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include <fset.h>
include <imhdr.h>
include "psfmatch.h"
# RG_PREGIONS -- Decoode the regions specification. If the sections
# string is NULL then a default region dnx by dny pixels wide centered
# on the reference image is used. Otherwise the section centers are
# read from the regions string or from the objects list.
int procedure rg_pregions (list, im, pm, rp, reread)
int list #I pointer to regions file list
pointer im #I pointer to the image
pointer pm #I pointer to the psfmatch structure
int rp #I region pointer
int reread #I reread the current file
char fname[SZ_FNAME]
int nregions, fd
int open(), rg_prregions(), rg_pgregions(), fntgfnb()
int rg_pstati()
data fname[1] /EOS/
errchk open(), fntgfnb(), close()
begin
if (rp < 1 || rp > MAX_NREGIONS) {
nregions = 0
} else if (rg_pgregions (im, pm, rp, MAX_NREGIONS) > 0) {
nregions = rg_pstati (pm, NREGIONS)
} else if (list != NULL) {
if (reread == NO) {
iferr {
if (fntgfnb (list, fname, SZ_FNAME) != EOF) {
fd = open (fname, READ_ONLY, TEXT_FILE)
nregions= rg_prregions (fd, im, pm, rp, MAX_NREGIONS)
call close (fd)
}
} then
nregions = 0
} else if (fname[1] != EOS) {
iferr {
fd = open (fname, READ_ONLY, TEXT_FILE)
nregions= rg_prregions (fd, im, pm, rp, MAX_NREGIONS)
call close (fd)
} then
nregions = 0
}
} else
nregions = 0
return (nregions)
end
# RG_PMKREGIONS -- Create a list of psf objects by selecting objects with
# the image display cursor.
int procedure rg_pmkregions (fd, im, pm, rp, max_nregions)
int fd #I the output coordinates file descriptor
pointer im #I pointer to the image
pointer pm #I pointer to the psf matching structure
int rp #I pointer to current region
int max_nregions #I maximum number of regions
int nregions, wcs, key, x1, x2, y1, y2
pointer sp, region, cmd
real x, y, xc, yc
int clgcur(), rg_pstati()
pointer rg_pstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (region, SZ_FNAME, TY_CHAR)
call salloc (cmd, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information,
call rg_prealloc (pm, max_nregions)
nregions = min (rp-1, rg_pstati (pm, NREGIONS))
while (nregions < max_nregions) {
# Identify the object.
call printf ("Mark object %d [any key=mark,q=quit]:\n")
call pargi (nregions + 1)
if (clgcur ("icommands", x, y, wcs, key, Memc[cmd], SZ_LINE) == EOF)
break
if (key == 'q')
break
# Center the object.
if (rg_pstati (pm, CENTER) == YES) {
call rg_pcntr (im, x, y, max (rg_pstati(pm, PNX),
rg_pstati(pm, PNY)), xc, yc)
} else {
xc = x
yc = y
}
# Compute the data section.
x1 = xc - rg_pstati (pm, DNX) / 2
x2 = x1 + rg_pstati (pm, DNX) - 1
y1 = yc - rg_pstati (pm, DNY) / 2
y2 = y1 + rg_pstati (pm, DNY) - 1
# Make sure that the region is on the image.
if (x1 < 1 || x2 > IM_LEN(im,1) || y1 < 1 || y2 >
IM_LEN(im,2))
next
if (fd != NULL) {
call fprintf (fd, "%0.3f %0.3f\n")
call pargr (xc)
call pargr (yc)
}
Memi[rg_pstatp(pm,RC1)+nregions] = x1
Memi[rg_pstatp(pm,RC2)+nregions] = x2
Memi[rg_pstatp(pm,RL1)+nregions] = y1
Memi[rg_pstatp(pm,RL2)+nregions] = y2
Memr[rg_pstatp(pm,RZERO)+nregions] = INDEFR
Memr[rg_pstatp(pm,RXSLOPE)+nregions] = INDEFR
Memr[rg_pstatp(pm,RYSLOPE)+nregions] = INDEFR
nregions = nregions + 1
}
# Reallocate the correct amount of space.
call rg_pseti (pm, NREGIONS, nregions)
if (nregions > 0) {
call rg_prealloc (pm, nregions)
if (fd != NULL) {
call fstats (fd, F_FILENAME, Memc[region], SZ_FNAME)
call rg_psets (pm, PSFDATA, Memc[region])
} else
call rg_psets (pm, PSFDATA, "")
} else {
call rg_prfree (pm)
call rg_psets (pm, PSFDATA, "")
}
call sfree (sp)
return (nregions)
