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include <imhdr.h>
include <math/gsurfit.h>
include "psfmatch.h"
# RG_PSFM -- Procedure to match the psf functions of two images.
int procedure rg_psfm (pm, imr, im1, impsf, imk, newref)
pointer pm #I pointer to psf matching structure
pointer imr #I pointer to reference image
pointer im1 #I pointer to input image
pointer impsf #I pointer to the psf image
pointer imk #I pointer to kernel image
int newref #I new reference image ?
int stat
int rg_pstati(), rg_pfget(), rg_psfget(), rg_kget()
pointer rg_pstatp()
begin
# Compute the convolution kernel.
if (rg_pstati (pm, CONVOLUTION) != PM_CONKERNEL) {
# Compute the kernel using raw image data or the psf image.
if (rg_pstati (pm,CONVOLUTION) == PM_CONIMAGE) {
# Set the kernel size to the user specified kernel size.
call rg_pseti (pm, KNX, rg_pstati (pm, PNX))
if (IM_NDIM(imr) == 1)
call rg_pseti (pm, KNY, 1)
else
call rg_pseti (pm, KNY, rg_pstati (pm, PNY))
# Compute the FFTS of the input and reference image.
stat = rg_pfget (pm, imr, im1, newref)
} else {
# Set the kernel size to the psf image size
call rg_pseti (pm, KNX, IM_LEN (impsf,1))
if (IM_NDIM(imr) == 1)
call rg_pseti (pm, KNY, 1)
else
call rg_pseti (pm, KNY, IM_LEN(impsf,2))
# Compute the FFTS of the input and reference psf images.
stat = rg_psfget (pm, imr, impsf, newref)
}
# Delete working arrays if an error occurs.
if (stat == ERR) {
if (rg_pstatp (pm, REFFFT) != NULL)
call mfree (rg_pstatp (pm, REFFFT), TY_REAL)
call rg_psetp (pm, REFFFT, NULL)
if (rg_pstatp (pm, IMFFT) != NULL)
call mfree (rg_pstatp (pm, IMFFT), TY_REAL)
call rg_psetp (pm, IMFFT, NULL)
if (rg_pstatp (pm, FFT) != NULL)
call mfree (rg_pstatp (pm, FFT), TY_REAL)
call rg_psetp (pm, FFT, NULL)
if (rg_pstatp (pm, CONV) != NULL)
call mfree (rg_pstatp (pm, CONV), TY_REAL)
call rg_psetp (pm, CONV, NULL)
if (rg_pstatp (pm, ASFFT) != NULL)
call mfree (rg_pstatp (pm, ASFFT), TY_REAL)
call rg_psetp (pm, ASFFT, NULL)
}
# Do the filtering in frequency space.
if (rg_pstatp (pm, FFT) != NULL)
call rg_pfilter (pm)
} else {
# Set the kernel size.
call rg_pseti (pm, KNX, IM_LEN(imk,1))
if (IM_NDIM(im1) == 1)
call rg_pseti (pm, KNY, 1)
else
call rg_pseti (pm, KNY, IM_LEN(imk,2))
# Read in the convolution kernel.
stat = rg_kget (pm, imk)
# Delete working arrays if an error occurs.
if (stat == ERR) {
if (rg_pstatp (pm, REFFFT) != NULL)
call mfree (rg_pstatp (pm, REFFFT), TY_REAL)
call rg_psetp (pm, REFFFT, NULL)
if (rg_pstatp (pm, IMFFT) != NULL)
call mfree (rg_pstatp (pm, IMFFT), TY_REAL)
call rg_psetp (pm, IMFFT, NULL)
if (rg_pstatp (pm, FFT) != NULL)
call mfree (rg_pstatp (pm, FFT), TY_REAL)
call rg_psetp (pm, FFT, NULL)
if (rg_pstatp (pm, CONV) != NULL)
call mfree (rg_pstatp (pm, CONV), TY_REAL)
call rg_psetp (pm, CONV, NULL)
if (rg_pstatp (pm, ASFFT) != NULL)
call mfree (rg_pstatp (pm, ASFFT), TY_REAL)
call rg_psetp (pm, ASFFT, NULL)
}
}
return (stat)
end
# RG_PFGET -- Compute the psfmatching function using Fourier techniques.
int procedure rg_pfget (pm, imr, im1, newref)
pointer pm #I pointer to psfmatch structure
pointer imr #I pointer to reference image
pointer im1 #I pointer to input image
int newref #I new reference image ?
