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#!/bin/csh -f |
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# RCSid $Id: pbilat.csh,v 1.1 2007/10/22 18:04:38 greg Exp $ |
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# |
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# Bilateral Filter (fixed parameters for now) |
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# |
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set bfrac=0.02 |
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set sigma=0.4 |
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set vmin=1e-7 |
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if ( $#argv != 1 ) then |
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goto userr |
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endif |
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set inp="$1" |
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set rad=`getinfo -d < $inp:q | rcalc -i '-Y ${yr} +X ${xr}' -e '$1=sqrt(xr*yr)*'$bfrac` |
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set extrem=`pextrem -o $inp:q | rcalc -e "vmin:$vmin" -e 'max(a,b):if(a-b,a,b);$1=max($3*.265+$4*.670+$5*.065,vmin)'` |
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set nseg=`ev "ceil(log10($extrem[2]/$extrem[1])/$sigma)"` |
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if ( $nseg > 20 ) set nseg=20 |
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onintr done |
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set tdir=`mktemp -d /tmp/blf.XXXXXX` |
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set gfunc="sq(x):x*x;gfunc(x):if(sq(x)-sq($sigma),0,sq(1-sq(x/$sigma)))" |
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set i=0 |
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set imglist=() |
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while ( $i <= $nseg ) |
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set intens=`ev "$extrem[1]*($extrem[2]/$extrem[1])^($i/$nseg)"` |
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pcomb -e $gfunc:q -e "vmin:$vmin" \ |
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-e 'max(a,b):if(a-b,a,b);l1=max(li(1),vmin)' \ |
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-e "lo=gfunc(log10(l1)-log10($intens))" \ |
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-o $inp > $tdir/gimg.pic |
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pcomb -e 'sf=gi(2);ro=sf*ri(1);go=sf*gi(1);bo=sf*bi(1)' \ |
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-o $inp $tdir/gimg.pic > $tdir/g_p.pic |
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pgblur -r $rad $tdir/g_p.pic \ |
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| pcomb -e 'sf=if(gi(2)-1e-6,1/gi(2),1e6)' \ |
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-e 'ro=sf*ri(1);go=sf*gi(1);bo=sf*bi(1)' \ |
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- "\!pgblur -r $rad $tdir/gimg.pic" \ |
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> $tdir/gimg$i.pic |
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set imglist=($imglist $tdir/gimg$i.pic) |
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@ i++ |
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end |
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cat > $tdir/interp.cal << _EOF_ |
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{ Segmented intensity image interpolation } |
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max(a,b) : if(a-b, a, b); |
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NSEG : $nseg; |
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l1 = max(li(1), $vmin); |
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val = NSEG / log($extrem[2]/$extrem[1]) * (log(l1) - log($extrem[1])); |
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iv = floor(val); |
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ival = if(iv - (NSEG-1), NSEG-1, max(iv, 0)); |
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xval = val - ival; |
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ro = (1-xval)*ri(ival+2) + xval*ri(ival+3); |
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go = (1-xval)*gi(ival+2) + xval*gi(ival+3); |
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bo = (1-xval)*bi(ival+2) + xval*bi(ival+3); |
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_EOF_ |
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pcomb -h -f $tdir/interp.cal -o $inp:q $imglist |
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done: |
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rm -rf $tdir |
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exit 0 |
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userr: |
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echo Usage: $0 input.pic |
