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include <fset.h>
include <ctype.h>
include <imhdr.h>
include "xregister.h"
# RG_XREGIONS -- Decode the image sections into regions. If the sections string
# is NULL then the regions list is initially empty and depending on the mode
# of the task, XREGISTER will or will not complain.Otherwise the image
# sections specified in the sections string or file are decoded into a
# regions list.
int procedure rg_xregions (list, im, xc, rp)
int list #I pointer to the regions list
pointer im #I pointer to the reference image
pointer xc #I pointer to the cross-correlation structure
int rp #I index of the current region
int fd, nregions
pointer sp, fname, regions
int rg_xgrid(), rg_xgregions(), rg_xrregions(), rg_xstati(), fntgfnb()
int open()
errchk fntgfnb(), open(), close()
begin
call smark (sp)
call salloc (fname, SZ_FNAME, TY_CHAR)
call salloc (regions, SZ_LINE, TY_CHAR)
call rg_xstats (xc, REGIONS, Memc[regions], SZ_LINE)
if (rp < 1 || rp > MAX_NREGIONS || Memc[regions] == EOS) {
nregions = 0
} else if (rg_xgrid (im, xc, rp, MAX_NREGIONS) > 0) {
nregions = rg_xstati (xc, NREGIONS)
} else if (rg_xgregions (im, xc, rp, MAX_NREGIONS) > 0) {
nregions = rg_xstati (xc, NREGIONS)
} else if (list != NULL) {
iferr {
if (fntgfnb (list, Memc[fname], SZ_FNAME) != EOF) {
fd = open (Memc[fname], READ_ONLY, TEXT_FILE)
nregions= rg_xrregions (fd, im, xc, rp, MAX_NREGIONS)
call close (fd)
}
} then
nregions = 0
} else
nregions = 0
call sfree (sp)
return (nregions)
end
# RG_XMKREGIONS -- Create a list of regions by marking image sections
# on the image display.
int procedure rg_xmkregions (im, xc, rp, max_nregions, regions, maxch)
pointer im #I pointer to the reference image
pointer xc #I pointer to the cross-correlation structure
int rp #I index of the current region
int max_nregions #I the maximum number of regions
char regions[ARB] #O the output regions string
int maxch #I maximum size of the output regions string
int op, nregions, wcs, key
pointer sp, region, section, cmd
real xll, yll, xur, yur
int rg_xstati(), clgcur(), gstrcpy()
pointer rg_xstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (region, SZ_LINE, TY_CHAR)
call salloc (section, SZ_LINE, TY_CHAR)
call salloc (cmd, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information,
call rg_xrealloc (xc, max_nregions)
# Initialize.
nregions = min (rp-1, rg_xstati (xc, NREGIONS))
op = 1
# Mark the sections on the display.
while (nregions < max_nregions) {
call printf ("Mark lower left corner of region %d [q to quit].\n")
call pargi (nregions + 1)
if (clgcur ("icommands", xll, yll, wcs, key, Memc[cmd],
SZ_LINE) == EOF)
break
if (key == 'q')
break
call printf ("Mark upper right corner of region %d [q to quit].\n")
call pargi (nregions + 1)
if (clgcur ("icommands", xur, yur, wcs, key, Memc[cmd],
SZ_LINE) == EOF)
break
if (key == 'q')
break
if (xll < 1.0 || xur > IM_LEN(im,1) || yll < 1.0 || yur >
IM_LEN(im,2))
break
Memi[rg_xstatp(xc,RC1)+nregions] = nint (xll)
Memi[rg_xstatp(xc,RC2)+nregions] = nint (xur)
Memi[rg_xstatp(xc,RL1)+nregions] = nint (yll)
Memi[rg_xstatp(xc,RL2)+nregions] = nint (yur)
Memr[rg_xstatp(xc,RZERO)+nregions] = INDEFR
Memr[rg_xstatp(xc,RXSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,RYSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,XSHIFTS)+nregions] = INDEFR
Memr[rg_xstatp(xc,YSHIFTS)+nregions] = INDEFR
nregions = nregions + 1
# Write the first 9 regions into the regions string.
call sprintf (Memc[cmd], SZ_LINE, "[%d:%d,%d:%d] ")
call pargi (nint (xll))
call pargi (nint (xur))
call pargi (nint (yll))
call pargi (nint (yur))
op = op + gstrcpy (Memc[cmd], regions[op], maxch - op + 1)
}
call printf ("\n")
# Reallocate the correct amount of space.
call rg_xseti (xc, NREGIONS, nregions)
if (nregions > 0)
call rg_xrealloc (xc, nregions)
else
call rg_xrfree (xc)
call sfree (sp)
return (nregions)
