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greg |
1.1 |
#!/bin/csh -f
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# SCCSid "$SunId$ LBL"
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#
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greg |
1.2 |
# Normalize a pattern for tiling (-b option blends edges) by removing
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# lowest frequencies from image and reducing to standard size (-r option)
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greg |
1.1 |
#
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greg |
1.2 |
set pf="pfilt -e 2"
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while ($#argv > 0)
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switch ($argv[1])
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case -r:
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shift argv
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set pf="$pf -x $argv[1] -y $argv[1] -p 1"
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breaksw
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case -b:
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set blend
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breaksw
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greg |
1.3 |
case -v:
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set verb
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breaksw
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greg |
1.2 |
case -*:
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echo bad option $argv[1]
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exit 1
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default:
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goto dofiles
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endsw
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shift argv
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end
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dofiles:
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onintr quit
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set td=/usr/tmp/np$$
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mkdir $td
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set ha=$0
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set ha=$ha:t
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if ( $?blend ) then
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set ha="$ha -b"
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else
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mknod $td/hf p
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endif
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greg |
1.1 |
foreach f ($*)
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greg |
1.3 |
if ( $?verb ) then
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echo $f\:
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echo adjusting exposure/size...
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endif
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greg |
1.2 |
$pf $f > $td/pf
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getinfo < $td/pf > $f
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ed - $f << _EOF_
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i
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$ha
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.
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w
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q
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_EOF_
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greg |
1.3 |
set resolu=`getinfo -d < $td/pf | sed 's/-Y \([0-9]*\) +X \([0-9]*\)/\2 \1/'`
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if ( $?verb ) then
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echo computing Fourier coefficients...
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endif
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set coef=`pfilt -1 -x 32 -y 32 $td/pf | pvalue -h -b | rcalc -e '$1=2*$3*cos(wx);$2=2*$3*cos(wy);$3=2*$3*sin(wx);$4=2*$3*sin(wy);$5=4*$3*cos(wx)*cos(wy);$6=4*$3*cos(wx)*sin(wy);$7=4*$3*sin(wx)*cos(wy);$8=4*$3*sin(wx)*sin(wy);' -e 'wx=2*PI/32*$1;wy=2*PI/32*$2' | total -m`
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if ( $?verb ) then
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echo "cosx cosy sinx siny"
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echo $coef[1-4]
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echo "cosx*cosy cosx*siny sinx*cosy sinx*siny"
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echo $coef[5-8]
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echo removing low frequencies...
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endif
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greg |
1.2 |
if ( ! $?blend ) then
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greg |
1.3 |
( getinfo - < $td/hf >> $f & ) > /dev/null
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greg |
1.2 |
endif
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greg |
1.3 |
pcomb -e 'ro=f*ri(1);go=f*gi(1);bo=f*bi(1);f=(i-fc-fs-f0-f1)/i' \
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-e 'i=.263*ri(1)+.655*gi(1)+.082*bi(1)' \
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greg |
1.1 |
-e "fc=$coef[1]*cos(wx)+$coef[2]*cos(wy)" \
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-e "fs=$coef[3]*sin(wx)+$coef[4]*sin(wy)" \
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-e "f0=$coef[5]*cos(wx)*cos(wy)+$coef[6]*cos(wx)*sin(wy)" \
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-e "f1=$coef[7]*sin(wx)*cos(wy)+$coef[8]*sin(wx)*sin(wy)" \
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-e "wx=2*3.1416/$resolu[1]*x;wy=2*3.1416/$resolu[2]*y" \
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greg |
1.2 |
$td/pf > $td/hf
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if ( $?blend ) then
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greg |
1.3 |
if ( $?verb ) then
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echo blending edges...
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endif
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greg |
1.2 |
@ mar= $resolu[1] - 3
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pcompos -x 3 $td/hf 0 0 > $td/left
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pcompos $td/hf -$mar 0 > $td/right
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pcomb -e 'ro=f(ri);go=f(gi);bo=f(bi)' \
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-e 'f(p)=(3-x)/7*p(1)+(4+x)/7*p(2)' \
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$td/right $td/left > $td/left.patch
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pcomb -e 'ro=f(ri);go=f(gi);bo=f(bi)' \
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-e 'f(p)=(1+x)/7*p(1)+(6-x)/7*p(2)' \
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$td/left $td/right > $td/right.patch
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pcompos $td/hf 0 0 $td/left.patch 0 0 $td/right.patch $mar 0 \
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> $td/hflr
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@ mar= $resolu[2] - 3
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pcompos -y 3 $td/hflr 0 0 > $td/bottom
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pcompos $td/hflr 0 -$mar > $td/top
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pcomb -e 'ro=f(ri);go=f(gi);bo=f(bi)' \
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-e 'f(p)=(3-y)/7*p(1)+(4+y)/7*p(2)' \
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$td/top $td/bottom > $td/bottom.patch
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pcomb -e 'ro=f(ri);go=f(gi);bo=f(bi)' \
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-e 'f(p)=(1+y)/7*p(1)+(6-y)/7*p(2)' \
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$td/bottom $td/top > $td/top.patch
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pcompos $td/hflr 0 0 $td/bottom.patch 0 0 $td/top.patch 0 $mar \
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| getinfo - >> $f
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endif
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greg |
1.3 |
if ( $?verb ) then
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echo $f done.
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endif
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greg |
1.1 |
end
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greg |
1.2 |
quit:
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rm -rf $td
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