TV Display Procedures pro/tv August 2000 The procedures in this directory involve the use of the (usually X windows) image display. BLINK - Blink two or more windows in an image display CURS - Change the shape of the (X windows only) cursor CURVAL - Interactive display of image intensities and astronomical coordinates PIXCOLOR - Set specified pixel values to a specified color SIGRANGE() - Find range of pixel values which contain 99% of the image values TVBOX - Draw a box of specified size on the image display TVCIRCLE - Draw a circle of specified radius on the image display TVELLIPSE - Draw an ellipse of specified axes on the image display TVLASER - Write an image to postscript file with annotation from a FITS header TVLIST - Display intensity values surrounding the cursor position UNZOOM_XY - Convert from window coordinates to image coordinates ZOOM_XY - Convert from image coordinates to window coordinates Notes: TVLIST requires the use of the non-standard system variable !TEXTOUT. This can be added to one's session using the astronomy library procedure ASTROLIB. To display astronomical coordinates with CURVAL, one must have a FITS header with astrometry information. The astrometry can be either the CRPIX, CDELT CROTA keywords used by AIPS, IRAS etc. or the CRPIX,CD keywords used in Space Telescope data. Several procedures from the ASTROM directory are used. Users probably want to tailor TVLASER to choose their preferred FITS keywords for supplying annotation Bill Thompson has written an additional set of image display routines that are not part of the standard IDL astronomy library but which are available in the solar IDL Library at http://sohowww.nascom.nasa.gov/solarsoft/gen/idl/image/. See the aaareadme.txt file in that directory for more info. The version of SIGRANGE in this directory differs slightly from that found in the solar Library, in that it does not use the non-standard !MISSING system variable.