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#*** File rvsao/Util/getimage.x
#*** August 11, 2010
#*** By Doug Mink
# GETIMAGE -- Opens IRAF images for gettemp and getspec and returns the
# image file descriptors and extracted header information.
# Adapted from the onedspec package in IRAF.
include <imhdr.h>
include <smw.h>
define LEN_USER_AREA 100000
procedure getimage (image,mext,mspec,band,pix,im,sh,npix,name,mode,world,debug)
char image[ARB] # Spectrum image file name
int mext # FITS image extension
int mspec # Number of spectrum to read from multispec or 2-D file
int band # Multispec band
pointer pix # Spectrum [returned]
pointer im # Image header structure [returned]
pointer sh # Spectrum header structure [returned]
int npix # Number of pixels in spectrum [returned]
char name[ARB] # Name of object [returned]
int mode # Mode (READ_ONLY, READ_WRITE)
int world # wavelength or pixel
bool debug
double ra, dec, w0, wpc
pointer mw, smw_openim()
int nline, ap, ndim
int nband # Band number for 3-D images
int ip, nc, ncat, nfib, i
int npix2, npix3
int ltitle
int ibeam
char temp[32]
# char units[32]
char apstring[80]
char impath[SZ_PATHNAME]
char imname[SZ_PATHNAME]
char tname[SZ_PATHNAME]
char rastr[32]
char decstr[32]
int imaccf(), imaccess()
int ctoi(), ctowrd()
int strlen(), strldxs(), strncmp()
pointer immap()
errchk immap()
begin
im = NULL
pix = NULL
sh = NULL
call strcpy (image, impath, SZ_PATHNAME)
# if (mext < 1) {
# call strcpy (image, imname, SZ_PATHNAME)
# call pargstr (image)
# }
# else {
call sprintf (imname, SZ_PATHNAME, "%s[%d]")
call pargstr (image)
call pargi (mext)
# }
if (debug) {
call printf ("GETIMAGE: image file %s about to be read\n")
call pargstr (imname)
call flush (STDOUT)
}
if (imaccess (impath, mode) == NO) {
if (imaccess (impath, READ_ONLY) == NO) {
if (debug) {
call printf ("GETIMAGE: image file %s cannot be read\n")
call pargstr (imname)
call flush (STDOUT)
}
im = ERR
return
}
else {
call eprintf ("GETIMAGE: Cannot write to image %s\n")
call pargstr (image)
}
}
# Map the image
iferr (im = immap (imname, mode, LEN_USER_AREA)) {
if (im != NULL) call imunmap (im)
if (debug) {
call printf ("GETIMAGE: image file %s cannot be opened\n")
call pargstr (imname)
call flush (STDOUT)
}
if (mext == 0) {
iferr (im = immap (image, mode, LEN_USER_AREA)) {
if (mode == READ_ONLY)
call eprintf ("GETIMAGE: Cannot read image %s\n")
else
call eprintf ("GETIMAGE: Cannot write to image %s\n")
call pargstr (image)
im = ERR
return
}
}
else {
if (mode == READ_ONLY)
call eprintf ("GETIMAGE: Cannot read image %s\n")
else
call eprintf ("GETIMAGE: Cannot write to image %s\n")
call pargstr (image)
im = ERR
return
}
}
ndim = IM_NDIM(im)
if (debug) {
call printf ("GETIMAGE: %d x %d x %d %d-D image: spectrum %d\n")
call pargi (IM_LEN(im,1))
call pargi (IM_LEN(im,2))
call pargi (IM_LEN(im,3))
call pargi (ndim)
call pargi (mspec)
call flush (STDOUT)
}
if (ndim > 1) {
npix2 = IM_LEN(im,2)
npix3 = IM_LEN(im,3)
if (ndim > 2 && npix3 > 1) {
if (band > npix3) {
call eprintf ("GETIMAGE: Band %d > %d in image %s\n")
call pargi (band)
call pargi (npix3)
call pargstr (image)
call imunmap (im)
im = ERR
return
}
else if (mspec > npix2) {
call eprintf ("GETIMAGE: Ap %d > %d(3) in image %s\n")
call pargi (mspec)
call pargi (npix2)
call pargstr (image)
call imunmap (im)
im = ERR
return
}
else {
nline = mspec
nband = band
}
}
