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include <error.h>
include <imhdr.h>
include <mach.h>
# T_BITCOUNT -- The pixel bits for each image are counted and reported.
procedure t_bitcount ()
pointer imname, imlist, im, typename, sp
bool grand, leftzeroes, verbose, clear_counters, first_time, pixtype_err
int zeroes[NBITS_INT], ones[NBITS_INT], zeroes_tot, ones_tot, ntotal
int nimages, npixels, maxbit, bit, nim, pixtype
pointer imtopenp(), immap()
int imtgetim(), imtlen(), bitcount()
bool clgetb()
errchk immap
begin
call smark (sp)
call salloc (imname, SZ_FNAME, TY_CHAR)
call salloc (typename, SZ_FNAME, TY_CHAR)
imlist = imtopenp ("images")
nimages = imtlen (imlist)
if (nimages <= 0) {
call sfree (sp)
call error (0, "no images in list")
}
grand = clgetb ("grandtotal")
leftzeroes = clgetb ("leftzeroes")
verbose = clgetb ("verbose")
if (grand && verbose)
call printf ("\nGrand totals for:\n\n")
clear_counters = true
pixtype_err = false
first_time = true
for (nim=1; imtgetim (imlist, Memc[imname], SZ_FNAME) != EOF; nim=nim+1)
iferr (im = immap (Memc[imname], READ_ONLY, 0)) {
call erract (EA_WARN)
} else {
if (first_time) {
pixtype = IM_PIXTYPE(im)
first_time = false
} else if (IM_PIXTYPE(im) != pixtype) {
pixtype_err = true
}
if (clear_counters) {
call aclri (zeroes, NBITS_INT)
call aclri (ones, NBITS_INT)
zeroes_tot = 0
ones_tot = 0
ntotal = 0
clear_counters = ! grand
}
npixels = bitcount (im, leftzeroes, zeroes, ones, maxbit)
ntotal = ntotal + npixels
if (verbose) {
call dtstring (IM_PIXTYPE(im), Memc[typename], SZ_FNAME)
call printf ("%s[%d,%d][%s], npix=%d:\n")
call pargstr (Memc[imname])
call pargi (IM_LEN(im,1))
call pargi (IM_LEN(im,2))
call pargstr (Memc[typename])
call pargi (npixels)
}
if (grand && nim != nimages)
next
if (verbose)
call printf ("\n")
if (grand && pixtype_err) {
call eprintf ("Warning: image data types vary!\n\n")
call flush (STDOUT)
call flush (STDERR)
}
if (verbose) {
do bit = 1, maxbit {
zeroes_tot = zeroes_tot + zeroes[bit]
ones_tot = ones_tot + ones[bit]
}
call printf (" bit 0's 1's %%0's %%1's\n")
call printf (" --- --- --- ---- ----\n")
do bit = 1, maxbit {
call printf (" %2d %8d %8d %5.1f %5.1f")
call pargi (bit-1)
call pargi (zeroes[bit])
call pargi (ones[bit])
call pargr (100.*zeroes[bit]/ntotal)
call pargr (100.*ones[bit]/ntotal)
if (bit==maxbit && IM_PIXTYPE(im)!=TY_USHORT)
call printf (" (sign bit)\n")
else
call printf ("\n")
}
call printf (" ------- ------- ---- ----\n")
call printf (" %10d%10d %5.1f %5.1f\n\n\n")
call pargi (zeroes_tot)
call pargi (ones_tot)
call pargr (100.*zeroes_tot/(ntotal*maxbit))
call pargr (100.*ones_tot/(ntotal*maxbit))
} else
do bit = 1, maxbit {
call printf ("%d\t%d\n")
call pargi (zeroes[bit])
call pargi (ones[bit])
}
call imunmap (im)
call flush (STDOUT)
}
call imtclose (imlist)
call sfree (sp)
end
# BITCOUNT -- Accumulate the bit statistics for an image and return
# the number of pixels. The calling routine is responsible for
# zeroing the arrays.
int procedure bitcount (im, leftzeroes, zeroes, ones, maxbit)
pointer im #I image descriptor
bool leftzeroes #I are leftmost zeroes significant?
int zeroes[ARB] #O array to count zeroes / bit
int ones[ARB] #O array to count ones / bit
int maxbit #O number of bits/pixel
int bit, npixels, nrows, ncols, ival, i
long v[IM_MAXDIM]
pointer buf
int imgnli()
errchk imgnli
begin
ncols = IM_LEN(im,1)
nrows = IM_LEN(im,2)
npixels = nrows * ncols
# this will break on machines with 64 bit integers
switch (IM_PIXTYPE(im)) {
case TY_SHORT, TY_USHORT:
maxbit = NBITS_SHORT
case TY_INT, TY_LONG:
maxbit = NBITS_INT
default:
call error (0, "image pixels aren't integers")
}
call amovkl (long(1), v, IM_MAXDIM)
while (imgnli (im, buf, v) != EOF)
do i = 1, ncols {
ival = Memi[buf+i-1]
# special handling for the high order bit
if (ival < 0) {
# convert to 2's complement and tally the sign bit
ival = 2**maxbit - abs(ival)
ones[maxbit] = ones[maxbit] + 1
} else if ((IM_PIXTYPE(im) == TY_USHORT) && (ival > 32767))
ones[maxbit] = ones[maxbit] + 1
else if (leftzeroes)
zeroes[maxbit] = zeroes[maxbit] + 1
for (bit=1; bit<maxbit && ival!=0; bit=bit+1) {
if (mod (ival, 2) == 0)
zeroes[bit] = zeroes[bit] + 1
else
ones[bit] = ones[bit] + 1
ival = ival / 2
}
if (leftzeroes)
do bit = bit, maxbit-1
zeroes[bit] = zeroes[bit] + 1
}
return (npixels)
end
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