int i, nregions, nrimcols, nrimlines, nrcols, nrlines, nrpcols, nrplines
int nborder, stat, rc1, rc2, rl1, rl2, nxfft, nyfft
pointer sp, str, coeff, dim, rbuf, ibuf, rsum, isum, border
pointer prc1, prc2, prl1, prl2, przero, prxslope, pryslope, reffft, imfft, fft
real rwtsum, iwtsum, rscale, iscale, rnscale, inscale
bool fp_equalr()
int rg_pstati(), rg_border(), rg_szfft()
pointer rg_pstatp(), rg_pgdata()
real rg_pstatr(), rg_pnsum(), rg_pg1norm(), rg_pg2norm()
real rg_pg10f(), rg_pg20f()
define nextimage_ 11
begin
# Assemble the PSF data by looping over the regions list.
nregions = rg_pstati (pm, NREGIONS)
if (nregions <= 0)
return (ERR)
call smark (sp)
call salloc (str, SZ_LINE, TY_CHAR)
call salloc (coeff, max (GS_SAVECOEFF+6, 9), TY_REAL)
call salloc (dim, 2, TY_INT)
# Get the reference region pointers.
prc1 = rg_pstatp (pm, RC1)
prc2 = rg_pstatp (pm, RC2)
prl1 = rg_pstatp (pm, RL1)
prl2 = rg_pstatp (pm, RL2)
przero = rg_pstatp (pm, RZERO)
prxslope = rg_pstatp (pm, RXSLOPE)
pryslope = rg_pstatp (pm, RYSLOPE)
# Check to see if the reference / input images are 1D.
nrimcols = IM_LEN(imr,1)
nrpcols = rg_pstati (pm, PNX)
if (IM_NDIM(imr) == 1) {
nrimlines = 1
nrplines = 1
} else {
nrimlines = IM_LEN(imr,2)
nrplines = rg_pstati (pm, PNY)
}
# Initialize
rwtsum = 0.0
iwtsum = 0.0
rnscale = INDEFR
inscale = INDEFR
rbuf = NULL
ibuf = NULL
stat = OK
if (newref == YES)
call calloc (rsum, rg_pstati (pm, DNX) * rg_pstati (pm, DNY),
TY_REAL)
call calloc (isum, rg_pstati (pm, DNX) * rg_pstati (pm, DNY),
TY_REAL)
do i = 1, nregions {
# Get the reference subraster regions.
rc1 = max (1, min (nrimcols, Memi[prc1+i-1]))
rc2 = min (nrimcols, max (1, Memi[prc2+i-1]))
rl1 = max (1, min (nrimlines, Memi[prl1+i-1]))
rl2 = min (nrimlines, max (1, Memi[prl2+i-1]))
nrcols = rc2 - rc1 + 1
nrlines = rl2 - rl1 + 1
# Go to next object if reference region is off the image.
if (nrcols < rg_pstati (pm, DNX) || (IM_NDIM(imr) == 2 &&
nrlines < rg_pstati(pm, DNY))) {
call rg_pstats (pm, REFIMAGE, Memc[str], SZ_LINE)
call eprintf (
"Reference object %d: %s[%d:%d,%d:%d] is off image.\n")
call pargi (i)
call pargstr (Memc[str])
call pargi (rc1)
call pargi (rc2)
call pargi (rl1)
call pargi (rl2)
next
}
if (newref == YES) {
# Get the reference data.
rbuf = rg_pgdata (imr, rc1, rc2, rl1, rl2)
# Do the reference image background subtraction.
border = NULL
nborder = rg_border (Memr[rbuf], nrcols, nrlines, nrpcols,
nrplines, border)
call rg_pscale (pm, Memr[border], nborder, nrcols,
nrlines, nrpcols, nrplines, rg_pstatr (pm, BVALUER),
Memr[coeff])
if (border != NULL)
call mfree (border, TY_REAL)
