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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include <imset.h>
include <error.h>
include "icombine.h"
# IC_SCALE -- Get the scale factors for the images.
# 1. This procedure does CLIO to determine the type of scaling desired.
# 2. The output header parameters for exposure time and NCOMBINE are set.
procedure ic_scale (in, out, offsets, scales, zeros, wts, nimages)
pointer in[nimages] # Input images
pointer out[ARB] # Output images
int offsets[nimages,ARB] # Image offsets
real scales[nimages] # Scale factors
real zeros[nimages] # Zero or sky levels
real wts[nimages] # Weights
int nimages # Number of images
int stype, ztype, wtype
int i, j, k, l, nout
real mode, median, mean, exposure, zmean, darktime, dark
pointer sp, ncombine, exptime, modes, medians, means
pointer section, str, sname, zname, wname, imref
bool domode, domedian, domean, dozero, snorm, znorm, wflag
bool clgetb()
int hdmgeti(), strdic(), ic_gscale()
real hdmgetr(), asumr(), asumi()
errchk ic_gscale, ic_statr
include "icombine.com"
begin
call smark (sp)
call salloc (ncombine, nimages, TY_INT)
call salloc (exptime, nimages, TY_REAL)
call salloc (modes, nimages, TY_REAL)
call salloc (medians, nimages, TY_REAL)
call salloc (means, nimages, TY_REAL)
call salloc (section, SZ_FNAME, TY_CHAR)
call salloc (str, SZ_LINE, TY_CHAR)
call salloc (sname, SZ_FNAME, TY_CHAR)
call salloc (zname, SZ_FNAME, TY_CHAR)
call salloc (wname, SZ_FNAME, TY_CHAR)
# Set the defaults.
call amovki (1, Memi[ncombine], nimages)
call amovkr (0., Memr[exptime], nimages)
call amovkr (INDEF, Memr[modes], nimages)
call amovkr (INDEF, Memr[medians], nimages)
call amovkr (INDEF, Memr[means], nimages)
call amovkr (1., scales, nimages)
call amovkr (0., zeros, nimages)
call amovkr (1., wts, nimages)
# Get the number of images previously combined and the exposure times.
# The default combine number is 1 and the default exposure is 0.
do i = 1, nimages {
iferr (Memi[ncombine+i-1] = hdmgeti (in[i], "ncombine"))
Memi[ncombine+i-1] = 1
iferr (Memr[exptime+i-1] = hdmgetr (in[i], "exptime"))
Memr[exptime+i-1] = 0.
if (project) {
call amovki (Memi[ncombine], Memi[ncombine], nimages)
call amovkr (Memr[exptime], Memr[exptime], nimages)
break
}
}
# Set scaling factors.
stype = ic_gscale ("scale", Memc[sname], STYPES, in, Memr[exptime],
scales, nimages)
ztype = ic_gscale ("zero", Memc[zname], ZTYPES, in, Memr[exptime],
zeros, nimages)
wtype = ic_gscale ("weight", Memc[wname], WTYPES, in, Memr[exptime],
wts, nimages)
