diff --git a/sane/gb_json.cpp b/sane/gb_json.cpp
index add68b7..78bcedb 100644
--- a/sane/gb_json.cpp
+++ b/sane/gb_json.cpp
@@ -1190,6 +1190,20 @@ namespace gb
         return val;
     }
 
+    sane_config_schm* sane_config_schm::copy(void)
+    {
+        sane_config_schm    *cp = new sane_config_schm(scanner_);
+        std::string         val(jsn_->to_string(false));
+
+        cp->scheme_name_ = scheme_name_;
+        cp->file_ = file_;
+        cp->jsn_->attach_text(&val[0]);
+        cp->id_name_ = id_name_;
+        val = def_val_->to_string(false);
+        cp->def_val_->attach_text(&val[0]);
+
+        return cp;
+    }
     bool sane_config_schm::load_from_file(const char* file)
     {
         clear();
@@ -1246,6 +1260,16 @@ namespace gb
         id_name_[sn] = name;
         def_val_->set_value(name, to_hex_letter(val, bytes).c_str());
     }
+    void sane_config_schm::copy_default_value(sane_config_schm* from)
+    {
+        if(from)
+        {
+            std::string t(from->def_val_->to_string(false));
+
+            id_name_ = from->id_name_;
+            def_val_->attach_text(&t[0]);
+        }
+    }
     bool sane_config_schm::first_config(std::string& name, std::string& val)
     {
         bool        ret = false;
@@ -1274,6 +1298,18 @@ namespace gb
 
         return ret;
     }
+    bool sane_config_schm::get_config(const char* name, std::string& val)
+    {
+        bool ret = jsn_ ? jsn_->get_value(name, val) : false;
+
+        if(!ret && def_val_)
+            ret = def_val_->get_value(name, val);
+
+        if(ret)
+            val = sane_config_schm::from_hex_letter(val.c_str(), val.length());
+
+        return ret;
+    }
     void sane_config_schm::begin_setting(bool restore)
     {
         if (bkp_)
@@ -1332,6 +1368,36 @@ namespace gb
         else
             jsn_->set_value(name, hex_v.c_str());
     }
+    bool sane_config_schm::has_changed(void)
+    {
+        if(!bkp_)
+            return false;
+
+        std::map<std::string, std::string>  old;
+        std::string n(""), v("");
+        if(bkp_->first_child(v, &n))
+        {
+            do
+            {
+                old[n] = v;
+            }while(bkp_->next_child(v, &n));
+        }
+
+        if(jsn_->first_child(v, &n))
+        {
+            do
+            {
+                if(old.count(n) == 0)
+                    return true;
+                if(old[n]!=v)
+                    return true;
+
+                old.erase(n);
+            }while(jsn_->next_child(v, &n));
+        }
+
+        return old.size() > 0;
+    }
     void sane_config_schm::end_setting(bool cancel)
     {
         if (in_setting_)
@@ -1401,7 +1467,7 @@ namespace gb
     {
         scheme_name_ = name ? name : "";
     }
-    void sane_config_schm::update(bool(__stdcall* is_float)(int, void*), void* param, const char* (__stdcall* t2n)(const char*), std::string* discard)
+    void sane_config_schm::update(bool(* is_float)(int, void*), void* param, const char* (* t2n)(const char*), std::string* discard)
     {
         if (!jsn_)
             return;
@@ -1541,7 +1607,7 @@ namespace gb
             return;
 
         cJSON* next = first->next;
-        std::string name(first->string ? "" : first->string),
+        std::string name(first->string ? first->string : ""),
                     cont("");
         CFGSCHM     sch;
 
@@ -1576,11 +1642,13 @@ namespace gb
         if (ret == 0)
             ret = load_mem(cont.c_str());
 
-        if (ret == 0 && scanner_name_.empty())
+        // if (ret == 0 && scanner_name_.empty())
         {
             const char* name = strrchr(file, PATH_SYMBOL[0]);
             if (name++ == nullptr)
                 name = file;
+            else
+                path_ = std::string(file, name - file);
 
             scanner_name_ = name;
             ret = scanner_name_.rfind('.');
@@ -1593,10 +1661,17 @@ namespace gb
     }
     int scanner_cfg::load_mem(const char* mem)
     {
-        cJSON* root = cJSON_Parse(mem);
+        base64  b64;
+        std::string text(b64.decode(mem, strlen(mem)));
+        cJSON* root = cJSON_Parse(text.c_str());
 
         if (!root)
+        {
+            FILE* dst = fopen((path_ + "err_cfg.txt").c_str(), "wb");
+            fwrite(text.c_str(), 1, text.length(), dst);
+            fclose(dst);
             return EINVAL;
+        }
 
         clear();
         walk_sibling_schemes(root->child);
@@ -1610,7 +1685,7 @@ namespace gb
             return EINVAL;
 
         std::string cont("{\"" + scanner_cfg::global_name_ + "\":"),
-                    f(file ? file : path_ + scanner_name_),
+                    f(file ? file : path_ + scanner_name_ + ".cfg"),
                     v("");
         int         sel = -1;
 
