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include <imhdr.h>
include "iralign.h"
# IR_M2MATCH -- Compute the intensity matching parameters.
procedure ir_m2match (ir, im, ranges, ic1, ic2, il1, il2, deltax, deltay,
deltai)
pointer ir # pointer to the ir structure
pointer im # pointer to the input image
int ranges[ARB] # ranges of data to align
int ic1[ARB] # array of input begin columns
int ic2[ARB] # array of input end columns
int il1[ARB] # array of input begin lines
int il2[ARB] # array of input end lines
real deltax[ARB] # array of x shifts
real deltay[ARB] # array of y shifts
real deltai[ARB] # array of i shifts
begin
# Initialize the intensity subraster.
call ir_vecinit (deltai, IR_NXSUB(ir) * IR_NYSUB(ir), ranges)
if (ranges[1] == NULL)
return
# Match the intensities in the direction of observation.
call ir_omatch (ir, im, ic1, ic2, il1, il2, deltax, deltay, deltai)
# Match the intensities in the other direction.
call ir_nmatch (ir, im, ic1, ic2, il1, il2, deltax, deltay, deltai)
end
# IR_OMATCH -- Procedure to match images in the direction of observation
# direction.
procedure ir_omatch (ir, im, ic1, ic2, il1, il2, deltax, deltay, deltai)
pointer ir # pointer to the ir structure
pointer im # pointer to the input image
int ic1[ARB] # beginning column limits
int ic2[ARB] # ending column limits
int il1[ARB] # beginning line limits
int il2[ARB] # ending line limits
real deltax[ARB] # array of x shifts
real deltay[ARB] # array of y shifts
real deltai[ARB] # array of intensity shifts
int num, nimages, nrasters
int pc1, pc2, pl1, pl2, c1, c2, l1, l2
int pideltax, pideltay, ideltax, ideltay
int oc1, oc2, ol1, ol2, clim1, clim2, llim1, llim2
pointer buf
real pmedian, median, dif
int ir_overlap()
pointer imgs2r()
real amedr()
begin
# Compute the do loop parameters.
nimages = IR_NXSUB(ir) * IR_NYSUB(ir)
if (IR_ORDER(ir) == IR_ROW)
nrasters = IR_NXSUB(ir)
else
nrasters = IR_NYSUB(ir)
# Loop over the subrasters to be matched.
for (num = 1; num <= nimages; num = num + 1) {
if (mod (num, nrasters) == 1) {
# Get the position and shift for the first subraster in
# the column.
pideltax = nint (deltax[num])
pideltay = nint (deltay[num])
pc1 = ic1[num]
pc2 = ic2[num]
pl1 = il1[num]
pl2 = il2[num]
num = num + 1
dif = 0.0
# Get the the position and shift for the next subraster in
# the column.to be
ideltax = nint (deltax[num])
ideltay = nint (deltay[num])
c1 = ic1[num]
c2 = ic2[num]
l1 = il1[num]
l2 = il2[num]
} else {
# Reset the coordinates of the previous subraster.
pc1 = c1
pc2 = c2
pl1 = l1
pl2 = l2
pideltax = ideltax
pideltay = ideltay
# Get the positions and shifts of the next subraster.
ideltax = nint (deltax[num])
ideltay = nint (deltay[num])
c1 = ic1[num]
c2 = ic2[num]
l1 = il1[num]
l2 = il2[num]
}
# Compute the overlap region.
if (ir_overlap (pc1 + pideltax, pc2 + pideltax, pl1 + pideltay,
pl2 + pideltay, c1 + ideltax, c2 + ideltax, l1 + ideltay,
l2 + ideltay, oc1, oc2, ol1, ol2) == YES) {
clim1 = max (pc1, min (oc1 - pideltax, pc2))
clim2 = min (pc2, max (oc2 - pideltax, pc1))
llim1 = max (pl1, min (ol1 - pideltay, pl2))
llim2 = min (pl2, max (ol2 - pideltay, pl1))
buf = imgs2r (im, clim1, clim2, llim1, llim2)
pmedian = amedr (Memr[buf], (clim2 - clim1 + 1) * (llim2 -
llim1 + 1))
clim1 = max (c1, min (oc1 - ideltax, c2))
clim2 = min (c2, max (oc2 - ideltax, c1))
llim1 = max (l1, min (ol1 - ideltay, l2))
llim2 = min (l2, max (ol2 - ideltay, l1))
buf = imgs2r (im, clim1, clim2, llim1, llim2)
median = amedr (Memr[buf], (clim2 - clim1 + 1) * (llim2 -
llim1 + 1))
dif = dif + median - pmedian
if (! IS_INDEFR (deltai[num]))
