@@ -31,8 +31,7 @@ repfile="${outdir}/${test}.rep"

 # $1=value1, $2=value2, $3=threshold

 # prints 0 if absolute difference between value1 and value2 is <= threshold

 compare(){

-    v=$(echo "scale=2; if ($1 >= $2) { $1 - $2 } else { $2 - $1 }" | bc)

-    echo "if ($v <= $3) { 0 } else { 1 }" | bc

+    echo "scale=2; v = $1 - $2; if (v < 0) v = -v; if (v > $3) r = 1; r" | bc

 }

 do_tiny_psnr(){