# Save the coefficients.
Memr[przero+i-1] = Memr[coeff]
Memr[prxslope+i-1] = Memr[coeff+1]
Memr[pryslope+i-1] = Memr[coeff+2]
# Subtract the reference background.
call rg_subtract (Memr[rbuf], nrcols, nrlines,
Memr[przero+i-1], Memr[prxslope+i-1], Memr[pryslope+i-1])
# Apodize the reference image data.
if (rg_pstatr (pm, APODIZE) > 0.0)
call rg_apodize (Memr[rbuf], nrcols, nrlines,
rg_pstatr (pm, APODIZE), YES)
# Compute the scale factors and accumulate the weighted sums.
rscale = rg_pnsum (Memr[rbuf], nrcols, nrlines, nrpcols,
nrplines)
if (! IS_INDEFR(rscale)) {
if (IS_INDEFR(rnscale))
rnscale = 1.0 / rscale
}
if (IS_INDEFR(rscale))
rscale = 1.0
else
rscale = rscale / rnscale
call amulkr (Memr[rbuf], rscale, Memr[rbuf], nrcols *
nrlines)
rwtsum = rwtsum + rscale
call aaddr (Memr[rsum], Memr[rbuf], Memr[rsum], nrcols *
nrlines)
call mfree (rbuf, TY_REAL)
}
# Get the input image data
ibuf = rg_pgdata (im1, rc1, rc2, rl1, rl2)
# Compute the zero point, and the x and y slopes of input image.
border = NULL
nborder = rg_border (Memr[ibuf], nrcols, nrlines, nrpcols,
nrplines, border)
call rg_pscale (pm, Memr[border], nborder, nrcols, nrlines,
nrpcols, nrplines, rg_pstatr (pm, BVALUE), Memr[coeff])
if (border != NULL)
call mfree (border, TY_REAL)
# Subtract the background from the input image.
call rg_subtract (Memr[ibuf], nrcols, nrlines, Memr[coeff],
Memr[coeff+1], Memr[coeff+2])
# Apodize the data.
if (rg_pstatr (pm, APODIZE) > 0.0)
call rg_apodize (Memr[ibuf], nrcols, nrlines, rg_pstatr (pm,
APODIZE), YES)
# Compute the scale factors and accumulate the weighted sums for
# input image.
iscale = rg_pnsum (Memr[ibuf], nrcols, nrlines, nrpcols, nrplines)
if (! IS_INDEFR(iscale)) {
if (IS_INDEFR(inscale))
inscale = 1.0 / iscale
}
if (IS_INDEFR(iscale))
iscale = 1.0
else
iscale = iscale / inscale
call amulkr (Memr[ibuf], iscale, Memr[ibuf], nrcols * nrlines)
iwtsum = iwtsum + iscale
call aaddr (Memr[isum], Memr[ibuf], Memr[isum], nrcols * nrlines)
# Free the individual image buffers.
call mfree (ibuf, TY_REAL)
}
# Check to see if any data was read.
if (iwtsum <= 0.0) {
stat = ERR
goto nextimage_
}
# Normalize the summed buffers by the weights.
if (newref == YES) {
if (! fp_equalr (rwtsum, 0.0))
call adivkr (Memr[rsum], rwtsum, Memr[rsum], nrcols * nrlines)
}
if (! fp_equalr (iwtsum, 0.0))
call adivkr (Memr[isum], iwtsum, Memr[isum], nrcols * nrlines)
