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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include <mach.h>
include "../icombine.h"
$for (sird)
# IC_GDATA -- Get line of image and mask data and apply threshold and scaling.
# Entirely empty lines are excluded. The data are compacted within the
# input data buffers. If it is required, the connection to the original
# image index is kept in the returned m data pointers.
procedure ic_gdata$t (in, out, dbuf, d, id, n, m, lflag, offsets, scales,
zeros, nimages, npts, v1, v2)
pointer in[nimages] # Input images
pointer out[3] # Output images
pointer dbuf[nimages] # Data buffers
pointer d[nimages] # Data pointers
pointer id[nimages] # ID pointers
int n[npts] # Number of good pixels
pointer m[nimages] # Mask pointers
int lflag[nimages] # Empty mask flags
int offsets[nimages,ARB] # Image offsets
real scales[nimages] # Scale factors
real zeros[nimages] # Zero offset factors
int nimages # Number of input images
int npts # NUmber of output points per line
long v1[ARB], v2[ARB] # Line vectors
int i, j, k, l, ndim, nused
real a, b
pointer buf, dp, ip, mp, imgnl$t()
include "../icombine.com"
begin
# Get masks and return if there is no data
call ic_mget (in, out, offsets, v1, v2, m, lflag, nimages)
if (dflag == D_NONE) {
call aclri (n, npts)
return
}
# Get data and fill data buffers. Correct for offsets if needed.
ndim = IM_NDIM(out[1])
do i = 1, nimages {
if (lflag[i] == D_NONE)
next
if (dbuf[i] == NULL) {
call amovl (v1, v2, IM_MAXDIM)
if (project)
v2[ndim+1] = i
j = imgnl$t (in[i], d[i], v2)
} else {
v2[1] = v1[1]
do j = 2, ndim
v2[j] = v1[j] - offsets[i,j]
if (project)
v2[ndim+1] = i
j = imgnl$t (in[i], buf, v2)
call amov$t (Mem$t[buf], Mem$t[dbuf[i]+offsets[i,1]],
IM_LEN(in[i],1))
d[i] = dbuf[i]
}
}
# Apply threshold if needed
if (dothresh) {
do i = 1, nimages {
dp = d[i]
if (lflag[i] == D_ALL) {
do j = 1, npts {
a = Mem$t[dp]
if (a < lthresh || a > hthresh) {
Memi[m[i]+j-1] = 1
lflag[i] = D_MIX
dflag = D_MIX
}
dp = dp + 1
}
} else if (lflag[i] == D_MIX) {
mp = m[i]
do j = 1, npts {
if (Memi[mp] == 0) {
a = Mem$t[dp]
if (a < lthresh || a > hthresh) {
Memi[m[i]+j-1] = 1
dflag = D_MIX
}
}
dp = dp + 1
mp = mp + 1
}
}
# Check for completely empty lines
if (lflag[i] == D_MIX) {
lflag[i] = D_NONE
mp = m[i]
do j = 1, npts {
if (Memi[mp] == 0) {
lflag[i] = D_MIX
break
}
mp = mp + 1
}
}
}
}
# Apply scaling (avoiding masked pixels which might overflow?)
if (doscale) {
if (dflag == D_ALL) {
do i = 1, nimages {
dp = d[i]
a = scales[i]
b = -zeros[i]
do j = 1, npts {
Mem$t[dp] = Mem$t[dp] / a + b
dp = dp + 1
}
}
} else if (dflag == D_MIX) {
do i = 1, nimages {
dp = d[i]
a = scales[i]
b = -zeros[i]
if (lflag[i] == D_ALL) {
do j = 1, npts {
Mem$t[dp] = Mem$t[dp] / a + b
dp = dp + 1
}
} else if (lflag[i] == D_MIX) {
mp = m[i]
do j = 1, npts {
if (Memi[mp] == 0)
Mem$t[dp] = Mem$t[dp] / a + b
dp = dp + 1
mp = mp + 1
}
}
}
}
}
# Sort pointers to exclude unused images.
# Use the lflag array to keep track of the image index.
if (dflag == D_ALL)
nused = nimages
else {
nused = 0
do i = 1, nimages
if (lflag[i] != D_NONE) {
nused = nused + 1
d[nused] = d[i]
m[nused] = m[i]
lflag[nused] = i
}
if (nused == 0)
dflag = D_NONE
}
# Compact data to remove bad pixels
# Keep track of the image indices if needed
# If growing mark the end of the included image indices with zero
if (dflag == D_ALL) {
call amovki (nused, n, npts)
if (keepids)
do i = 1, nimages
call amovki (i, Memi[id[i]], npts)
} else if (dflag == D_NONE)
call aclri (n, npts)
else {
call aclri (n, npts)
if (keepids) {
do i = 1, nused {
l = lflag[i]
dp = d[i]
ip = id[i]
mp = m[i]
do j = 1, npts {
if (Memi[mp] == 0) {
n[j] = n[j] + 1
k = n[j]
if (k < i) {
Mem$t[d[k]+j-1] = Mem$t[dp]
Memi[id[k]+j-1] = l
} else
Memi[ip] = l
}
dp = dp + 1
ip = ip + 1
mp = mp + 1
}
}
if (grow >= 1.) {
do j = 1, npts {
do i = n[j]+1, nimages
Memi[id[i]+j-1] = 0
}
}
} else {
do i = 1, nused {
dp = d[i]
mp = m[i]
do j = 1, npts {
if (Memi[mp] == 0) {
n[j] = n[j] + 1
k = n[j]
if (k < i)
Mem$t[d[k]+j-1] = Mem$t[dp]
}
dp = dp + 1
mp = mp + 1
}
}
}
}
# Sort the pixels and IDs if needed
if (mclip) {
call malloc (dp, nimages, TY_PIXEL)
if (keepids) {
call malloc (ip, nimages, TY_INT)
call ic_2sort$t (d, Mem$t[dp], id, Memi[ip], n, npts)
call mfree (ip, TY_INT)
} else
call ic_sort$t (d, Mem$t[dp], n, npts)
call mfree (dp, TY_PIXEL)
}
end
$endfor
|
