/usr/bin/falsecolor is in radiance 4R0+20110410-1build1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# RCSid $Id: falsecolor.pl,v 2.4 2011/03/23 21:57:11 greg Exp $
use strict;
use File::Temp qw/ tempdir /;
use POSIX qw/ floor /;
my $mult = 179.0; # Multiplier. Default W/sr/m2 -> cd/m2
my $label = 'cd/m2'; # Units shown in legend
my $scale = 1000; # Top of the scale
my $decades = 0; # Default is linear mapping
my $redv = 'def_red(v)'; # Mapping function for R,G,B
my $grnv = 'def_grn(v)';
my $bluv = 'def_blu(v)';
my $ndivs = 8; # Number of lines in legend
my $picture = '-';
my $cpict = '';
my $legwidth = 100; # Legend width and height
my $legheight = 200;
my $docont = ''; # Contours
my $loff = 0; # Offset to align with values
my $doextrem = 0; # Don't mark extrema
my $needfile = 0;
while ($#ARGV >= 0) {
# Options with qualifiers
if ("$ARGV[0]" eq '-lw') { # Legend width
$legwidth = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-lh') { # Legend height
$legheight = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-m') { # Multiplier
$mult = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-s') { # Scale
$scale = $ARGV[1];
shift @ARGV;
if ($scale =~ m/[aA].*/) {
$needfile = 1;
}
} elsif ("$ARGV[0]" eq '-l') { # Label
$label = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-log') { # Logarithmic mapping
$decades = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-r') {
$redv = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-g') {
$grnv = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-b') {
$bluv = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-pal') {
$redv = "$ARGV[1]_red(v)";
$grnv = "$ARGV[1]_grn(v)";
$bluv = "$ARGV[1]_blu(v)";
shift @ARGV;
} elsif ("$ARGV[0]" eq '-i') { # Image for intensity mapping
$picture = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-p') { # Image for background
$cpict = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-ip' || "$ARGV[0]" eq '-pi') {
$picture = $ARGV[1];
$cpict = $ARGV[1];
shift @ARGV;
} elsif ("$ARGV[0]" eq '-n') { # Number of contour lines
$ndivs = $ARGV[1];
shift @ARGV;
# Switches
} elsif ("$ARGV[0]" eq '-cl') { # Contour lines
$docont = 'a';
$loff = 0.48;
} elsif ("$ARGV[0]" eq '-cb') { # Contour bands
$docont = 'b';
$loff = 0.52;
} elsif ("$ARGV[0]" eq '-e') {
$doextrem = 1;
$needfile = 1;
# Oops! Illegal option
} else {
die("bad option \"$ARGV[0]\"\n");
}
shift @ARGV;
}
# Temporary directory. Will be removed upon successful program exit.
my $td = tempdir( CLEANUP => 1 );
if ($needfile == 1 && $picture eq '-') {
# Pretend that $td/stdin.rad is the actual filename.
$picture = "$td/stdin.hdr";
open(FHpic, ">$picture") or
die("Unable to write to file $picture\n");
# Input is from STDIN: Capture to file.
while (<>) {
print FHpic;
}
close(FHpic);
if ($cpict eq '-') {
$cpict = "$td/stdin.hdr";