deltai[num] = deltai[num] - dif
}
}
end
# IR_NMATCH -- Procedure to match images in the other direction.
procedure ir_nmatch (ir, im, ic1, ic2, il1, il2, deltax, deltay, deltai)
pointer ir # pointer to the ir structure
pointer im # pointer to the input image
int ic1[ARB] # array of beginning columns
int ic2[ARB] # array of ending columns
int il1[ARB] # array of beginning lines
int il2[ARB] # array of ending lines
real deltax[ARB] # array of x shifts
real deltay[ARB] # array of y shifts
real deltai[ARB] # array of intensity shifts
int num, nrasters, fac, nimages, count
int pc1, pc2, pl1, pl2, c1, c2, l1, l2
int pideltax, pideltay, ideltax, ideltay
int oc1, oc2, ol1, ol2, clim1, clim2, llim1, llim2
pointer buf
real pmedian, median, pdif, dif, tdif
int ir_overlap()
pointer imgs2r()
real amedr()
begin
# Compute the do loop parameters.
nimages = IR_NXSUB(ir) * IR_NYSUB(ir)
if (IR_ORDER(ir) == IR_ROW)
nrasters = IR_NXSUB(ir)
else
nrasters = IR_NYSUB(ir)
fac = 2 * nrasters
# Loop over the subrasters to be matched.
num = 1
count = 1
repeat {
# Get the position and shift for the first subraster.
if (num <= nrasters) {
pideltax = nint (deltax[num])
pideltay = nint (deltay[num])
pc1 = ic1[num]
pc2 = ic2[num]
pl1 = il1[num]
pl2 = il2[num]
if (IS_INDEFR(deltai[num]))
pdif = 0.0
else
pdif = deltai[num]
tdif = 0.0
if (IR_RASTER(ir) == YES) {
num = fac - num + 1
fac = fac + fac
} else
num = num + nrasters
# Get the the position and shift for the next.
ideltax = nint (deltax[num])
ideltay = nint (deltay[num])
c1 = ic1[num]
c2 = ic2[num]
l1 = il1[num]
l2 = il2[num]
if (IS_INDEFR(deltai[num]))
dif = 0.0
else
dif = deltai[num]
} else {
# Reset the coordinates of the previous subraster.
pc1 = c1
pc2 = c2
pl1 = l1
pl2 = l2
pideltax = ideltax
pideltay = ideltay
pdif = dif
# Get the positions and shifts of the subraster to be adjusted.
ideltax = nint (deltax[num])
ideltay = nint (deltay[num])
c1 = ic1[num]
c2 = ic2[num]
l1 = il1[num]
l2 = il2[num]
if (IS_INDEFR(deltai[num]))
dif = 0.0
else
dif = deltai[num]
}
# Compute the overlap region.
if (ir_overlap (pc1 + pideltax, pc2 + pideltax, pl1 + pideltay,
pl2 + pideltay, c1 + ideltax, c2 + ideltax, l1 + ideltay,
l2 + ideltay, oc1, oc2, ol1, ol2) == YES) {
clim1 = max (pc1, oc1 - pideltax)
clim2 = min (pc2, oc2 - pideltax)
llim1 = max (pl1, ol1 - pideltay)
llim2 = min (pl2, ol2 - pideltay)
buf = imgs2r (im, clim1, clim2, llim1, llim2)
pmedian = amedr (Memr[buf], (clim2 - clim1 + 1) * (llim2 -
llim1 + 1))
clim1 = max (c1, oc1 - ideltax)
clim2 = min (c2, oc2 - ideltax)
llim1 = max (l1, ol1 - ideltay)
llim2 = min (l2, ol2 - ideltay)
buf = imgs2r (im, clim1, clim2, llim1, llim2)
median = amedr (Memr[buf], (clim2 - clim1 + 1) * (llim2 -
llim1 + 1))
tdif = tdif + median + dif - pmedian - pdif
if (! IS_INDEFR (deltai[num]))
deltai[num] = deltai[num] - tdif
}
if (IR_RASTER(ir) == YES) {
num = fac - num + 1
fac = fac + fac
} else
num = num + nrasters
if (num > nimages) {
count = count + 1
num = count
fac = 2 * nrasters
}
} until (count > nrasters)
end
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