diff --git a/hgdriver/hgdev/image_process.cpp b/hgdriver/hgdev/image_process.cpp
index 8afdf20..ed1001f 100644
--- a/hgdriver/hgdev/image_process.cpp
+++ b/hgdriver/hgdev/image_process.cpp
@@ -449,7 +449,7 @@ namespace hg_imgproc
 			edgeScale[1] = low;
 			edgeScale[2] = l;
 			edgeScale[3] = r;
-			CImageApplyOutHole outh(val, edgeScale, 50);
+			CImageApplyOutHole outh(val, edgeScale, 20);
 			outh.apply(v, true);
 			if (v.empty())
 			{