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|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include <imset.h>
include "icombine.h"
# IC_SCALE -- Get and set the scaling factors.
#
# If the scaling parameters have been set earlier then this routine
# just normalizes the factors and writes the log output.
# When dealing with individual images using image statistics for scaling
# factors this routine determines the image statistics rather than being
# done earlier since the input images have all been mapped at this stage.
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, sumwts
pointer sp, ncombine, exptime, modes, medians, means
pointer section, str, sname, zname, wname, im, imref
bool domode, domedian, domean, dozero, dos, doz, dow, snorm, znorm, wflag
int imgeti(), strdic(), ic_gscale()
real imgetr(), asumr(), asumi()
pointer xt_opix()
errchk ic_gscale, xt_opix, 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_LINE, 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)
# 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] = imgeti (in[i], "ncombine"))
Memi[ncombine+i-1] = 1
if (Memc[expkeyword] != EOS) {
iferr (Memr[exptime+i-1] = imgetr (in[i], Memc[expkeyword]))
Memr[exptime+i-1] = 0.
} else
Memr[exptime+i-1] = 0.
if (project) {
call amovki (Memi[ncombine], Memi[ncombine], nimages)
call amovkr (Memr[exptime], Memr[exptime], nimages)
break
}
}
# Set scaling type and 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 if needed.
dos = ((stype==S_MODE)||(stype==S_MEDIAN)||(stype==S_MEAN))
doz = ((ztype==S_MODE)||(ztype==S_MEDIAN)||(ztype==S_MEAN))
dow = ((wtype==S_MODE)||(wtype==S_MEDIAN)||(wtype==S_MEAN))
if (dos) {
dos = false
do i = 1, nimages
if (IS_INDEFR(scales[i])) {
dos = true
break
}
}
if (doz) {
doz = false
do i = 1, nimages
if (IS_INDEFR(zeros[i])) {
doz = true
break
}
}
if (dow) {
dow = false
do i = 1, nimages
if (IS_INDEFR(wts[i])) {
dow = true
break
}
}
if (dos || doz || dow) {
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))
Memc[section] = EOS
Memc[str] = EOS
call sscan (Memc[statsec])
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 {
im = xt_opix (in[i], i, 0)
if (imref != out[1])
imref = im
if ((dos && IS_INDEFR(scales[i])) ||
(doz && IS_INDEFR(zeros[i])) ||
(dow && IS_INDEFR(wts[i]))) {
call ic_statr (im, imref, Memc[section], offsets, i,
nimages, domode, domedian, domean, mode, median, mean)
if (domode) {
if (stype == S_MODE && IS_INDEFR(scales[i]))
scales[i] = mode
if (ztype == S_MODE && IS_INDEFR(zeros[i]))
zeros[i] = mode
if (wtype == S_MODE && IS_INDEFR(wts[i]))
wts[i] = mode
}
if (domedian) {
if (stype == S_MEDIAN && IS_INDEFR(scales[i]))
scales[i] = median
if (ztype == S_MEDIAN && IS_INDEFR(zeros[i]))
zeros[i] = median
if (wtype == S_MEDIAN && IS_INDEFR(wts[i]))
wts[i] = median
}
if (domean) {
if (stype == S_MEAN && IS_INDEFR(scales[i]))
scales[i] = mean
if (ztype == S_MEAN && IS_INDEFR(zeros[i]))
zeros[i] = mean
if (wtype == S_MEAN && IS_INDEFR(wts[i]))
wts[i] = mean
}
}
}
}
# Save the image statistics if computed.
call amovkr (INDEFR, Memr[modes], nimages)
call amovkr (INDEFR, Memr[medians], nimages)
call amovkr (INDEFR, Memr[means], nimages)
if (stype == S_MODE)
call amovr (scales, Memr[modes], nimages)
if (stype == S_MEDIAN)
call amovr (scales, Memr[medians], nimages)
if (stype == S_MEAN)
call amovr (scales, Memr[means], nimages)
if (ztype == S_MODE)
call amovr (zeros, Memr[modes], nimages)
if (ztype == S_MEDIAN)
call amovr (zeros, Memr[medians], nimages)
if (ztype == S_MEAN)
call amovr (zeros, Memr[means], nimages)
if (wtype == S_MODE)
call amovr (wts, Memr[modes], nimages)
if (wtype == S_MEDIAN)
call amovr (wts, Memr[medians], nimages)
if (wtype == S_MEAN)
call amovr (wts, Memr[means], nimages)
# If nothing else has set the scaling factors set them to defaults.
do i = 1, nimages {
if (IS_INDEFR(scales[i]))
scales[i] = 1.
if (IS_INDEFR(zeros[i]))
zeros[i] = 0.
if (IS_INDEFR(wts[i]))
wts[i] = 1.
}
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 factors relative to the first image.
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)
mean = scales[1]
call adivkr (scales, mean, scales, nimages)
call adivr (zeros, scales, zeros, 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] * zeros[1] / 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.
mean = zeros[1]
call asubkr (zeros, mean, 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)
if (mean > 0.)
call adivkr (wts, mean, wts, nimages)
else {
call eprintf ("WARNING: Mean weight is zero -- using no weights\n")
call amovkr (1., wts, nimages)
mean = 1.
}
# 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
}
}
}
# Set the output header parameters.
nout = asumi (Memi[ncombine], nimages)
call imaddi (out[1], "ncombine", nout)
mean = 0.
sumwts = 0.
do i = 1, nimages {
ifnoerr (mode = imgetr (in[i], "ccdmean")) {
mean = mean + wts[i] * mode / scales[i]
sumwts = sumwts + wts[i]
}
}
if (sumwts > 0.) {
mean = mean / sumwts
ifnoerr (mode = imgetr (out[1], "ccdmean")) {
call imaddr (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 (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)
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)
doscale = (doscale || dozero)
call sfree (sp)
end
|