end
# RG_PRREGIONS -- Procedure to read the regions from a file.
int procedure rg_prregions (fd, im, pm, rp, max_nregions)
int fd #I regions file descriptor
pointer im #I pointer to the image
pointer pm #I pointer to psf matching structure
int rp #I pointer to current region
int max_nregions #I maximum number of regions
int nregions, x1, y1, x2, y2
pointer sp, line
real x, y, xc, yc
int rg_pstati(), getline()
pointer rg_pstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (line, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information,
call rg_prealloc (pm, max_nregions)
# Decode the regions string.
nregions = min (rp - 1, rg_pstati (pm, NREGIONS))
while (getline (fd, Memc[line]) != EOF) {
if (nregions >= max_nregions)
break
call sscan (Memc[line])
call gargr (x)
call gargr (y)
if (rg_pstati (pm, CENTER) == YES) {
call rg_pcntr (im, x, y, max (rg_pstati(pm, PNX),
rg_pstati(pm, PNY)), xc, yc)
} else {
xc = x
yc = y
}
# Compute the data section.
x1 = xc - rg_pstati (pm, DNX) / 2
x2 = x1 + rg_pstati (pm, DNX) - 1
if (IM_NDIM(im) == 1) {
y1 = 1
y2 = 1
} else {
y1 = yc - rg_pstati (pm, DNY) / 2
y2 = y1 + rg_pstati (pm, DNY) - 1
}
# Make sure that the region is on the image.
if (x1 < 1 || x2 > IM_LEN(im,1) || y1 < 1 || y2 >
IM_LEN(im,2))
next
# Add the new region to the list.
Memi[rg_pstatp(pm,RC1)+nregions] = x1
Memi[rg_pstatp(pm,RC2)+nregions] = x2
Memi[rg_pstatp(pm,RL1)+nregions] = y1
Memi[rg_pstatp(pm,RL2)+nregions] = y2
Memr[rg_pstatp(pm,RZERO)+nregions] = INDEFR
Memr[rg_pstatp(pm,RXSLOPE)+nregions] = INDEFR
Memr[rg_pstatp(pm,RYSLOPE)+nregions] = INDEFR
nregions = nregions + 1
}
call rg_pseti (pm, NREGIONS, nregions)
if (nregions > 0)
call rg_prealloc (pm, nregions)
else
call rg_prfree (pm)
call sfree (sp)
return (nregions)
end
# RG_PGREGIONS -- Procedure to compute the column and line limits given
# an x and y position and a default size.
int procedure rg_pgregions (im, pm, rp, max_nregions)
pointer im #I pointer to the image
pointer pm #I pointer to psf matching structure
int rp #I pointer to the current region
int max_nregions #I maximum number of regions
int ncols, nlines, nregions
int x1, x2, y1, y2
pointer sp, region
real x, y, xc, yc
int rg_pstati(), nscan()
pointer rg_pstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (region, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information.
call rg_prealloc (pm, max_nregions)
# Get the constants.
ncols = IM_LEN(im,1)
nlines = IM_LEN(im,2)
# Decode the center.
call rg_pstats (pm, PSFDATA, Memc[region], SZ_LINE)
nregions = min (rp - 1, rg_pstati (pm, NREGIONS))
call sscan (Memc[region])
call gargr (x)
call gargr (y)
# Compute the data region.
if (nscan() >= 2) {
# Compute a more accurate center.
if (rg_pstati (pm, CENTER) == YES) {
call rg_pcntr (im, x, y, max (rg_pstati(pm, PNX),
rg_pstati(pm, PNY)), xc, yc)