end
# RG_XGRID - Decode the regions from a grid specification.
int procedure rg_xgrid (im, xc, rp, max_nregions)
pointer im #I pointer to the reference image
pointer xc #I pointer to the cross-correlation structure
int rp #I index of the current region
int max_nregions #I the maximum number of regions
int i, istart, iend, j, jstart, jend, ncols, nlines, nxsample, nysample
int nxcols, nylines, nregions
pointer sp, region, section
int rg_xstati(), nscan(), strcmp()
pointer rg_xstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (region, SZ_LINE, TY_CHAR)
call salloc (section, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information,
call rg_xrealloc (xc, max_nregions)
# Initialize.
call rg_xstats (xc, REGIONS, Memc[region], SZ_LINE)
ncols = IM_LEN(im,1)
nlines = IM_LEN(im,2)
nregions = min (rp - 1, rg_xstati (xc, NREGIONS))
# Decode the grid specification.
call sscan (Memc[region])
call gargwrd (Memc[section], SZ_LINE)
call gargi (nxsample)
call gargi (nysample)
if ((nscan() != 3) || (strcmp (Memc[section], "grid") != 0)) {
call sfree (sp)
return (nregions)
}
# Decode the regions.
if ((nxsample * nysample) > max_nregions) {
nxsample = nint (sqrt (real (max_nregions) * real (ncols) /
real (nlines)))
nysample = real (max_nregions) / real (nxsample)
}
nxcols = ncols / nxsample
nylines = nlines / nysample
jstart = 1 + (nlines - nysample * nylines) / 2
jend = jstart + (nysample - 1) * nylines
do j = jstart, jend, nylines {
istart = 1 + (ncols - nxsample * nxcols) / 2
iend = istart + (nxsample - 1) * nxcols
do i = istart, iend, nxcols {
Memi[rg_xstatp(xc,RC1)+nregions] = i
Memi[rg_xstatp(xc,RC2)+nregions] = i + nxcols - 1
Memi[rg_xstatp(xc,RL1)+nregions] = j
Memi[rg_xstatp(xc,RL2)+nregions] = j + nylines - 1
Memr[rg_xstatp(xc,RZERO)+nregions] = INDEFR
Memr[rg_xstatp(xc,RXSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,RYSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,XSHIFTS)+nregions] = INDEFR
Memr[rg_xstatp(xc,YSHIFTS)+nregions] = INDEFR
nregions = nregions + 1
}
}
call rg_xseti (xc, NREGIONS, nregions)
if (nregions > 0)
call rg_xrealloc (xc, nregions)
else
call rg_xrfree (xc)
call sfree (sp)
return (nregions)
end
# RG_XRREGIONS -- Read and decode the regions from a file.
int procedure rg_xrregions (fd, im, xc, rp, max_nregions)
int fd #I regions file descriptor
pointer im #I pointer to the reference image
pointer xc #I pointer to the cross-correlation structure
int rp #I index of the current region
int max_nregions #I the maximum number of regions
int ncols, nlines, nregions, x1, y1, x2, y2, step
pointer sp, line, section
int rg_xstati(), getline(), rg_xgsections()
pointer rg_xstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (line, SZ_LINE, TY_CHAR)
call salloc (section, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information,
call rg_xrealloc (xc, max_nregions)
# Initialize.
ncols = IM_LEN(im,1)
nlines = IM_LEN(im,2)
nregions = min (rp - 1, rg_xstati (xc, NREGIONS))
# Decode the regions string.
while ((getline (fd, Memc[line]) != EOF) && nregions < max_nregions) {
call sscan (Memc[line])
call gargwrd (Memc[section], SZ_LINE)
while ((Memc[section] != EOS) && (nregions < max_nregions)) {
if (rg_xgsections (Memc[section], x1, x2, step, y1, y2, step,
ncols, nlines) == OK) {
Memi[rg_xstatp(xc,RC1)+nregions] = x1
Memi[rg_xstatp(xc,RC2)+nregions] = x2
Memi[rg_xstatp(xc,RL1)+nregions] = y1
Memi[rg_xstatp(xc,RL2)+nregions] = y2
Memr[rg_xstatp(xc,RZERO)+nregions] = INDEFR
Memr[rg_xstatp(xc,RXSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,RYSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,XSHIFTS)+nregions] = INDEFR
Memr[rg_xstatp(xc,YSHIFTS)+nregions] = INDEFR
nregions = nregions + 1
}
call gargwrd (Memc[section], SZ_LINE)
}
}
# Reallocate the correct amount of space.
call rg_xseti (xc, NREGIONS, nregions)
if (nregions > 0)
call rg_xrealloc (xc, nregions)
else
call rg_xrfree (xc)
call sfree (sp)
return (nregions)