# Figure out how big the Fourier transform has to be, given
# the size of the reference subraster, the window size and
# the fact that the FFT must be a power of 2.
nxfft = rg_szfft (nrcols, 0)
if (nrlines == 1)
nyfft = 1
else
nyfft = rg_szfft (nrlines, 0)
call rg_pseti (pm, NXFFT, nxfft)
call rg_pseti (pm, NYFFT, nyfft)
imfft = rg_pstatp (pm, IMFFT)
if (imfft != NULL)
call mfree (imfft, TY_REAL)
call calloc (imfft, 2 * nxfft * nyfft, TY_REAL)
call rg_psetp (pm, IMFFT, imfft)
# Allocate space for the fft.
fft = rg_pstatp (pm, FFT)
if (fft != NULL)
call mfree (fft, TY_REAL)
call calloc (fft, 2 * nxfft * nyfft, TY_REAL)
call rg_psetp (pm, FFT, fft)
# Allocate space for the reference and input image ffts
if (newref == YES) {
reffft = rg_pstatp (pm, REFFFT)
if (reffft != NULL)
call mfree (reffft, TY_REAL)
call calloc (reffft, 2 * nxfft * nyfft, TY_REAL)
call rg_psetp (pm, REFFFT, reffft)
# Load the reference image FFT.
call rg_rload (Memr[rsum], nrcols, nrlines, Memr[fft], nxfft,
nyfft)
call mfree (rsum, TY_REAL)
rsum = NULL
# Load the input image FFT.
call rg_iload (Memr[isum], nrcols, nrlines, Memr[fft], nxfft,
nyfft)
call mfree (isum, TY_REAL)
isum = NULL
# Shift the data for easy of filtering.
call rg_fshift (Memr[fft], Memr[fft], 2 * nxfft, nyfft)
# Compute the Fourier Transform of the reference and input image
# data.
Memi[dim] = nxfft
Memi[dim+1] = nyfft
if (Memi[dim+1] == 1)
call rg_fourn (Memr[fft], Memi[dim], 1, 1)
else
call rg_fourn (Memr[fft], Memi[dim], 2, 1)
# Compute the flux ratio between the two data sets.
if (IS_INDEFR(rg_pstatr(pm, UFLUXRATIO))) {
if (rg_pstati (pm, BACKGRD) == PM_BNONE)
call rg_psetr (pm, FLUXRATIO, rg_pg2norm (Memr[fft],
2 * nxfft, nyfft))
else
call rg_psetr (pm, FLUXRATIO, rg_pg20f (Memr[fft],
2 * nxfft, nyfft))
} else
call rg_psetr (pm, FLUXRATIO, rg_pstatr (pm, UFLUXRATIO))
# Separate the two transforms and compute the division.
call rg_pdivfft (Memr[fft], Memr[reffft], Memr[imfft], Memr[fft],
2 * nxfft, nyfft)
} else {
# Get the reference image FFT.
reffft = rg_pstatp (pm, REFFFT)
# Load the input image FFT.
call rg_rload (Memr[isum], nrcols, nrlines, Memr[imfft], nxfft,
nyfft)
call mfree (isum, TY_REAL)
isum = NULL
# Shift the data for easy of filtering.
call rg_fshift (Memr[imfft], Memr[imfft], 2 * nxfft, nyfft)
# Compute the Fourier Transform of the input image data.
Memi[dim] = nxfft
Memi[dim+1] = nyfft
if (Memi[dim+1] == 1)
call rg_fourn (Memr[imfft], Memi[dim], 1, 1)
else
call rg_fourn (Memr[imfft], Memi[dim], 2, 1)