else if (ndim == 2 && mspec > npix2) {
call eprintf ("GETIMAGE: Ap %d > %d(2) in image %s\n")
call pargi (mspec)
call pargi (npix2)
call pargstr (image)
call imunmap (im)
im = ERR
return
}
else {
nband = 1
if (mspec > 0)
nline = mspec
else
nline = 1
}
}
else {
nline = 1
nband = 1
# Set up FITS World Coordinate System keywords if not present in 1-D spectrum
if (imaccf (im, "W0") == YES && imaccf (im, "CRVAL1") == NO) {
call imgdpar (im, "W0",w0)
call imaddi (im,"CRPIX1",1)
call imaddd (im,"CRVAL1",w0)
}
if (imaccf (im, "WPC") == YES && imaccf (im, "CDELT1") == NO) {
call imgdpar (im, "WPC",wpc)
call imaddd (im,"CDELT1",wpc)
}
}
# If stacked spectra and CD2_2 is not set, set it to 1
if (ndim > 1) {
if (imaccf (im, "CD2_2") == NO) {
call imaddd (im, "CD2_2", 1.d0)
}
}
# If working in pixel space, set WCS accordingly
# if (world == 2) {
# call strcpy ("angstroms", units, 32)
# call imgspar (im, "CRUNIT1", units, 32)
# if (strncmp (units, "pixel", 5) != 0) {
# call imaddi (im, "DC-FLAG", 0)
# call imaddi (im, "CRPIX1", 1)
# call imaddd (im, "CRVAL1", 1.d0)
# call imaddd (im, "CDELT1", 1.d0)
# call imaddd (im, "CD1_1", 1.d0)
# if (ndim > 1) {
# call imaddi (im, "CRPIX2", 1)
# call imaddd (im, "CRVAL2", 1.d0)
# call imaddd (im, "CDELT2", 1.d0)
# call imaddd (im, "CD2_2", 1.d0)
# }
# }
# }
ap = INDEFI
# Set dispersion axis for 1-D spectra
if (ndim < 3 && imaccf (im, "DISPAXIS") == NO) {
if (ndim < 2) {
call imaddi (im,"DISPAXIS",1)
if (debug) {
call eprintf ("GETIMAGE: Dispersion axis set to 1 in image %s\n")
call pargstr (image)
}
}
else {
if (IM_LEN(im,1) == 1) {
call imaddi (im,"DISPAXIS",2)
if (debug) {
call eprintf ("GETIMAGE: Dispersion axis set to 2 in image %s\n")
call pargstr (image)
}
}
else if (IM_LEN(im,2) == 1) {
call imaddi (im,"DISPAXIS",1)
if (debug) {
call eprintf ("GETIMAGE: Dispersion axis set to 1 in image %s\n")
call pargstr (image)
}
}
else {
call imaddi (im,"DISPAXIS",1)
if (debug) {
call eprintf ("GETIMAGE: No dispersion axis in %d-dim image %s, 1 assumed\n")
call pargi (ndim)
call pargstr (image)
}
}
}
}
# Open spectrum world coordinate system
if (debug) {
call printf ("GETIMAGE: Ready to open MWCS\n")
call flush (STDOUT)
}
mw = smw_openim (im)
call smw_daxis (mw, im, 0, INDEFI, INDEFI)
call smw_saxes (mw, NULL, im)
if (mw == ERR) {
call eprintf ("GETIMAGE: MWCS error in image %s\n")
call pargstr (image)
call imunmap (im)
im = ERR
return
}
# Set position variables to 0:00 if missing
if (debug) {
call printf ("GETIMAGE: Checking positions in header\n")
call flush (STDOUT)
}
temp[0] = EOS
call imgspar (im, "RA", temp, 32)
if (strlen (temp) < 1) {
call imastr (im, "RA","00:00:00.000")
if (debug) {
call imgspar (im, "RA", temp, 32)
call printf ("GETIMAGE: RA set to %s\n")
call pargstr (temp)
call flush (STDOUT)
}
}
temp[0] = EOS
call imgspar (im, "DEC", temp, 32)
if (strlen (temp) < 1) {
call imastr (im, "DEC","00:00:00.00")
if (debug) {
call imgspar (im, "DEC", temp, 32)
call printf ("GETIMAGE: DEC set to %s\n")
call pargstr (temp)
call flush (STDOUT)
}
}
temp[0] = EOS
call imgspar (im, "HA", temp, 32)
if (strlen (temp) < 1) {
call imastr (im, "HA","00:00:00.000")
if (debug) {
call imgspar (im, "HA", temp, 32)
call printf ("GETIMAGE: HA set to %s\n")
call pargstr (temp)
call flush (STDOUT)
}
}
temp[0] = EOS
call imgspar (im, "ST", temp, 32)
if (strlen (temp) < 1) {
call imastr (im, "ST","00:00:00.000")
if (debug) {