# Get image statistics only if needed.
domode = ((stype==S_MODE)||(ztype==S_MODE)||(wtype==S_MODE))
domedian = ((stype==S_MEDIAN)||(ztype==S_MEDIAN)||(wtype==S_MEDIAN))
domean = ((stype==S_MEAN)||(ztype==S_MEAN)||(wtype==S_MEAN))
if (domode || domedian || domean) {
Memc[section] = EOS
Memc[str] = EOS
call clgstr ("statsec", Memc[section], SZ_FNAME)
call sscan (Memc[section])
call gargwrd (Memc[section], SZ_FNAME)
call gargwrd (Memc[str], SZ_LINE)
i = strdic (Memc[section], Memc[section], SZ_FNAME, S_SECTION)
switch (i) {
case S_INPUT:
call strcpy (Memc[str], Memc[section], SZ_FNAME)
imref = NULL
case S_OUTPUT:
call strcpy (Memc[str], Memc[section], SZ_FNAME)
imref = out[1]
case S_OVERLAP:
call strcpy ("[", Memc[section], SZ_FNAME)
do i = 1, IM_NDIM(out[1]) {
k = offsets[1,i] + 1
l = offsets[1,i] + IM_LEN(in[1],i)
do j = 2, nimages {
k = max (k, offsets[j,i]+1)
l = min (l, offsets[j,i]+IM_LEN(in[j],i))
}
if (i < IM_NDIM(out[1]))
call sprintf (Memc[str], SZ_LINE, "%d:%d,")
else
call sprintf (Memc[str], SZ_LINE, "%d:%d]")
call pargi (k)
call pargi (l)
call strcat (Memc[str], Memc[section], SZ_FNAME)
}
imref = out[1]
default:
imref = NULL
}
do i = 1, nimages {
if (imref != out[1])
imref = in[i]
call ic_statr (in[i], imref, Memc[section], offsets,
i, nimages, domode, domedian, domean, mode, median, mean)
if (domode) {
Memr[modes+i-1] = mode
if (stype == S_MODE)
scales[i] = mode
if (ztype == S_MODE)
zeros[i] = mode
if (wtype == S_MODE)
wts[i] = mode
}
if (domedian) {
Memr[medians+i-1] = median
if (stype == S_MEDIAN)
scales[i] = median
if (ztype == S_MEDIAN)
zeros[i] = median
if (wtype == S_MEDIAN)
wts[i] = median
}
if (domean) {
Memr[means+i-1] = mean
if (stype == S_MEAN)
scales[i] = mean
if (ztype == S_MEAN)
zeros[i] = mean
if (wtype == S_MEAN)
wts[i] = mean
}
}
}
do i = 1, nimages
if (scales[i] <= 0.) {
call eprintf ("WARNING: Negative scale factors")
call eprintf (" -- ignoring scaling\n")
call amovkr (1., scales, nimages)
break
}
# Convert to relative factors if needed.
snorm = (stype == S_FILE || stype == S_KEYWORD)
znorm = (ztype == S_FILE || ztype == S_KEYWORD)
wflag = (wtype == S_FILE || wtype == S_KEYWORD)
if (snorm)
call arcpr (1., scales, scales, nimages)
else {
mean = asumr (scales, nimages) / nimages
call adivkr (scales, mean, scales, nimages)
}
call adivr (zeros, scales, zeros, nimages)
zmean = asumr (zeros, nimages) / nimages
if (wtype != S_NONE) {
do i = 1, nimages {
if (wts[i] <= 0.) {
call eprintf ("WARNING: Negative weights")
call eprintf (" -- using only NCOMBINE weights\n")
do j = 1, nimages
wts[j] = Memi[ncombine+j-1]
break
}
if (ztype == S_NONE || znorm || wflag)
wts[i] = Memi[ncombine+i-1] * wts[i]
else {
if (zeros[i] <= 0.) {
call eprintf ("WARNING: Negative zero offsets")
call eprintf (" -- ignoring zero weight adjustments\n")
do j = 1, nimages
wts[j] = Memi[ncombine+j-1] * wts[j]
break
}
wts[i] = Memi[ncombine+i-1] * wts[i] * zmean / zeros[i]
}
}
}
if (znorm)
call anegr (zeros, zeros, nimages)
else {
# Because of finite arithmetic it is possible for the zero offsets
# to be nonzero even when they are all equal. Just for the sake of
# a nice log set the zero offsets in this case.
call asubkr (zeros, zmean, zeros, nimages)
for (i=2; (i<=nimages)&&(zeros[i]==zeros[1]); i=i+1)
;
if (i > nimages)
call aclrr (zeros, nimages)
}
mean = asumr (wts, nimages)
call adivkr (wts, mean, wts, nimages)
# Set flags for scaling, zero offsets, sigma scaling, weights.
# Sigma scaling may be suppressed if the scales or zeros are
# different by a specified tolerance.
doscale = false
dozero = false
doscale1 = false
dowts = false
do i = 2, nimages {
if (snorm || scales[i] != scales[1])
doscale = true
if (znorm || zeros[i] != zeros[1])
dozero = true
if (wts[i] != wts[1])
dowts = true
}
if (doscale && sigscale != 0.) {
do i = 1, nimages {
if (abs (scales[i] - 1) > sigscale) {
doscale1 = true
break
}
}
if (!doscale1 && zmean > 0.) {
do i = 1, nimages {
if (abs (zeros[i] / zmean) > sigscale) {
doscale1 = true
break
}
}
}
}
# Set the output header parameters.
nout = asumi (Memi[ncombine], nimages)
call hdmputi (out[1], "ncombine", nout)
exposure = 0.