}
}
# Find a good scale for auto mode.
if ($scale =~ m/[aA].*/) {
my @histo = split(/\s/, `phisto $picture| tail -2`);
# e.g. $ phisto tests/richmond.hdr| tail -2
# 3.91267 14
# 3.94282 6
my $LogLmax = $histo[0];
$scale = $mult / 179 * 10**$LogLmax;
}
my $pc0 = "$td/pc0.cal";
open(FHpc0, ">$pc0");
print FHpc0 <<EndOfPC0;
PI : 3.14159265358979323846 ;
scale : $scale ;
mult : $mult ;
ndivs : $ndivs ;
gamma : 2.2;
or(a,b) : if(a,a,b);
EPS : 1e-7;
neq(a,b) : if(a-b-EPS,1,b-a-EPS);
btwn(a,x,b) : if(a-x,-1,b-x);
clip(x) : if(x-1,1,if(x,x,0));
frac(x) : x - floor(x);
boundary(a,b) : neq(floor(ndivs*a+.5),floor(ndivs*b+.5));
spec_red(x) = 1.6*x - .6;
spec_grn(x) = if(x-.375, 1.6-1.6*x, 8/3*x);
spec_blu(x) = 1 - 8/3*x;
pm3d_red(x) = sqrt(x) ^ gamma;
pm3d_grn(x) = x*x*x ^ gamma;
pm3d_blu(x) = clip(sin(2*PI*x)) ^ gamma;
hot_red(x) = clip(3*x) ^ gamma;
hot_grn(x) = clip(3*x - 1) ^ gamma;
hot_blu(x) = clip(3*x - 2) ^ gamma;
interp_arr2(i,x,f):(i+1-x)*f(i)+(x-i)*f(i+1);
interp_arr(x,f):if(x-1,if(f(0)-x,interp_arr2(floor(x),x,f),f(f(0))),f(1));
def_redp(i):select(i,0.18848,0.05468174,
0.00103547,8.311144e-08,7.449763e-06,0.0004390987,0.001367254,
0.003076,0.01376382,0.06170773,0.1739422,0.2881156,0.3299725,
0.3552663,0.372552,0.3921184,0.4363976,0.6102754,0.7757267,
0.9087369,1,1,0.9863);
def_red(x):interp_arr(x/0.0454545+1,def_redp);
def_grnp(i):select(i,0.0009766,2.35501e-05,
0.0008966244,0.0264977,0.1256843,0.2865799,0.4247083,0.4739468,
0.4402732,0.3671876,0.2629843,0.1725325,0.1206819,0.07316644,
0.03761026,0.01612362,0.004773749,6.830967e-06,0.00803605,
0.1008085,0.3106831,0.6447838,0.9707);
def_grn(x):interp_arr(x/0.0454545+1,def_grnp);
def_blup(i):select(i,0.2666,0.3638662,0.4770437,
0.5131397,0.5363797,0.5193677,0.4085123,0.1702815,0.05314236,
0.05194055,0.08564082,0.09881395,0.08324373,0.06072902,
0.0391076,0.02315354,0.01284458,0.005184709,0.001691774,
2.432735e-05,1.212949e-05,0.006659406,0.02539);
def_blu(x):interp_arr(x/0.0454545+1,def_blup);
isconta = if(btwn(0,v,1),or(boundary(vleft,vright),boundary(vabove,vbelow)),-1);
iscontb = if(btwn(0,v,1),btwn(.4,frac(ndivs*v),.6),-1);
ra = 0;
ga = 0;
ba = 0;
in = 1;
ro = if(in,clip($redv),ra);
go = if(in,clip($grnv),ga);
bo = if(in,clip($bluv),ba);
EndOfPC0
my $pc1 = "$td/pc1.cal";
open(FHpc1, ">$pc1");
print FHpc1 <<EndOfPC1;
norm : mult/scale/le(1);
v = map(li(1)*norm);
vleft = map(li(1,-1,0)*norm);
vright = map(li(1,1,0)*norm);
vabove = map(li(1,0,1)*norm);
vbelow = map(li(1,0,-1)*norm);
map(x) = x;
ra = ri(nfiles);
ga = gi(nfiles);
ba = bi(nfiles);
EndOfPC1
my $pc0args = "-f $pc0";
my $pc1args = "-f $pc1";
# Contour lines or bands
if ($docont ne '') {
$pc0args .= " -e 'in=iscont$docont'";
}
if ($cpict eq '') {
$pc1args .= " -e 'ra=0;ga=0;ba=0'";
} elsif ($cpict eq $picture) {
$cpict = '';
}
# Logarithmic mapping
if ($decades > 0) {
