diff --git a/code/base/test_base.cpp b/code/base/test_base.cpp
index 028a618..882250b 100644
--- a/code/base/test_base.cpp
+++ b/code/base/test_base.cpp
@@ -966,10 +966,35 @@ public:
 	}
 	int test_set_auto_distortion(void* data)
 	{
+		if (!data)
+		{
+			return SCANNER_ERR_DATA_DAMAGED;
+		}
+		wchar_t* p = (wchar_t*)data;
+		std::string str;
+
 		int ret = SCANNER_ERR_OK,
-			val = 0;
+			dpi = 0;
 		unsigned int len = sizeof(int);
-		float distortion =0.0;
+		float distortion = 0.0;
+		size_t strl = 0;
+
+		ret = wchar_to_char(str, p, &strl);
+		if (ret == ERROR_INSUFFICIENT_BUFFER)
+		{
+			str.resize(strl);
+			ret = wchar_to_char(str, p, &strl);
+			if (str.empty())
+			{
+				return SCANNER_ERR_DATA_DAMAGED;
+			}
+			dpi = atoi(str.c_str());
+		}
+		if (dpi > 0)
+		{
+			ret = helper_->io_control(IO_CTRL_CODE_SET_DPI, &dpi, &len);
+		}
+
 		parameter* prt = helper_->get_user_input(ui_helper::DATA_FROM_USER, ui_helper::VAL_TYPE_FLOAT, set_test_name_.c_str(), L"请设置畸变值");
 		if (!prt)
 		{