call imgspar (im, "ST", temp, 32)
call printf ("GETIMAGE: ST set to %s\n")
call pargstr (temp)
call flush (STDOUT)
}
}
# Open spectrum header
if (debug) {
call printf ("GETIMAGE: Ready to open SH\n")
call flush (STDOUT)
}
call shdr_open (im, mw, nline, nband, ap, SHDATA, sh)
if (sh == ERR) {
call eprintf ("GETIMAGE: Spectrum header error in image %s\n")
call pargstr (image)
call imunmap (im)
im = ERR
return
}
if (world < 2 && (strncmp (LABEL(sh),"Pix",3) == 0 ||
strncmp (LABEL(sh),"pix",3) == 0)) {
if (debug) {
call eprintf ("GETIMAGE: Non-spectral dispersion %s in image %s\n")
call pargstr (LABEL(sh))
call pargstr (image)
}
# call imunmap (im)
# im = ERR
# return
}
npix = IM_LEN (im, 1)
# Get image line to plot
if (debug) call printf ("GETIMAGE: Ready to get image line\n")
pix = SY(sh)
w0 = W0(sh)
wpc = WP(sh)
if (w0 <= 1.d0) {
call imgipar (im,"DC-FLAG ",DC(sh))
call imgdpar (im, "W0",w0)
call imgdpar (im, "WPC",wpc)
if (DC(sh) == 1) {
W0(sh) = 10.d0 ** w0
WP(sh) = 10.d0 ** wpc
W1(sh) = 10.d0 ** (w0 + (wpc * (npix - 1)))
}
else {
W0(sh) = w0
WP(sh) = wpc
W1(sh) = w0 + (wpc * (npix - 1))
}
CTWL(sh) = NULL
}
if (debug) {
call printf ("GETIMAGE: line = %d, aperture = %d %d\n")
call pargi (nline)
call pargi (AP(sh))
call pargi (ap)
}
# Title is object name (and spectrum number if multispec)
call strcpy (TITLE(sh), name, SZ_PATHNAME)
ltitle = strlen (name)
if (ltitle < 1) {
call strcpy (IM_TITLE(im), name, SZ_PATHNAME)
ltitle = strlen (name)
}
if (ltitle < 1) {
ip = strldxs ("$/",image)
if (ip > 0)
call strcpy (image[ip+1],name,SZ_PATHNAME)
else
call strcpy (image, name, SZ_PATHNAME)
}
if (mspec > 0) {
call sprintf (temp, 32, "_%d")
call pargi (mspec)
call strcat (temp, name, SZ_PATHNAME)
}
# If APIDi keyword is present, read position information from it
call sprintf (temp, 32, "APID%d")
call pargi (mspec)
if (imaccf (im, temp) == YES) {
call imgspar (im, temp, apstring, 80)
do i = 1, 80 {
if (apstring[i] != ' ')
tname[i] = apstring[i]
else {
tname[i] = EOS
ip = i + 1
break
}
}
nc = ctowrd (apstring, ip, rastr, 31)
if (nc > 0)
call imastr (im, "RA",rastr)
nc = ctowrd (apstring, ip, decstr, 31)
if (nc > 0)
call imastr (im, "DEC",decstr)
nc = ctoi (apstring, ip, ncat)
ncat = -10
if (nc > 0)
call imaddi (im, "CATNUM", ncat)
nc = ctoi (apstring, ip, nfib)
if (nc > 0)
call imaddi (im, "FIBER", nfib)
ibeam = -10
if (ncat == 0) {
ibeam = 2
call strcpy (tname, name, SZ_PATHNAME)
}
else if (ncat < 0) {
ibeam = 0
call strcpy (tname, name, SZ_PATHNAME)
}
else {
ibeam = 1
if (debug) {
call printf ("GETIMAGE: field name is \"%s\", object name is \"%s\"\n")
call pargstr (IM_TITLE(im))
call pargstr (tname)
}
if (strncmp (tname, "target", 6) == 0) {
call sprintf (name, SZ_PATHNAME, "%s_%d")
call pargstr (IM_TITLE(im))
call pargi (ncat)
}
else
call strcpy (tname, name, SZ_PATHNAME)
}
if (debug) {
call printf ("GETIMAGE: ap %d: fiber=%d beam= %d ra=%h dec=%h name=%s\n")
call pargi (mspec)
call pargi (nfib)
call pargi (ibeam)
call pargd (ra)
call pargd (dec)
call pargstr (name)
}
if (ncat > -10)
call imaddi (im, "BEAM", ibeam)
}
# Use telescope pointing direction RA and DEC if RA keyword not there
if (imaccf (im, "RA") == NO) {
if (imaccf (im, "POSTN-RA") == YES) {
call imgdpar (im, "POSTN-RA",ra)
ra = ra / 15.d0
call imaddd (im, "RA",ra)
call imgdpar (im, "POSTN-DEC",dec)
call imaddd (im, "DEC",dec)
}
}
end