# Compute the flux ratio between the two data sets.
if (IS_INDEFR(rg_pstatr(pm, UFLUXRATIO))) {
if (rg_pstati (pm, BACKGRD) == PM_BNONE)
call rg_psetr (pm, FLUXRATIO, rg_pg1norm (Memr[reffft],
2 * nxfft, nyfft) / rg_pg1norm (Memr[imfft], 2 * nxfft,
nyfft))
else
call rg_psetr (pm, FLUXRATIO, rg_pg10f (Memr[reffft],
2 * nxfft, nyfft) / rg_pg10f (Memr[imfft], 2 * nxfft,
nyfft))
} else
call rg_psetr (pm, FLUXRATIO, rg_pstatr (pm, UFLUXRATIO))
# Divide the two functions.
call adivx (Memr[reffft], Memr[imfft], Memr[fft], nxfft * nyfft)
}
# Normalize the FFT.
call rg_pnorm (Memr[fft], nxfft, nyfft, rg_pstatr (pm, FLUXRATIO))
nextimage_
if (rsum != NULL)
call mfree (rsum, TY_REAL)
if (isum != NULL)
call mfree (isum, TY_REAL)
call sfree (sp)
if (stat == ERR)
return (ERR)
else
return (OK)
end
# RG_PSFGET -- Compute the psfmatching function using Fourier techniques.
int procedure rg_psfget (pm, imr, impsf, newref)
pointer pm #I pointer to the psfmatch structure
pointer imr #I pointer to the reference psf
pointer impsf #I pointer to the input image psf
int newref #I new reference image
int nrcols, nrlines, nxfft, nyfft
pointer sp, dim, rbuf, ibuf, imfft, fft, reffft
int rg_szfft()
pointer rg_pgdata(), rg_pstatp()
real rg_pstatr(), rg_pg2norm(), rg_pg1norm()
begin
call smark (sp)
call salloc (dim, 2, TY_INT)
nrcols = IM_LEN(imr,1)
if (IM_NDIM(imr) == 1)
nrlines = 1
else
nrlines = IM_LEN(imr,2)
# Get the psf data.
rbuf = NULL
ibuf = NULL
if (newref == YES) {
call calloc (rbuf, nrcols * nrlines, TY_REAL)
rbuf = rg_pgdata (imr, 1, nrcols, 1, nrlines)
}
call calloc (ibuf, nrcols * nrlines, TY_REAL)
ibuf = rg_pgdata (impsf, 1, nrcols, 1, nrlines)
# Compute the size for the FFT buffers.
nxfft = rg_szfft (nrcols, 0)
if (nrlines == 1)
nyfft = 1
else
nyfft = rg_szfft (nrlines, 0)
call rg_pseti (pm, NXFFT, nxfft)
call rg_pseti (pm, NYFFT, nyfft)
imfft = rg_pstatp (pm, IMFFT)
if (imfft != NULL)
call mfree (imfft, TY_REAL)
call calloc (imfft, 2 * nxfft * nyfft, TY_REAL)
call rg_psetp (pm, IMFFT, imfft)
# Allocate space for the fft.
fft = rg_pstatp (pm, FFT)
if (fft != NULL)
call mfree (fft, TY_REAL)
call calloc (fft, 2 * nxfft * nyfft, TY_REAL)
call rg_psetp (pm, FFT, fft)
if (newref == YES) {
reffft = rg_pstatp (pm, REFFFT)
if (reffft != NULL)
call mfree (reffft, TY_REAL)
call calloc (reffft, 2 * nxfft * nyfft, TY_REAL)
call rg_psetp (pm, REFFFT, reffft)
# Load the reference image FFT.
call rg_rload (Memr[rbuf], nrcols, nrlines, Memr[fft], nxfft,
nyfft)
# Load the input image FFT.
call rg_iload (Memr[ibuf], nrcols, nrlines, Memr[fft], nxfft,
nyfft)
# Shift the data for easy of filtering.
call rg_fshift (Memr[fft], Memr[fft], 2 * nxfft, nyfft)