$pc1args .= " -e 'map(x)=if(x-10^-$decades,log10(x)/$decades+1,0)'";
}
# Colours in the legend
my $scolpic = "$td/scol.hdr";
# Labels in the legend
my $slabpic = "$td/slab.hdr";
my $cmd;
if (($legwidth > 20) && ($legheight > 40)) {
# Legend: Create the text labels
my $sheight = floor($legheight / $ndivs + 0.5);
$legheight = $sheight * $ndivs;
$loff = floor($loff * $sheight + 0.5);
my $text = "$label";
for (my $i=0; $i<$ndivs; $i++) {
my $imap = ($ndivs - 0.5 - $i) / $ndivs;
my $value = $scale;
if ($decades > 0) {
$value *= 10**(($imap - 1) * $decades);
} else {
$value *= $imap;
}
# Have no more than 3 decimal places
$value =~ s/(\.[0-9]{3})[0-9]*/$1/;
$text .= "\n$value";
}
$cmd = "echo '$text' | psign -s -.15 -cf 1 1 1 -cb 0 0 0";
$cmd .= " -h $sheight > $slabpic";
system $cmd;
# Legend: Create the background colours
$cmd = "pcomb $pc0args -e 'v=(y+.5)/yres;vleft=v;vright=v'";
$cmd .= " -e 'vbelow=(y-.5)/yres;vabove=(y+1.5)/yres'";
$cmd .= " -x $legwidth -y $legheight > $scolpic";
system $cmd;
} else {
# Legend is too small to be legible. Don't bother doing one.
$legwidth = 0;
$legheight = 0;
$loff = 0;
# Create dummy colour scale and legend labels so we don't
# need to change the final command line.
open(FHscolpic, ">$scolpic");
print FHscolpic "\n-Y 1 +X 1\naaa\n";
close(FHscolpic);
open(FHslabpic, ">$slabpic");
print FHslabpic "\n-Y 1 +X 1\naaa\n";
close(FHslabpic);
}
# Legend: Invert the text labels (for dropshadow)
my $slabinvpic = "$td/slabinv.hdr";
$cmd = "pcomb -e 'lo=1-gi(1)' $slabpic > $slabinvpic";
system $cmd;
my $loff1 = $loff - 1;
# Command line without extrema
$cmd = "pcomb $pc0args $pc1args $picture $cpict";
$cmd .= "| pcompos $scolpic 0 0 +t .1 $slabinvpic 2 $loff1";
$cmd .= " -t .5 $slabpic 0 $loff - $legwidth 0";
if ($doextrem == 1) {
# Get min/max image luminance
my $cmd1 = 'pextrem -o ' . $picture;
my $retval = `$cmd1`;
# e.g.
# x y r g b
# 193 207 3.070068e-02 3.118896e-02 1.995850e-02
# 211 202 1.292969e+00 1.308594e+00 1.300781e+00
my @extrema = split(/\s/, $retval);
my ($lxmin, $ymin, $rmin, $gmin, $bmin, $lxmax, $ymax, $rmax, $gmax, $bmax) = @extrema;
$lxmin += $legwidth;
$lxmax += $legwidth;
# Weighted average of R,G,B
my $minpos = "$lxmin $ymin";
my $minval = ($rmin * .27 + $gmin * .67 + $bmin * .06) * $mult;
$minval =~ s/(\.[0-9]{3})[0-9]*/$1/;
my $maxpos = "$lxmax $ymax";
my $maxval = ($rmax * .27 + $gmax * .67 + $bmax * .06) * $mult;
$maxval =~ s/(\.[0-9]{3})[0-9]*/$1/;
# Create the labels for min/max intensity
my $minvpic = "$td/minv.hdr";
$cmd1 = "psign -s -.15 -a 2 -h 16 $minval > $minvpic";
system $cmd1;
my $maxvpic = "$td/maxv.hdr";
$cmd1 = "psign -s -.15 -a 2 -h 16 $maxval > $maxvpic";
system $cmd1;
# Add extrema labels to command line
$cmd .= " $minvpic $minpos $maxvpic $maxpos";
}
# Process image and combine with legend
system "$cmd";
#EOF
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