diff --git a/hgdriver/hgdev/image_process.cpp b/hgdriver/hgdev/image_process.cpp
index 8007015..ee55051 100644
--- a/hgdriver/hgdev/image_process.cpp
+++ b/hgdriver/hgdev/image_process.cpp
@@ -638,7 +638,7 @@ namespace hg_imgproc
 
 			mats_.clear();
 
-			CImageApplyFadeBackGroudColor fade(40, 30, img_conf_.fadebackrange);
+			CImageApplyFadeBackGroudColor fade(40, 0, img_conf_.fadebackrange);
 			for(size_t i = 0; i < mats.size();i++)
 			{
 				fade.apply(mats[i],img_conf_.is_duplex);