# Compute the Fourier Transform of the reference and input image
# data.
Memi[dim] = nxfft
Memi[dim+1] = nyfft
if (Memi[dim+1] == 1)
call rg_fourn (Memr[fft], Memi[dim], 1, 1)
else
call rg_fourn (Memr[fft], Memi[dim], 2, 1)
# Compute the flux ratio between the two data sets.
if (IS_INDEFR(rg_pstatr(pm, UFLUXRATIO)))
call rg_psetr (pm, FLUXRATIO, rg_pg2norm (Memr[fft],
2 * nxfft, nyfft))
else
call rg_psetr (pm, FLUXRATIO, rg_pstatr(pm, UFLUXRATIO))
# Separate the two transforms and compute the division.
call rg_pdivfft (Memr[fft], Memr[reffft], Memr[imfft], Memr[fft],
2 * nxfft, nyfft)
} else {
# Get the reference image FFT.
reffft = rg_pstatp (pm, REFFFT)
# Load the input image FFT.
call rg_rload (Memr[ibuf], nrcols, nrlines, Memr[imfft], nxfft,
nyfft)
# Shift the data for easy of filtering.
call rg_fshift (Memr[imfft], Memr[imfft], 2 * nxfft, nyfft)
# Compute the Fourier Transform of the input image data.
Memi[dim] = nxfft
Memi[dim+1] = nyfft
if (Memi[dim+1] == 1)
call rg_fourn (Memr[imfft], Memi[dim], 1, 1)
else
call rg_fourn (Memr[imfft], Memi[dim], 2, 1)
# Compute the flux ratio between the two data sets.
if (IS_INDEFR(rg_pstatr(pm, UFLUXRATIO)))
call rg_psetr (pm, FLUXRATIO, rg_pg1norm (Memr[reffft],
2 * nxfft, nyfft) / rg_pg1norm (Memr[imfft], 2 * nxfft,
nyfft))
else
call rg_psetr (pm, FLUXRATIO, rg_pstatr(pm, UFLUXRATIO))
# Divide the two functions.
call adivx (Memr[reffft], Memr[imfft], Memr[fft], nxfft * nyfft)
}
# Normalize the FFT.
call rg_pnorm (Memr[fft], nxfft, nyfft, rg_pstatr (pm, FLUXRATIO))
# Free the data buffers.
if (rbuf != NULL)
call mfree (rbuf, TY_REAL)
if (ibuf != NULL)
call mfree (ibuf, TY_REAL)
call sfree (sp)
return (OK)
end
# RG_KGET -- Read in the convolution kernel.
int procedure rg_kget (pm, imk)
pointer pm #I pointer to the psfmatch structure
pointer imk #I pointer to the kernel image
int nrlines
pointer conv
pointer rg_pstatp(), rg_pgdata()
begin
if (IM_NDIM(imk) == 1)
nrlines = 1
else
nrlines = IM_LEN(imk,2)
conv = rg_pstatp (pm, CONV)
if (conv != NULL)
call mfree (conv, TY_REAL)
conv = rg_pgdata (imk, 1, int(IM_LEN(imk,1)), 1, nrlines)
call rg_psetp (pm, CONV, conv)
return (OK)
end
# RG_PFILTER -- Procedure to filter the FFT in frequency space.
procedure rg_pfilter (pm)
pointer pm #I pointer to the psf matching structure
pointer sp, dim, psfft, conv
real nfactor
int rg_pstati()
pointer rg_pstatp()
real rg_pstatr(), asumr()
begin
call smark (sp)
call salloc (dim, 2, TY_INT)
# Allocate space for the fourier spectrum.
if (rg_pstatp (pm, ASFFT) != NULL)
call mfree (rg_pstatp (pm, ASFFT), TY_REAL)
call calloc (psfft, rg_pstati (pm, NXFFT) * rg_pstati (pm, NYFFT),
TY_REAL)
call rg_psetp (pm, ASFFT, psfft)
# Allocate space for the convolution kernel.
if (rg_pstatp (pm, CONV) != NULL)
call mfree (rg_pstatp (pm, CONV), TY_REAL)
call malloc (conv, 2 * rg_pstati (pm, NXFFT) * rg_pstati (pm, NYFFT),
TY_REAL)
call rg_psetp (pm, CONV, conv)
call amovr (Memr[rg_pstatp(pm,FFT)], Memr[rg_pstatp(pm,CONV)],
2 * rg_pstati (pm, NXFFT) * rg_pstati (pm, NYFFT))
