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#!/bin/csh -f |
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< |
# SCCSid "$SunId$ LBL" |
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# RCSid: $Id$ |
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# |
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# Normalize a pattern for tiling (-b option blends edges) by removing |
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# lowest frequencies from image (-f option) and reducing to |
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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 $argv[1] -p 1" |
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set pf="$pf -x $argv[1] -y $argv[1] -p 1 -r .67" |
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breaksw |
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case -f: |
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set ha="$ha -f" |
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set td=/usr/tmp/np$$ |
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mkdir $td |
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cat > $td/coef.fmt << '_EOF_' |
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< |
rm=${ $25 }; gm=${ $26 }; bm=${ $27 }; |
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< |
rcx=${ $1 }; gcx=${ $9 }; bcx=${ $17 }; |
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< |
rcy=${ $2 }; gcy=${ $10 }; bcy=${ $18 }; |
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< |
rsx=${ $3 }; gsx=${ $11 }; bsx=${ $19 }; |
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< |
rsy=${ $4 }; gsy=${ $12 }; bsy=${ $20 }; |
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< |
rcxcy=${ $5 }; gcxcy=${ $13 }; bcxcy=${ $21 }; |
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rcxsy=${ $6 }; gcxsy=${ $14 }; bcxsy=${ $22 }; |
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rsxcy=${ $7 }; gsxcy=${ $15 }; bsxcy=${ $23 }; |
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rsxsy=${ $8 }; gsxsy=${ $16 }; bsxsy=${ $24 }; |
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rm:${ $25 }; gm:${ $26 }; bm:${ $27 }; |
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rcx:${ $1 }; gcx:${ $9 }; bcx:${ $17 }; |
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rcy:${ $2 }; gcy:${ $10 }; bcy:${ $18 }; |
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rsx:${ $3 }; gsx:${ $11 }; bsx:${ $19 }; |
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rsy:${ $4 }; gsy:${ $12 }; bsy:${ $20 }; |
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rcxcy:${ $5 }; gcxcy:${ $13 }; bcxcy:${ $21 }; |
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rcxsy:${ $6 }; gcxsy:${ $14 }; bcxsy:${ $22 }; |
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rsxcy:${ $7 }; gsxcy:${ $15 }; bsxcy:${ $23 }; |
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rsxsy:${ $8 }; gsxsy:${ $16 }; bsxsy:${ $24 }; |
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'_EOF_' |
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cat > $td/coef.cal << '_EOF_' |
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$1=$3*2*cx; $2=$3*2*cy; $3=$3*2*sx; $4=$3*2*sy; |
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$25=$3; $26=$4; $27=$5; |
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cx=cos(wx); cy=cos(wy); |
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sx=sin(wx); sy=sin(wy); |
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< |
wx=2*PI*($1+.5)/xres; wy=2*PI*($2+.5)/yres; |
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wx=2*PI/xres*($1+.5); wy=2*PI/yres*($2+.5); |
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'_EOF_' |
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cat > $td/fsub.cal << '_EOF_' |
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+ |
PI:3.14159265358979323846; |
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ro=ri(1)*rm/(rm+rcx*cx+rcy*cy+rsx*sx+rsy*sy |
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+rcxcy*cx*cy+rcxsy*cx*sy+rsxcy*sx*cy+rsxsy*sx*sy); |
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go=gi(1)*gm/(gm+gcx*cx+gcy*cy+gsx*sx+gsy*sy |
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+bcxcy*cx*cy+bcxsy*cx*sy+bsxcy*sx*cy+bsxsy*sx*sy); |
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cx=cos(wx); cy=cos(wy); |
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sx=sin(wx); sy=sin(wy); |
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wx=2*PI*(x+.5)/xres; wy=2*PI*(y+.5)/yres; |
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< |
PI=3.14159265358979323846; |
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wx=2*PI/xres*(x+.5); wy=2*PI/yres*(y+.5); |
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'_EOF_' |
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foreach f ($*) |
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if ( $?verb ) then |
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echo computing Fourier coefficients... |
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endif |
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pfilt -1 -x 32 -y 32 $td/pf | pvalue -h \ |
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| rcalc -f $td/coef.cal -e 'xres=32;yres=32' \ |
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> |
| rcalc -e 'xres:32;yres:32' -f $td/coef.cal \ |
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| total -m | rcalc -o $td/coef.fmt \ |
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> $td/coef |
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if ( $?verb ) then |
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cat $td/coef |
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echo removing low frequencies... |
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endif |
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< |
pcomb -f $td/fsub.cal -f $td/coef \ |
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< |
-e "xres=$resolu[1];yres=$resolu[2]" \ |
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$td/pf > $td/hf |
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pcomb -f $td/coef -f $td/fsub.cal $td/pf > $td/hf |
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donefsub: |
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if ( $?blend ) then |
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if ( $?verb ) then |
