diff --git a/px6_convert.sh b/px6_convert.sh
index 7400e38..2de6ad8 100755
--- a/px6_convert.sh
+++ b/px6_convert.sh
@@ -7,15 +7,15 @@ export OH=$4
 W=$5
 if [ "$OW" == "" ]; then OW=0; fi
 if [ "$OH" == "" ]; then OH=0; fi
+OPTIONS="-resize $W -set depth 8 -set colorspace RGB"
 
 #initial conversion
-convert-im6 -resize $W $INPUT txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^(.*),(.*):.*#(.{6})/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " arr[3] }' > $OUTPUT
+convert-im6 $OPTIONS $INPUT txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^([0-9]*),([0-9]*):.*#([0-9A-Fa-f]{6,8}) +r/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " arr[3] }' > $OUTPUT
 
 echo optimizing >&2
 
 # edge detection
-#convert-im6 -resize $W $INPUT -negate -edge 6 -negate txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^(.*),(.*):.*#000000/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " }' > /tmp/px6_optimize
-convert-im6 -resize $W $INPUT -edge 6 -negate txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^(.*),(.*):.*#000000/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " }' > /tmp/px6_optimize
+convert-im6 $OPTIONS $INPUT -negate -edge 4 -negate txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^([0-9]*),([0-9]*):.*#000000/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " }' > /tmp/px6_optimize
 grep -Ff /tmp/px6_optimize $OUTPUT >  ${OUTPUT}.tmp
 grep -Ff /tmp/px6_optimize $OUTPUT >> ${OUTPUT}.tmp
 grep -Ff /tmp/px6_optimize $OUTPUT >> ${OUTPUT}.tmp