end
# RG_XGREGIONS -- Decode a list of regions from a string containing
# a list of sections.
int procedure rg_xgregions (im, xc, rp, max_nregions)
pointer im #I pointer to the reference image
pointer xc #I pointer to cross-correlation structure
int rp #I the index of the current region
int max_nregions #I the maximum number of regions
int ncols, nlines, nregions, x1, x2, y1, y2, step
pointer sp, section, region
int rg_xstati(), rg_xgsections()
pointer rg_xstatp()
begin
# Allocate working space.
call smark (sp)
call salloc (region, SZ_LINE, TY_CHAR)
call salloc (section, SZ_LINE, TY_CHAR)
# Allocate the arrays to hold the regions information.
call rg_xrealloc (xc, max_nregions)
# Initialize.
call rg_xstats (xc, REGIONS, Memc[region], SZ_LINE)
ncols = IM_LEN(im,1)
nlines = IM_LEN(im,2)
nregions = min (rp - 1, rg_xstati (xc, NREGIONS))
# Decode the sections
call sscan (Memc[region])
call gargwrd (Memc[section], SZ_LINE)
while ((Memc[section] != EOS) && (nregions < max_nregions)) {
if (rg_xgsections (Memc[section], x1, x2, step, y1, y2, step,
ncols, nlines) == OK) {
Memi[rg_xstatp(xc,RC1)+nregions] = x1
Memi[rg_xstatp(xc,RC2)+nregions] = x2
Memi[rg_xstatp(xc,RL1)+nregions] = y1
Memi[rg_xstatp(xc,RL2)+nregions] = y2
Memr[rg_xstatp(xc,RZERO)+nregions] = INDEFR
Memr[rg_xstatp(xc,RXSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,RYSLOPE)+nregions] = INDEFR
Memr[rg_xstatp(xc,XSHIFTS)+nregions] = INDEFR
Memr[rg_xstatp(xc,YSHIFTS)+nregions] = INDEFR
nregions = nregions + 1
}
call gargwrd (Memc[section], SZ_LINE)
}
# Reallocate the correct amount of space.
call rg_xseti (xc, NREGIONS, nregions)
if (nregions > 0)
call rg_xrealloc (xc, nregions)
else
call rg_xrfree (xc)
call sfree (sp)
return (nregions)
end
# RG_XGSECTIONS -- Decode an image section into column and line limits
# and a step size. Sections which describe the whole image are decoded into
# a block ncols * nlines long.
int procedure rg_xgsections (section, x1, x2, xstep, y1, y2, ystep, ncols,
nlines)
char section[ARB] #I the input section string
int x1, x2 #O the output column section limits
int xstep #O the output column step size
int y1, y2 #O the output line section limits
int ystep #O the output line step size
int ncols, nlines #I the maximum number of lines and columns
int ip
int rg_xgdim()
begin
ip = 1
if (rg_xgdim (section, ip, x1, x2, xstep, ncols) == ERR)
return (ERR)
if (rg_xgdim (section, ip, y1, y2, ystep, nlines) == ERR)
return (ERR)
return (OK)
end
# RG_XGDIM -- Decode a single subscript expression to produce the
# range of values for that subscript (X1:X2), and the sampling step size, STEP.
# Note that X1 may be less than, greater than, or equal to X2, and STEP may
# be a positive or negative nonzero integer. Various shorthand notations are
# permitted, as is embedded whitespace.
int procedure rg_xgdim (section, ip, x1, x2, step, limit)
char section[ARB] #I the input image section
int ip #I/O pointer to the position in section string
int x1 #O first limit of dimension
int x2 #O second limit of dimension
int step #O step size of dimension
int limit #I maximum size of dimension
int temp
int ctoi()
begin
x1 = 1
x2 = limit
step = 1
while (IS_WHITE(section[ip]))
ip = ip + 1
if (section[ip] =='[')
ip = ip + 1
while (IS_WHITE(section[ip]))
ip = ip + 1
# Get X1, X2.
if (ctoi (section, ip, temp) > 0) { # [x1
x1 = max (1, min (temp, limit))
if (section[ip] == ':') {
ip = ip + 1
if (ctoi (section, ip, temp) == 0) # [x1:x2
return (ERR)
x2 = max (1, min (temp, limit))
} else
x2 = x1
} else if (section[ip] == '-') {
x1 = limit
x2 = 1
ip = ip + 1
if (section[ip] == '*')
ip = ip + 1
} else if (section[ip] == '*') # [*
ip = ip + 1
while (IS_WHITE(section[ip]))
ip = ip + 1
# Get sample step size, if give.
if (section[ip] == ':') { # ..:step
ip = ip + 1
if (ctoi (section, ip, step) == 0)
return (ERR)
else if (step == 0)
return (ERR)
}
# Allow notation such as "-*:5", (or even "-:5") where the step
# is obviously supposed to be negative.
if (x1 > x2 && step > 0)
step = -step
while (IS_WHITE(section[ip]))
ip = ip + 1
if (section[ip] == ',') {
ip = ip + 1
return (OK)
} else if (section[ip] == ']')
return (OK)
else
return (ERR)
end
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