diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index 43831e7..b9620c1 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -738,7 +738,6 @@ int hg_scanner_300::set_kernelsnap_ver()
 			firmware_sup_dpi_300 = true;
 		else if (atoi(fw.substr(4, 6).c_str()) >= 230210)
 		{
-			firmware_sup_dpi_300 = true;
 			firmware_sup_dpi_600 = true;
 		}	
 		else
diff --git a/hgdriver/hgdev/image_process.cpp b/hgdriver/hgdev/image_process.cpp
index 6a7662a..0aa3513 100644
--- a/hgdriver/hgdev/image_process.cpp
+++ b/hgdriver/hgdev/image_process.cpp
@@ -433,17 +433,14 @@ namespace hg_imgproc
 			float scale = img_conf_.fillhole.fillholeratio / 100.0;
 			int dpi = img_conf_.resolution_dst;
 			
-			if (!param_.is_sup_real_300dpi_)
+			if (!param_.is_sup_real_300dpi_ && !param_.is_sup_real_600dpi_)
 			{
 				dpi = 200;
 			}
-			else
+			else if (param_.is_sup_real_300dpi_ && !param_.is_sup_real_600dpi_)
 			{
-				if (!param_.is_sup_real_600dpi_)
-				{
-					if (dpi >= 300)
-						dpi = 300;
-				}
+				if (dpi >= 300)
+					dpi = 300;
 			}
 
 			float val = dpi / 10;