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include <imhdr.h>
include <mwset.h>
# IC_SETOUT -- Set output image size and offsets of input images.
procedure ic_setout (in, out, offsets, nimages)
pointer in[nimages] # Input images
pointer out[ARB] # Output images
int offsets[nimages,ARB] # Offsets
int nimages # Number of images
int i, j, indim, outdim, mwdim, a, b, amin, bmax, fd
real val
bool reloff, streq()
pointer sp, fname, lref, wref, cd, coord, shift, axno, axval
pointer mw, ct, mw_openim(), mw_sctran()
int open(), fscan(), nscan(), mw_stati()
errchk mw_openim, mw_gwtermd, mw_gltermd, mw_gaxmap
errchk mw_sctran, mw_ctrand, open
include "icombine.com"
define newscan_ 10
begin
call smark (sp)
call salloc (fname, SZ_FNAME, TY_CHAR)
call salloc (lref, IM_MAXDIM, TY_DOUBLE)
call salloc (wref, IM_MAXDIM, TY_DOUBLE)
call salloc (cd, IM_MAXDIM*IM_MAXDIM, TY_DOUBLE)
call salloc (coord, IM_MAXDIM, TY_DOUBLE)
call salloc (shift, IM_MAXDIM, TY_REAL)
call salloc (axno, IM_MAXDIM, TY_INT)
call salloc (axval, IM_MAXDIM, TY_INT)
# Check and set the image dimensionality.
indim = IM_NDIM(in[1])
outdim = IM_NDIM(out[1])
if (project) {
outdim = indim - 1
IM_NDIM(out[1]) = outdim
} else {
do i = 1, nimages
if (IM_NDIM(in[i]) != outdim) {
call sfree (sp)
call error (1, "Image dimensions are not the same")
}
}
# Set the reference point to that of the first image.
mw = mw_openim (in[1])
mwdim = mw_stati (mw, MW_NPHYSDIM)
call mw_gwtermd (mw, Memd[lref], Memd[wref], Memd[cd], mwdim)
ct = mw_sctran (mw, "world", "logical", 0)
call mw_ctrand (ct, Memd[wref], Memd[lref], mwdim)
call mw_ctfree (ct)
if (project)
Memd[lref+outdim] = 1
# Parse the user offset string. If "none" then there are no offsets.
# If "wcs" then set the offsets based on the image WCS.
# If "grid" then set the offsets based on the input grid parameters.
# If a file scan it.
call clgstr ("offsets", Memc[fname], SZ_FNAME)
call sscan (Memc[fname])
call gargwrd (Memc[fname], SZ_FNAME)
if (nscan() == 0 || streq (Memc[fname], "none")) {
call aclri (offsets, outdim*nimages)
reloff = true
} else if (streq (Memc[fname], "wcs")) {
do j = 1, outdim
offsets[1,j] = 0
if (project) {
ct = mw_sctran (mw, "world", "logical", 0)
do i = 2, nimages {
Memd[wref+outdim] = i
call mw_ctrand (ct, Memd[wref], Memd[coord], indim)
do j = 1, outdim
offsets[i,j] = nint (Memd[lref+j-1] - Memd[coord+j-1])
}
call mw_ctfree (ct)
call mw_close (mw)
} else {
do i = 2, nimages {
call mw_close (mw)
mw = mw_openim (in[i])
ct = mw_sctran (mw, "world", "logical", 0)
call mw_ctrand (ct, Memd[wref], Memd[coord], indim)
do j = 1, outdim
offsets[i,j] = nint (Memd[lref+j-1] - Memd[coord+j-1])
call mw_ctfree (ct)
}
}
reloff = true
} else if (streq (Memc[fname], "grid")) {
amin = 1
do j = 1, outdim {
call gargi (a)
call gargi (b)
if (nscan() < 1+2*j)
break
do i = 1, nimages
offsets[i,j] = mod ((i-1)/amin, a) * b
amin = amin * a
}
reloff = true
} else {
reloff = true
fd = open (Memc[fname], READ_ONLY, TEXT_FILE)
do i = 1, nimages {
newscan_ if (fscan (fd) == EOF)
call error (1, "IMCOMBINE: Offset list too short")
call gargwrd (Memc[fname], SZ_FNAME)
if (Memc[fname] == '#') {
call gargwrd (Memc[fname], SZ_FNAME)
call strlwr (Memc[fname])
if (streq (Memc[fname], "absolute"))
reloff = false
else if (streq (Memc[fname], "relative"))
reloff = true
goto newscan_
}
call reset_scan ()
do j = 1, outdim {
call gargr (val)
offsets[i,j] = nint (val)
}
if (nscan() < outdim)
call error (1, "IMCOMBINE: Error in offset list")
}
call close (fd)
}
# Set the output image size and the aligned flag
aligned = true
do j = 1, outdim {
a = offsets[1,j]
b = IM_LEN(in[1],j) + a
amin = a
bmax = b
do i = 2, nimages {
a = offsets[i,j]
b = IM_LEN(in[i],j) + a
if (a != amin || b != bmax || !reloff)
aligned = false
amin = min (a, amin)
bmax = max (b, bmax)
}
IM_LEN(out[1],j) = bmax
if (reloff || amin < 0) {
do i = 1, nimages
offsets[i,j] = offsets[i,j] - amin
IM_LEN(out[1],j) = IM_LEN(out[1],j) - amin
}
}
# Update the WCS.
if (project || !aligned || !reloff) {
call mw_close (mw)
mw = mw_openim (out[1])
mwdim = mw_stati (mw, MW_NPHYSDIM)
call mw_gaxmap (mw, Memi[axno], Memi[axval], mwdim)
if (!aligned || !reloff) {
call mw_gltermd (mw, Memd[cd], Memd[lref], mwdim)
do i = 1, mwdim {
j = Memi[axno+i-1]
if (j > 0 && j <= indim)
Memd[lref+i-1] = Memd[lref+i-1] + offsets[1,j]
}
call mw_sltermd (mw, Memd[cd], Memd[lref], mwdim)
}
if (project) {
# Apply dimensional reduction.
do i = 1, mwdim {
j = Memi[axno+i-1]
if (j <= outdim)
next
else if (j > outdim+1)
Memi[axno+i-1] = j - 1
else {
Memi[axno+i-1] = 0
Memi[axval+i-1] = 0
}
}
call mw_saxmap (mw, Memi[axno], Memi[axval], mwdim)
}
call mw_saveim (mw, out)
}
call mw_close (mw)
call sfree (sp)
end
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