavelength value
Force wavelength for all images

--zeropoint value
Photometric zeropoint (magnitude)

--nbins value
Number of bins for histograms

--strehlaper value
Diameter of circular mask for Strehl calculations (pixels). The flux is integrated
in a circle of this diameter, while the sky is estimated from the remaining pixels
within the box of size "boxsize"

--batch
Turn on yorick batch mode (yorick quits when encountering an error). This flag is
recommended when starting spydr from a non-interactive session (e.g. from a gnome
applet).

--debug
Turn on the verbose mode (debugging mode).

--invert
Invert LUT

--fullgui
Show the plugin pane when the GUI is realized

--compact
Hide the lower part of the GUI at startup

DESCRIPTION

Spydr is a GUI for image visualization and simple analysis (cuts, zoom, values,
statistics, histogram, sigma filter) with changeable LUT and ITT. Spydr has a couple of
plugins to measure FWHM and Strehl. Press "?" on the main display area to get a popup
help:

The following shortcuts are available:
x/y: Plot line/column under cursor
X/Y: Toggle continuous plot of line/column
under cursor
c: Interactive plot of cut across image
h: Plot histogram of visible region
r: Radial plot centered on cursor
f: Fit 1d gaussian to 1d plot
e: Adjust min and max cut to 10% and 99.9%
of distribution
E: Reset min and max cut to min and max
of visible region
n/p: Next/prevous image
s: Sigma filter displayed image
-/+: Decrease/Increase zoom factor in zoom window
?: This help

EXAMPLES

From the shell:
$ spydr --dpi 74 --fullgui 20070730_2*.fits
$ spydr --pixsize 0.127 20070730_2[2-3]?.fits 20070730_241.fits

Within yorick:
> spydr,"~/ascam/2007jun26/20070625T2000*.fits"
> spydr,["20070730_1[1-3].fits","20070730_23.fits"]
> spydr,image
> spydr,[im1,im2]
> spydr,im1,im2

ENVIRONMENT VARIABLES

Y_PYTHON
Force the path to spydr.py. The default path is

./:Y_USER:Y_USER/python/:Y_SITES/python/:Y_SITE/python/

Y_GLADE
Force the path to spydr.glade. The default path is

./:Y_USER:Y_USER/glade/:Y_SITES/glade/:Y_SITE/glade/

Y_CONF Force the path to spydr.conf. The default path is

./:Y_USER:Y_SITE:/etc/:
./share/:Y_USER/share/:Y_SITE/share/:
./share/spydr/:Y_USER/share/spydr/:Y_SITE/share/spydr/

RESTRICTIONS AND BUGS

- only fits images handled to date
- the ITT display is not very well handled

Use spydr online using onworks.net services