--- ray/src/px/pdelta.csh	2003/02/22 02:07:27	3.1
+++ ray/src/px/pdelta.csh	2008/11/10 19:08:19	3.3
@@ -1,10 +1,10 @@
 #!/bin/csh -f
-# RCSid: $Id: pdelta.csh,v 3.1 2003/02/22 02:07:27 greg Exp $
+# RCSid: $Id: pdelta.csh,v 3.3 2008/11/10 19:08:19 greg Exp $
 #
 # Compute 1976 CIE Lab deltaE* between two Radiance pictures
 #
 if ($#argv != 2) then
-	echo "Usage: $0 picture1 picture2 > output.pic"
+	echo "Usage: $0 picture1 picture2 > output.hdr"
 	exit 1
 endif
 set cielab='sq(x):x*x;Ls(Yi):if(Yi/Yw-.01,116*(Yi/Yw)^(1/3)-16,903.3*Yi/Yw);as(Xi,Yi,Zi):500*((Xi/Xw)^(1/3)-(Yi/Yw)^(1/3));bs(Xi,Yi,Zi):200*((Yi/Yw)^(1/3)-(Zi/Zw)^(1/3));dE(X1,Y1,Z1,X2,Y2,Z2):sqrt(sq(Ls(Y1)-Ls(Y2))+sq(as(X1,Y1,Z1)-as(X2,Y2,Z2))+sq(bs(X1,Y1,Z1)-bs(X2,Y2,Z2)));'
@@ -22,10 +22,11 @@ endif
 if ( "`getinfo < $f2:q | grep '^FORMAT=32-bit_rle_xyze'`" == "" ) then
 	set inp2='x2=X(ri(2),gi(2),bi(2));y2=Y(ri(2),gi(2),bi(2));z2=Z(ri(2),gi(2),bi(2))'
 endif
-pfilt -1 -x 128 -y 128 -p 1 $f1:q | pvalue -o -h -H -d > /tmp/tf$$.dat
-set wht=(`total -u /tmp/tf$$.dat`)
-set avg=`rcalc -e '$1=$2' /tmp/tf$$.dat | total -m`
-rm /tmp/tf$$.dat
+set tempf=`mktemp /tmp/tf.XXXXXX`
+pfilt -1 -x 128 -y 128 -p 1 $f1:q | pvalue -o -h -H -d > $tempf
+set wht=(`total -u $tempf`)
+set avg=`rcalc -e '$1=$2' $tempf | total -m`
+rm $tempf
 pcomb -e $cielab:q -e $rgb2xyz:q \
 	-e "Yw:179*3*$avg; Xw:$wht[1]*Yw/$wht[2]; Zw:$wht[3]*Yw/$wht[2]" \
 	-e $inp1:q -e $inp2:q -e 'lo=dE(x1,y1,z1,x2,y2,z2)' \