diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index e8200c7..587278c 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -2506,6 +2506,8 @@ int hg_scanner::device_io_control(unsigned long code, void* data, unsigned* len)
 		SANE_Gamma* v = (SANE_Gamma*)data;
 
 		memcpy(v, custom_gamma_val_, sizeof(*custom_gamma_val_));
+		if (len)
+			*len = image_prc_param_.bits.color_mode;
 
 		return SCANNER_ERR_OK;
 	}
diff --git a/hgdriver/wrapper/hg_log.cpp b/hgdriver/wrapper/hg_log.cpp
index 5ef53ef..10bb5dd 100644
--- a/hgdriver/wrapper/hg_log.cpp
+++ b/hgdriver/wrapper/hg_log.cpp
@@ -506,15 +506,38 @@ extern "C"
 		}
 		std::string local_data_path(void)
 		{
-#ifdef WIN32
-			std::string env("LOCALAPPDATA"), lead("");
-#else
-			std::string env("HOME"), lead(".");
-#endif
-			char* tmp = getenv(env.c_str());
-			std::string home(tmp ? tmp : "");
+			static std::string local_data_path("");
+			static bool load_first = true;
 
-			home += PATH_SEPARATOR + lead;
+			if (load_first)
+			{
+				simple_ini	first;
+
+				load_first = false;
+				if (first.load((get_scanner_path() + "first.cfg").c_str()) == 0)
+				{
+					std::string env = first.get("constraints", "local_data_path");
+					if (env.length())
+						local_data_path = env;
+				}
+			}
+
+			std::string home(local_data_path);
+
+			if (home.empty())
+			{
+#ifdef WIN32
+				std::string env("LOCALAPPDATA"), lead("");
+#else
+				std::string env("HOME"), lead(".");
+#endif
+				char* tmp = getenv(env.c_str());
+				
+				if (tmp)
+					home = tmp;
+
+				home += PATH_SEPARATOR + lead;
+			}
 
 #ifdef OEM_HANWANG
 			home += "HanvonScan";