} else {
xc = x
yc = y
}
# Compute the data section.
x1 = xc - rg_pstati (pm, DNX) / 2
x2 = x1 + rg_pstati (pm, DNX) - 1
if (IM_NDIM(im) == 1) {
y1 = 1
y2 = 1
} else {
y1 = yc - rg_pstati (pm, DNY) / 2
y2 = y1 + rg_pstati (pm, DNY) - 1
}
# Make sure that the region is on the image.
if (x1 >= 1 && x2 <= IM_LEN(im,1) && y1 >= 1 &&
y2 <= IM_LEN(im,2)) {
Memi[rg_pstatp(pm,RC1)+nregions] = x1
Memi[rg_pstatp(pm,RC2)+nregions] = x2
Memi[rg_pstatp(pm,RL1)+nregions] = y1
Memi[rg_pstatp(pm,RL2)+nregions] = y2
Memr[rg_pstatp(pm,RZERO)+nregions] = INDEFR
Memr[rg_pstatp(pm,RXSLOPE)+nregions] = INDEFR
Memr[rg_pstatp(pm,RYSLOPE)+nregions] = INDEFR
nregions = nregions + 1
}
}
# Reallocate the correct amount of space.
call rg_pseti (pm, NREGIONS, nregions)
if (nregions > 0)
call rg_prealloc (pm, nregions)
else
call rg_prfree (pm)
call sfree (sp)
return (nregions)
end
# RG_PCNTR -- Compute star center using MPC algorithm.
procedure rg_pcntr (im, xstart, ystart, boxsize, xcntr, ycntr)
pointer im #I pointer to the input image
real xstart, ystart #I initial position
int boxsize #I width of the centering box
real xcntr, ycntr #O computed center
int x1, x2, y1, y2, half_box
int ncols, nrows, nx, ny, try
real xinit, yinit
pointer bufptr, sp, x_vect, y_vect
int imgs2r()
begin
# Inialize.
half_box = (boxsize - 1) / 2
xinit = xstart
ncols = IM_LEN (im, 1)
if (IM_NDIM(im) == 1) {
yinit = 1
nrows = 1
} else {
yinit = ystart
nrows = IM_LEN (im, 2)
}
try = 0
# Iterate until pixel shifts are less than one.
repeat {
# Define region to extract.
x1 = max (xinit - half_box, 1.0) +0.5
x2 = min (xinit + half_box, real(ncols)) +0.5
y1 = max (yinit - half_box, 1.0) +0.5
y2 = min (yinit + half_box, real(nrows)) +0.5
nx = x2 - x1 + 1
ny = y2 - y1 + 1
# Extract region around center
bufptr = imgs2r (im, x1, x2, y1, y2)
# Compute the new center.
call smark (sp)
if (IM_NDIM(im) == 1) {
call salloc (x_vect, nx, TY_REAL)
call aclrr (Memr[x_vect], nx)
call rg_prowsum (Memr[bufptr], Memr[x_vect], nx, ny)
call rg_pcenter (Memr[x_vect], nx, xcntr)
ycntr = 1
} else {
call salloc (x_vect, nx, TY_REAL)
call salloc (y_vect, ny, TY_REAL)
call aclrr (Memr[x_vect], nx)
call aclrr (Memr[y_vect], ny)
call rg_prowsum (Memr[bufptr], Memr[x_vect], nx, ny)
call rg_pcolsum (Memr[bufptr], Memr[y_vect], nx, ny)
call rg_pcenter (Memr[x_vect], nx, xcntr)
call rg_pcenter (Memr[y_vect], ny, ycntr)
}
call sfree (sp)
# Check for INDEF centers.
if (IS_INDEFR(xcntr) || IS_INDEFR(ycntr)) {
xcntr = xinit
ycntr = yinit
break
}
# Add in offsets
xcntr = xcntr + x1
ycntr = ycntr + y1
try = try + 1
if (try == 1) {
if ((abs(xcntr-xinit) > 1.0) || (abs(ycntr-yinit) > 1.0)) {
xinit = xcntr
yinit = ycntr
}
} else
break
}
end
# RG_PROWSUM -- Sum all rows in a raster.
procedure rg_prowsum (v, row, nx, ny)
real v[nx,ny] #I the input subraster
real row[ARB] #O the output row sum
int nx, ny #I the dimensions of the subraster
int i, j
begin
do i = 1, ny
do j = 1, nx
row[j] = row[j] + v[j,i]
end
# RG_PCOLSUM -- Sum all columns in a raster.
procedure rg_pcolsum (v, col, nx, ny)
real v[nx,ny] #I the input subraster
real col[ARB] #O the output column sum
int nx, ny #I the dimensions of the subraster
int i, j
begin
do i = 1, ny
do j = 1, nx
col[j] = col[j] + v[i,j]
end
# RG_PCENTER -- Compute center of gravity of array.
procedure rg_pcenter (v, nv, vc)
real v[ARB] #I the input vector
int nv #I the length of the vector
real vc #O the output center
int i
real sum1, sum2, sigma, cont
begin
# Compute first moment
sum1 = 0.0
sum2 = 0.0
call aavgr (v, nv, cont, sigma)
do i = 1, nv
if (v[i] > cont) {
sum1 = sum1 + (i-1) * (v[i] - cont)
sum2 = sum2 + (v[i] - cont)
}
# Determine center
if (sum2 == 0.0)
vc = INDEFR
else
vc = sum1 / sum2
end
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