@@ -1650,7 +1725,7 @@ namespace gb
     {
         sane_config_schm* found = nullptr;
 
-        if (scheme_name)
+        if (scheme_name && *scheme_name)
         {
             std::vector<CFGSCHM>::iterator it = std::find(schemes_.begin(), schemes_.end(), scheme_name);
             if (it != schemes_.end())
@@ -1670,6 +1745,16 @@ namespace gb
 
         return found;
     }
+    std::string scanner_cfg::get_current_scheme_name(void)
+    {
+        int ind = -1;
+
+        global_->get_value(scanner_cfg::cur_sel_.c_str(), ind);
+        if (ind >= 0 && ind < schemes_.size())
+            return schemes_[ind].name;
+        else
+            return scanner_cfg::default_setting_name_;
+    }
     bool scanner_cfg::remove_scheme(const char* scheme_name)
     {
         std::vector<CFGSCHM>::iterator it = std::find(schemes_.begin(), schemes_.end(), scheme_name);
@@ -1692,9 +1777,16 @@ namespace gb
 
         return false;
     }
+    void scanner_cfg::remove_all_schemes(void)
+    {
+        for(auto& v: schemes_)
+            v.schm->release();
+
+        schemes_.clear();
+    }
     bool scanner_cfg::select_scheme(const char* scheme_name)
     {
-        std::vector<CFGSCHM>::iterator it = std::find(schemes_.begin(), schemes_.end(), scheme_name);
+        std::vector<CFGSCHM>::iterator it = scheme_name ? std::find(schemes_.begin(), schemes_.end(), scheme_name) : schemes_.end();
 
         if (it == schemes_.end())
             global_->set_value(scanner_cfg::cur_sel_.c_str(), -1);
@@ -1725,19 +1817,38 @@ namespace gb
     }
     bool scanner_cfg::add_scheme(sane_config_schm* schm, const char* name)
     {
-        if (name && std::find(schemes_.begin(), schemes_.end(), name) != schemes_.end())
+        CFGSCHM cs;
+
+        cs.name = name ? name : schm->get_scheme_name();
+        if(cs.name.empty() || cs.name == scanner_cfg::global_name_)
             return false;
 
-        CFGSCHM cs;
-        cs.name = name ? name : schm->get_scheme_name();
-        cs.schm = schm;
-        if (cs.name == scanner_cfg::global_name_)
+        if (std::find(schemes_.begin(), schemes_.end(), cs.name.c_str()) != schemes_.end())
             return false;
 
+        cs.schm = schm;
+
         schemes_.push_back(cs);
         schm->set_scheme_name(cs.name.c_str());
         schm->add_ref();
 
         return true;
     }
+    bool scanner_cfg::rename_scheme(const char* from, const char* to)
+    {
+        if (to && std::find(schemes_.begin(), schemes_.end(), to) != schemes_.end())
+            return false;
+
+        for(auto& v: schemes_)
+        {
+            if(v.name == from)
+            {
+                v.name = to;
+                v.schm->set_scheme_name(to);
+                return true;
+            }
+        }
+
+        return false;
+    }
 }
diff --git a/sane/gb_json.h b/sane/gb_json.h
index 35ffec5..75f7940 100644
--- a/sane/gb_json.h
+++ b/sane/gb_json.h
@@ -2,16 +2,21 @@
 
 #if defined(WIN32) || defined(_WIN64)
 #include <Windows.h>
+#include "../../code_device/hgsane/cJSON.h"
 #define PATH_SYMBOL "\\"
 #else
+#include "cJSON.h"
 #define PATH_SYMBOL "/"
+#define NULL        nullptr
+#define DWORD_PTR   char*
+#define _countof(a) sizeof(a) / sizeof(a[0])
 #endif
 
-// #include "cJSON.h"
-#include "../../code_device/hgsane/cJSON.h"
+// 
 #include <vector>
 #include <string>
 #include <map>
+#include <algorithm>
 
 namespace gb
 {
@@ -130,24 +135,28 @@ namespace gb
         static bool is_option_data(std::string& name);  // reset baase option name into 'name' if name was option data, and return true
 
