diff --git a/lib/mask.cpp b/lib/mask.cpp
index bcb0c9b..2508b9b 100644
--- a/lib/mask.cpp
+++ b/lib/mask.cpp
@@ -1,5 +1,6 @@
 #include "mask.h"
 #include <math.h>
+#include <stdio.h>
 
 namespace Mask
 {
@@ -21,4 +22,17 @@ namespace Mask
 		return newMask;
 	}
 
+	void printMask( mask * mask)
+	{
+		for (int i = 0; i < mask->size; ++i)
+		{
+			for (int j = 0; j < mask->size; ++j)
+			{
+				printf("%d\t", mask->mask[mask->size * i + j]);
+			}
+			printf("\n");
+		}
+		printf("\n");
+	}
+
 }
diff --git a/lib/mask.h b/lib/mask.h
index bcb4013..c33c028 100644
--- a/lib/mask.h
+++ b/lib/mask.h
@@ -12,6 +12,7 @@ namespace Mask
 	};
 
 	mask * createCircleMask(int size, bool gradient = false);
+	void printMask(mask *mask);
 }
 
 #endif /* ifndef _MASK_H_ */
diff --git a/qt/aigoqt.cpp b/qt/aigoqt.cpp
index ed527e9..4b8ab6d 100644
--- a/qt/aigoqt.cpp
+++ b/qt/aigoqt.cpp
@@ -30,7 +30,8 @@ void AigoQt::updateImage( void )
 	Image::threshold(s, blackImageThreshold->value(), whiteImageThreshold->value());
 	SDL_BlitSurface(s, NULL, copy, NULL);
 
-	Mask::mask *mask = Mask::createCircleMask(4);
+	Mask::mask *mask = Mask::createCircleMask(10);
+	Mask::printMask(mask);
 
 	if (checkErosion->isChecked()) Image::erosion(s, copy, mask);
 	if (checkDilation->isChecked()) Image::dilation(s, copy, mask);