# # Compute the zextend parameter.
# call rg_psetr (pm, THRESHOLD, rg_pstatr (pm, PRATIO) *
# rg_gnorm (Memr[rg_pstatp(pm,IMFFT)], rg_pstati(pm,NXFFT),
# rg_pstati(pm,NYFFT)))
# Filter the frequency spectrum.
switch (rg_pstati(pm,FILTER)) {
case PM_FCOSBELL:
call rg_pcosbell (Memr[rg_pstatp(pm,CONV)], rg_pstati (pm, NXFFT),
rg_pstati (pm, NYFFT), rg_pstatr (pm, SXINNER), rg_pstatr (pm,
SXOUTER), rg_pstatr (pm, SYINNER), rg_pstatr (pm, SYOUTER),
rg_pstati (pm, RADSYM))
case PM_FREPLACE:
call rg_preplace (Memr[rg_pstatp(pm,CONV)], Memr[rg_pstatp(pm,
IMFFT)], rg_pstati (pm, NXFFT), rg_pstati (pm, NYFFT),
rg_pstatr (pm,THRESHOLD), rg_pstatr (pm,FLUXRATIO))
case PM_FMODEL:
call rg_pgmodel (Memr[rg_pstatp(pm,CONV)], Memr[rg_pstatp(pm,
IMFFT)], rg_pstati (pm, NXFFT), rg_pstati (pm, NYFFT),
rg_pstatr (pm, THRESHOLD), rg_pstatr (pm, FLUXRATIO))
default:
;
}
# Filter out any values greater than the normalization.
call rg_pnormfilt (Memr[rg_pstatp(pm,CONV)], rg_pstati(pm,NXFFT),
rg_pstati(pm,NYFFT), rg_pstatr (pm, FLUXRATIO))
# Compute the fourier spectrum.
call rg_pfourier (Memr[rg_pstatp(pm,CONV)], Memr[rg_pstatp(pm,ASFFT)],
rg_pstati(pm,NXFFT), rg_pstati(pm,NYFFT))
Memi[dim] = rg_pstati (pm, NXFFT)
Memi[dim+1] = rg_pstati (pm, NYFFT)
call rg_fshift (Memr[rg_pstatp(pm,CONV)], Memr[rg_pstatp(pm,CONV)],
2 * rg_pstati(pm, NXFFT), rg_pstati(pm, NYFFT))
call rg_fourn (Memr[rg_pstatp(pm,CONV)], Memi[dim], 2, -1)
call rg_fshift (Memr[rg_pstatp(pm,CONV)], Memr[rg_pstatp(pm,CONV)],
2 * rg_pstati(pm, NXFFT), rg_pstati(pm, NYFFT))
call adivkr (Memr[rg_pstatp(pm,CONV)], real (rg_pstati(pm,NXFFT) *
rg_pstati(pm,NYFFT)), Memr[rg_pstatp(pm,CONV)], 2 * rg_pstati(pm,
NXFFT) * rg_pstati(pm,NYFFT))
# Unpack the convolution kernel.
call rg_movexr (Memr[rg_pstatp(pm,CONV)], rg_pstati(pm,NXFFT),
rg_pstati(pm,NYFFT), Memr[rg_pstatp(pm,CONV)], rg_pstati(pm,KNX),
rg_pstati(pm,KNY))