# Feb 14 1992 Rewrite to read any multispec file, not just echelle
# Read velocities from strings in multispec files
# Feb 18 1992 Read RA and Dec from telescope direction in multifiber files
# Apr 22 1992 Get mspec as input argument
# May 22 1992 Do not change mspec
# Aug 11 1992 Set number of emission lines fit correctly
# Jan 22 1993 Check APNUM* only if mspec > 0
# May 25 1993 Move all velocity information out of subroutine
# May 28 1993 Set up MWCS pixel<->wavelength transformations
# Jun 4 1993 Use shdr subroutine from onedspec package to open mwcs
# Jun 16 1993 Fix shdr subroutine use
# Jul 7 1993 Add spectrum header to getimage arguments
# Jul 12 1993 Turn off debugging
# Aug 11 1993 Reset mspec if it exceeds limit found in shdr_open
# Aug 24 1993 Fix error checking
# Dec 2 1993 Increase user area length from 2880 to 100000
# Dec 3 1993 Add spectrum number to spectrum name
# Mar 23 1994 Use filename as object name if no object name is present
# Apr 8 1994 Add FITS WCS info if not present in 1-D spectrum
# Apr 12 1994 Handle 3-D multispec files correctly
# Apr 12 1994 Return mwcs structure
# Apr 13 1994 Drop unused variable naxes; fix shdr close argument list
# May 3 1994 Do not free pix
# May 23 1994 Improve image open error message
# Jun 15 1994 Add flag for xc filtering; drop log lambda flag from common
# Jun 23 1994 Keep mwcs pointer in shdr
# Jan 19 1995 Return error if spectrum header error occurs
# Mar 29 1995 Return error if dispaxis not set in multispec image
# May 15 1995 Change all sz_fname to sz_pathname, which is longer
# Jun 6 1995 Set dispersion axis for 1 or 2 dimensions
# Jun 14 1995 Assume dispersion axis is 1 if none is set
# Jun 19 1995 Print aperture number if different that multispec sequence
# Jun 19 1995 Get spectrum name from spectrum header OR image title
# Jun 19 1995 Add aperture number to name in SHDR_OPEN, not here
# Oct 6 1995 Call SPHD_OPEN instead of SHDR_OPEN
# Jul 8 1996 Pass debugging flag in to this subroutine
# Aug 7 1996 Use smw.h; add smw_openim
# Aug 15 1996 Add smw_daxis to set summing to one
# Apr 9 1997 Return error if aperture not 0 or within image dimension
# Apr 9 1997 Return error if dispersion units are pixels
# Aug 27 1997 Add argument for multispec band
# Apr 22 1998 Drop getim.com
# Aug 2 2000 Add spectrum number to name of spectrum
# Sep 26 2000 Add world argument for wavelength, pixel
# Sep 7 2001 Fix units comparison
# Sep 19 2001 Test for pixel units correctly
# Aug 1 2003 Add argument for image extension number
# Oct 20 2003 Pass spectrum even if no dispersion
# Jan 16 2004 Print nonspectral dispersion message only in debug mode
# Dec 8 2005 Do not add aperture/band to image name if 0
# Jun 1 2006 Read position, name, and beam from APID if present
# Apr 6 2007 If no name for spectrum, make file_ap, not file [ap]
# Jun 13 2007 If APIDi doesn't contain complete info, do not overwrite header
# Jun 14 2007 Read RA and Dec as strings from APIDi
# Mar 10 2008 Ignore world argument; resetting header confuses shdr_open()
# Jul 2 2008 Check for file existence using imaccess(), not access()
# Apr 10 2009 If no pointing direction is present, set it to 0:00 0:00
# Oct 7 2009 Make all file names length SZ_PATHNAME instead of SZ_FNAME
# Jul 16 2010 If stacked spectra and CD2_2 is not set, set it to 1
# Aug 11 2010 Always add extension number to name
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