--- FuzzyOcr.preps	2006-12-10 08:32:24.000000000 -0700
+++ FuzzyOcr.preps	2006-12-10 12:39:32.000000000 -0700
@@ -32,3 +32,10 @@
     command = pnmtotiff
     args = -color -truecolor
 }
+
+# Uses pamditherbw with thresholding on the PAM file
+preprocessor pamthreshold {
+    command = pamthreshold
+    args = -threshold
+}
+
--- FuzzyOcr.scansets	2006-12-10 08:32:25.000000000 -0700
+++ FuzzyOcr.scansets	2006-12-10 12:37:32.000000000 -0700
@@ -18,20 +18,37 @@
     args = -s5 -i $input
 }
 
+## Inverted Ocrad scanset with decolorization
+#scanset ocrad-decolorize-invert {
+#    preprocessors = ppmtopgm, pamthreshold, pamtopnm
+#    command = $ocrad
+#    args = -s5 -i $input
+#}
+
+## Ocrad scanset with decolorization
+#scanset ocrad-decolorize {
+#    preprocessors = ppmtopgm, pamthreshold, pamtopnm
+#    command = $ocrad
+#    args = -s5 $input
+#}
+
 # Inverted Ocrad scanset with decolorization
+# (without pamthreshold - for netpbm < 10.34)
 scanset ocrad-decolorize-invert {
-    preprocessors = ppmtopgm, pamthreshold, pamtopnm
+    preprocessors = ppmtopgm, pamditherbw, pamtopnm
     command = $ocrad
     args = -s5 -i $input
 }
 
 # Ocrad scanset with decolorization
+# (without pamthreshold - for netpbm < 10.34)
 scanset ocrad-decolorize {
-    preprocessors = ppmtopgm, pamthreshold, pamtopnm
+    preprocessors = ppmtopgm, pamditherbw, pamtopnm
     command = $ocrad
     args = -s5 $input
 }
 
+
 # Standard Gocr Scanset
 scanset gocr {
     command = $gocr
@@ -59,4 +76,4 @@
 #    preprocessors = normalize, invert, normalize
 #    command = $gocr
 #    args = -i $input
-#}
\ No newline at end of file
+#}