# Normalize the kernel.
if (! IS_INDEFR(rg_pstatr (pm, NORMFACTOR))) {
nfactor = rg_pstatr (pm, NORMFACTOR) / asumr (Memr[rg_pstatp(pm,
CONV)], rg_pstati (pm, KNX) * rg_pstati(pm,KNY))
call amulkr (Memr[rg_pstatp (pm,CONV)], nfactor,
Memr[rg_pstatp(pm, CONV)], rg_pstati (pm, KNX) *
rg_pstati (pm, KNY))
}
# Reallocate the convolution kernel array
#conv = rg_pstatp (pm, CONV)
#if (conv != NULL) {
#call realloc (conv, rg_pstati(pm, KNX) * rg_pstati(pm, KNY),
#TY_REAL)
#call rg_psetp (pm, CONV, conv)
#}
call sfree (sp)
end
# RG_PGDATA -- Fill a buffer from a specified region of the image.
pointer procedure rg_pgdata (im, c1, c2, l1, l2)
pointer im #I pointer to the iraf image
int c1, c2 #I column limits in the input image
int l1, l2 #I line limits in the input image
int i, ncols, nlines, npts
pointer ptr, index, buf
pointer imgs1r(), imgs2r()
begin
ncols = c2 - c1 + 1
nlines = l2 - l1 + 1
npts = ncols * nlines
call malloc (ptr, npts, TY_REAL)
index = ptr
do i = l1, l2 {
if (IM_NDIM(im) == 1)
buf = imgs1r (im, c1, c2)
else
buf = imgs2r (im, c1, c2, i, i)
call amovr (Memr[buf], Memr[index], ncols)
index = index + ncols
}
return (ptr)
end
# RG_PNSUM -- Compute the total intensity in the subtracted subraster.
real procedure rg_pnsum (data, ncols, nlines, nxdata, nydata)
real data[ncols,nlines] #I the input data subraster
int ncols, nlines #I the size of the input subraster
int nxdata, nydata #I the size of the data region
int j, wxborder, wyborder, npts
real sum
bool fp_equalr()
real asumr()
begin
wxborder = (ncols - nxdata) / 2
wyborder = (nlines - nydata) / 2
sum = 0.0
npts = 0
do j = 1 + wyborder, nlines - wyborder {
sum = sum + asumr (data[1+wxborder,j], nxdata)
npts = npts + nxdata
}
if (npts <= 0 || fp_equalr (sum, 0.0))
return (INDEFR)
else
return (sum)
end
# RG_PWRITE -- Save the convolution kernel and the fourier spectrum of the
# convolution kernel in an image.
procedure rg_pwrite (pm, imk, imf)
pointer pm #I pointer to psf matching structure
pointer imk #I pointer to kernel image
pointer imf #I pointer to fourier spectrum image
int nx, ny
pointer buf
int rg_pstati()
pointer rg_pstatp(), imps2r()
begin
# Write out the kernel image.
if (imk != NULL && rg_pstatp(pm, CONV) != NULL) {
nx = rg_pstati (pm, KNX)
ny = rg_pstati (pm, KNY)
IM_NDIM(imk) = 2
IM_LEN(imk,1) = nx
IM_LEN(imk,2) = ny
IM_PIXTYPE(imk) = TY_REAL
buf = imps2r (imk, 1, nx, 1, ny)
if (rg_pstatp (pm, CONV) != NULL)
call amovr (Memr[rg_pstatp(pm,CONV)], Memr[buf], nx * ny)
else
call amovkr (0.0, Memr[buf], nx * ny)
}
# Write out the fourier spectrum.
if (imf != NULL && rg_pstatp(pm,ASFFT) != NULL) {
nx = rg_pstati (pm, NXFFT)
ny = rg_pstati (pm, NYFFT)
IM_NDIM(imf) = 2
IM_LEN(imf,1) = nx
IM_LEN(imf,2) = ny
IM_PIXTYPE(imf) = TY_REAL
buf = imps2r (imf, 1, nx, 1, ny)
if (rg_pstatp (pm, CONV) != NULL)
call amovr (Memr[rg_pstatp(pm,ASFFT)], Memr[buf], nx * ny)
else
call amovkr (0.0, Memr[buf], nx * ny)
}
end
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