darktime = 0.
mean = 0.
do i = 1, nimages {
exposure = exposure + wts[i] * Memr[exptime+i-1] / scales[i]
ifnoerr (dark = hdmgetr (in[i], "darktime"))
darktime = darktime + wts[i] * dark / scales[i]
else
darktime = darktime + wts[i] * Memr[exptime+i-1] / scales[i]
ifnoerr (mode = hdmgetr (in[i], "ccdmean"))
mean = mean + wts[i] * mode / scales[i]
}
call hdmputr (out[1], "exptime", exposure)
call hdmputr (out[1], "darktime", darktime)
ifnoerr (mode = hdmgetr (out[1], "ccdmean")) {
call hdmputr (out[1], "ccdmean", mean)
iferr (call imdelf (out[1], "ccdmeant"))
;
}
if (out[2] != NULL) {
call imstats (out[2], IM_IMAGENAME, Memc[str], SZ_FNAME)
call imastr (out[1], "BPM", Memc[str])
}
# Start the log here since much of the info is only available here.
if (clgetb ("verbose")) {
i = logfd
logfd = STDOUT
call ic_log (in, out, Memi[ncombine], Memr[exptime], Memc[sname],
Memc[zname], Memc[wname], Memr[modes], Memr[medians],
Memr[means], scales, zeros, wts, offsets, nimages, dozero,
nout, "", exposure)
logfd = i
}
call ic_log (in, out, Memi[ncombine], Memr[exptime], Memc[sname],
Memc[zname], Memc[wname], Memr[modes], Memr[medians], Memr[means],
scales, zeros, wts, offsets, nimages, dozero, nout,
"", exposure)
doscale = (doscale || dozero)
call sfree (sp)
end
# IC_GSCALE -- Get scale values as directed by CL parameter
# The values can be one of those in the dictionary, from a file specified
# with a @ prefix, or from an image header keyword specified by a ! prefix.
int procedure ic_gscale (param, name, dic, in, exptime, values, nimages)
char param[ARB] #I CL parameter name
char name[SZ_FNAME] #O Parameter value
char dic[ARB] #I Dictionary string
pointer in[nimages] #I IMIO pointers
real exptime[nimages] #I Exposure times
real values[nimages] #O Values
int nimages #I Number of images
int type #O Type of value
int fd, i, nowhite(), open(), fscan(), nscan(), strdic()
real rval, hdmgetr()
pointer errstr
errchk open, hdmgetr()
include "icombine.com"
begin
call clgstr (param, name, SZ_FNAME)
if (nowhite (name, name, SZ_FNAME) == 0)
type = S_NONE
else if (name[1] == '@') {
type = S_FILE
fd = open (name[2], READ_ONLY, TEXT_FILE)
i = 0
while (fscan (fd) != EOF) {
call gargr (rval)
if (nscan() != 1)
next
if (i == nimages) {
call eprintf (
"Warning: Ignoring additional %s values in %s\n")
call pargstr (param)
call pargstr (name[2])
break
}
i = i + 1
values[i] = rval
}
call close (fd)
if (i < nimages) {
call salloc (errstr, SZ_LINE, TY_CHAR)
call sprintf (Memc[errstr], SZ_FNAME,
"Insufficient %s values in %s")
call pargstr (param)
call pargstr (name[2])
call error (1, Memc[errstr])
}
} else if (name[1] == '!') {
type = S_KEYWORD
do i = 1, nimages {
values[i] = hdmgetr (in[i], name[2])
if (project) {
call amovkr (values, values, nimages)
break
}
}
} else {
type = strdic (name, name, SZ_FNAME, dic)
if (type == 0)
call error (1, "Unknown scale, zero, or weight type")
if (type==S_EXPOSURE)
do i = 1, nimages
values[i] = max (0.001, exptime[i])
}
return (type)
end
|
