diff --git a/hgdriver/hgdev/image_process.cpp b/hgdriver/hgdev/image_process.cpp
index ae7f2f4..a79799b 100644
--- a/hgdriver/hgdev/image_process.cpp
+++ b/hgdriver/hgdev/image_process.cpp
@@ -867,7 +867,7 @@ namespace hg_imgproc
 			edgeScale[1] = low;
 			edgeScale[2] = l;
 			edgeScale[3] = r;
-			CImageApplyOutHole outh(val, edgeScale,50);
+			CImageApplyOutHole outh(val, edgeScale, 20);
 
 			outh.apply(mats,img_conf_.is_duplex);			
 			mats_ = mats;