About Chandra Archive Proposer Instruments & Calibration Newsletters Data Analysis HelpDesk Calibration Database NASA Archives & Centers Chandra Science Links

Skip the navigation links
Last modified: 11 August 2006

URL: http://cxc.harvard.edu/ciao3.4/survey/responses/imgreason.html
Hardcopy (PDF): A4 | Letter

Reasons for using one particular image display application

Back to the Survey
9 - issues above

13 - ds9 can read in event lists directly; karma can only handle images.

18 - ds9 crashes when viewing a level 1.5 file.

21 - DS9 is best for images, IDL for 1-D plots, Illustrator for editing
     postscript files, etc.

22 - Gaia is better at contouring, in my opinion than ds9, so I use
     Gaia for contouring.  I work with both radio and X-ray wavebands, so
     its easier for me to use aipsview when I'm working with AIPS and ds9
     when I'm working with CIAO tools.

23 - Aladin is the standard Vizier tool for accessing the DSS.

25 - To make up for the various idiosyncratic deficiencies of each particular system.

27 - To take this opportunity, I would like to note that a small but appreciable
     percentage of population in the U.S. alone is color-blind. Therefore, color-coding
     usage in any survey should not be performed (such as below).

28 - I use ds9 most regularly to look at images, but I use IDL to make
     publication-quality images.

31 - If I'm working in IDL, I don't know how to display "live" to 
     ds9, so I use IDL image display, which is sort of clunky.

35 - I'm not an imaging person.

38 - there is none that does everything, right?

43 - isis/pgplot: integrated with analysis s/w.  provides most needed
     capability most of the time.

     ds9 occassionally for interactive display control, better support
     for  binned images.  User for inspection, not for output or
     scripts.  But annoying segv's on grating data require use of 
     otherprograms. 

     IDL: large suite of visualization functions; surface, volume; 3D
     projections, w/ contour or image overlays.

     xv: to scroll through a collection of output in gif or jpeg format,
     or to edit (small) colormaps.

47 - DS9 is good for quick looks but that's about it. For fine scale work and
     publication quality output, I use IDL because it provides the level of
     control necessary.

52 - ds9 works super for immediate image display of my FITS images/evt lists.
     IDL makes pretty plots, especially with help from routines in PINTofALE. 

62 - Each image display is good for different image format:
     ds9 is best for FITS, fv is best to view images headers,
     xv is best to view images not in FITS format

63 - Some are interfaced with the web (Aladin), and some handle image
     manipulation well (xv).

67 - See above.  One is used for anlysis, the other for "qualitative"
     work such as preparing a picture with good colors and contrast.

70 - ds9 is great to view the image, select regions, etc. (i.e. everything
     for scientific analysis) but WIP or IDL are used to produce
     publication quality postscript file

77 - use the best tool for the job, instead of trying to do everything
     with one monolithic system (which is exactly why I like the
     ibis, idl, and ftools way better than the xmmsas or ciao)

81 - to do various tasks (eg make a cartoon diagram or figure; display
     spectra and models

82 - Difficult to make journal quality images. IDL whips the pants off
     DS9 when one wants to add axis labels, fonts, etc.

83 - overlaying the images

84 - none can do everything I need it to do.

90 - Different displays handle different types of data better.  The AIPS TV
     is wonderful for radio analysis, but I'd never attempt to use it for
     pixelized X-ray analysis.  I really only use ds9 for my X-ray analysis
     now.

102 - Life is diverse. Our needs are as well. It is NOT necessary to
      have a software which does EVERYTHING. I'd rather have a software
      which works even on a limited number of problems that a monolith of
      code supposed to solve all the problems but which does not work...

103 - ds9 has many astronomical features which are indispensable. ds9
      or something like it should be improved to allow more user interaction
      with data.

106 - I use ds9 generally, but I use gaia if I need to fix the astrometry of an image.

107 - I use also IDL because you can act on the evt file and imediatly
      visualize the effect.

111 - paw allows custom image manipulation (with fortran subroutines)

112 - compatibility with working environment. ds9 is limited to fits files.

113 - POW is launched by fv
      xv is best suited to deal with GIF,JPEG, and other compressed formats

119 - Better ability to see directly into fits files (FV)
      Need to support user-personalized software (IDL)

121 - compare the optical and X-ray images

124 - Every display system has its deficiencies.  DS9 is pretty good, though.

126 - The CMYK images that come out of ds9 are sometimes horrendously
      ugly color schemes.

Back to the Survey
Hardcopy (PDF): A4 | Letter
Last modified: 11 August 2006


The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory.
60 Garden Street, Cambridge, MA 02138 USA.    Email: cxcweb@head.cfa.harvard.edu
Smithsonian Institution, Copyright © 1998-2004. All rights reserved.