diff --git a/NanScan/Barcode.py b/NanScan/Barcode.py
index 851894c..ef8f162 100644
--- a/NanScan/Barcode.py
+++ b/NanScan/Barcode.py
@@ -81,7 +81,9 @@ class Barcode(Analyzer):
 		self.dotsPerMillimeterY = float( image.dotsPerMeterY() ) / 1000.0
 
 		file = TemporaryFile.create()
-		image.save( file, 'PNG' )
+		# Use BMP format instead of PNG, for performance reasons. 
+		# BMP takes about 0.5 seconds whereas PNG takes 13.
+		image.save( file, 'BMP' )
 		command = '/home/albert/d/git/exact-image-0.5.0/objdir/frontends/bardecode'
 		content = self.spawn( command, file )
 		self.parseBardecodeOutput( content )
diff --git a/NanScan/DataMatrix.py b/NanScan/DataMatrix.py
index 258f45c..7c5a53f 100644
--- a/NanScan/DataMatrix.py
+++ b/NanScan/DataMatrix.py
@@ -132,7 +132,9 @@ class DataMatrix(Analyzer):
 		self.dotsPerMillimeterY = float( image.dotsPerMeterY() ) / 1000.0
 
 		file = TemporaryFile.create()
-		image.save( file, 'PNG' )
+		# Use BMP format instead of PNG, for performance reasons. 
+		# BMP takes about 0.5 seconds whereas PNG takes 13.
+		image.save( file, 'BMP' )
 		command = 'dmtxread'
 		content = self.spawn( command, '-n', '-v', file )
 		self.parseOutput( content )
diff --git a/NanScan/Ocr.py b/NanScan/Ocr.py
index d2efce4..a734b8e 100755
--- a/NanScan/Ocr.py
+++ b/NanScan/Ocr.py
@@ -167,7 +167,9 @@ class Ocr(Analyzer):
 		#self.boxes = self.parseTesseractOutput(txt)
 
 		# Cuneiform Steps
-		self.file = TemporaryFile.create( '.png' )
+		# Use BMP format instead of PNG, for performance reasons. 
+		# BMP takes about 0.5 seconds whereas PNG takes 13.
+		self.file = TemporaryFile.create( '.bmp' )
 		image.save( self.file )
 		txt = lower( self.cuneiform() )
 		self.boxes = self.parseCuneiformOutput(txt)