     public:
+        sane_config_schm* copy(void);
         bool load_from_file(const char* file);
         bool load_from_mem(const char* mem, bool in_b64 = true);
         bool save_to(const char* file);
         void set_default_value(int sn, const char* name, const char* val, size_t bytes);
+        void copy_default_value(sane_config_schm* from);
         bool first_config(std::string& name, std::string& val);
         bool next_config(std::string& name, std::string& val);
+        bool get_config(const char* name, std::string& val);
         void begin_setting(bool restore = false);
         void config_changed(const char* name, const char* val, size_t bytes, bool extra = false);
         void config_changed(int sn, const char* val, size_t bytes, bool extra = false);
         void remove_config(const char* name);
         void set_value(const char* name, const char* val, size_t bytes, bool extra = false);
+        bool has_changed(void);
         void end_setting(bool cancel);
         int id_from_name(const char* name);
         std::string to_text_stream(bool b64 = true, bool with_ver = true);
         std::string get_version(void);
         std::string get_scheme_name(void);
         void set_scheme_name(const char* name);
-        void update(bool(__stdcall* is_float)(int, void*), void* param, const char*(__stdcall* t2n)(const char*), std::string* discard = NULL);
+        void update(bool(* is_float)(int, void*), void* param, const char*(* t2n)(const char*), std::string* discard = NULL);
     };
 
     class scanner_cfg : public refer
@@ -198,8 +207,8 @@ namespace gb
 
         typedef struct _update_func
         {
-            void(__stdcall* trans_number)(const char* name, std::string& val, void* param);
-            const char* (__stdcall* title2name)(const char* title, void* param);
+            void(* trans_number)(const char* name, std::string& val, void* param);
+            const char* (* title2name)(const char* title, void* param);
             std::string discard_msg;    // update failed items ...
             void* func_param;
         }UDF, *LPUDF;
@@ -212,10 +221,13 @@ namespace gb
 
         void get_all_schemes(std::vector<std::string>& schemes);    // return all schemes name queue, the first is always be 'Default settings'
         sane_config_schm* get_scheme(const char* scheme_name = nullptr/*return current scheme if was null*/);   // call sane_config_schm::release() if not use anymore
+        std::string get_current_scheme_name(void);
         bool remove_scheme(const char* scheme_name);
+        void remove_all_schemes(void);
         bool select_scheme(const char* scheme_name);
 
         sane_config_schm* copy_scheme(const char* cp_from_name);    // for UI setting, call release() if not use anymore
         bool add_scheme(sane_config_schm* schm, const char* name = nullptr);
+        bool rename_scheme(const char* from, const char* to);
     };
-}
+};
diff --git a/sane/scanner.cpp b/sane/scanner.cpp
index 447ea51..f3c856e 100644
--- a/sane/scanner.cpp
+++ b/sane/scanner.cpp
@@ -201,7 +201,7 @@ namespace callback
 					, {SANE_STD_OPT_NAME_IS_AUTO_FEED_STRENGTH , "\350\207\252\345\212\250\346\220\223\347\272\270\345\274\272\345\272\246"}																																															// 自动搓纸强度
 					,   {SANE_STD_OPT_NAME_FEED_STRENGTH_VALUE , "\346\220\223\347\272\270\351\230\210\345\200\274"}																																																					// "   搓纸阈值"
 	};
-	const char* __stdcall option_title_2_name(const char* title)
+	const char* option_title_2_name(const char* title)
 	{
 		while (*title == ' ')
 			title++;
@@ -492,7 +492,7 @@ void __stdcall scanner::ui_callback(int uev, void* sender, void* param)
 {
 	((scanner*)param)->on_ui_event(uev, sender);
 }
-bool __stdcall scanner::is_option_float(int sn, void* param)
+bool scanner::is_option_float(int sn, void* param)
 {
 	SANE_Option_Descriptor* desc = hg_sane_middleware::instance()->get_option_descriptor((SANE_Handle)param, sn);
 
diff --git a/sane/scanner.h b/sane/scanner.h
index 6ef08ca..999551e 100644
--- a/sane/scanner.h
+++ b/sane/scanner.h
@@ -184,7 +184,7 @@ class scanner : public ISaneInvoker, virtual public refer
 	static int __stdcall to_int(SANE_Int v);
 	static float __stdcall to_float(SANE_Fixed v);
 	static void __stdcall ui_callback(int uev, void* sender, void* param);
-	static bool __stdcall is_option_float(int sn, void* param);
+	static bool is_option_float(int sn, void* param);
 
 public:
 	scanner(SCANNERID id);
diff --git a/twain/twain/huagaods.cpp b/twain/twain/huagaods.cpp
index 7f7962c..133a280 100644
--- a/twain/twain/huagaods.cpp
+++ b/twain/twain/huagaods.cpp
@@ -1000,7 +1000,12 @@ Result huagao_ds::imageInfoGet(const Identity&, ImageInfo& data)
 		if (m_compression == Compression::Group4)
 			data.setPixelType(PixelType::BlackWhite);
 		else
-			data.setPixelType(head.format == SANE_FRAME_RGB ? PixelType::Rgb : PixelType::Gray);
+		{
+			if (head.format == SANE_FRAME_RGB)
+				data.setPixelType(PixelType::Rgb);
+			else if(head.format == SANE_FRAME_GRAY)
+				data.setPixelType(head.depth == 1 ? PixelType::BlackWhite : PixelType::Gray);
+		}
 		data.setPlanar(false);
 		data.setWidth(head.pixels_per_line);