diff --git a/huagao/Device/ImageMatQueue.cpp b/huagao/Device/ImageMatQueue.cpp
index 1b32cf48..23bd7fd5 100644
--- a/huagao/Device/ImageMatQueue.cpp
+++ b/huagao/Device/ImageMatQueue.cpp
@@ -269,7 +269,7 @@ void ImageMatQueue::setparam(const GScanCap& param)
 
 	if (scanParam.en_fold)
 	{
-		m_iaList.push_back(shared_ptr<CImageApply>(new CImageApplyConcatenation(CImageApplyConcatenation::horizontal)));
+		m_iaList.push_back(shared_ptr<CImageApply>(new CImageApplyConcatenation(CImageApplyConcatenation::horizontal,cv::Scalar(255,255,255))));
 	}
 
 	if (param.imageRotateDegree != 0.0 || param.is_backrotate180 || param.is_autotext)
@@ -325,10 +325,9 @@ bool ImageMatQueue::queuesempty()
 static int index = 0;
 void ImageMatQueue::proc()
 {
-	SYSTEM_INFO sys;
-	GetSystemInfo(&sys);
+	int dwnumber = std::thread::thread::hardware_concurrency();
 	std::unique_ptr<ThreadPool> m_threadpool;
-	m_threadpool.reset(new ThreadPool(sys.dwNumberOfProcessors < 4 ? 1 : sys.dwNumberOfProcessors / 2));
+	m_threadpool.reset(new ThreadPool(dwnumber < 4 ? 1 : dwnumber / 2));
 	while (bRun) {
 		while (m_imagedata.Size() > 0) {
 			this_thread::sleep_for(chrono::milliseconds(1));
@@ -351,10 +350,6 @@ void ImageMatQueue::proc()
 
 void ImageMatQueue::imageproceing(std::vector<std::shared_ptr<std::vector<char>>>& buffs)
 {
-	//std::ostringstream oss;
-	//oss << std::this_thread::get_id();
-	//std::string stid = oss.str();
-	//writelog(stid);
 	vector<cv::Mat> mats;
 	for (auto& buf : buffs) {
 		ImreadModes rmc;
@@ -421,7 +416,10 @@ void ImageMatQueue::imageproceing(std::vector<std::shared_ptr<std::vector<char>>
 	//FileTools::write_log("1.txt", " dogear time " + to_string(sw.elapsed_ms()));
 	if (scanParam.is_switchfrontback)
 		swap(mats[0], mats[1]);
-
+	if (scanParam.en_fold != 0) {
+		cv::flip(mats[0], mats[0], 1);
+		cv::flip(mats[0], mats[0], 0);
+	}
 	for (int j = 0; j < m_iaList.size(); j++) {
 		m_iaList[j]->apply(mats, scanParam.is_duplex);
 	}
diff --git a/huagao/ImageProcess/ImageApplyConcatenation.cpp b/huagao/ImageProcess/ImageApplyConcatenation.cpp
index d7d0b9ed..f2200469 100644
--- a/huagao/ImageProcess/ImageApplyConcatenation.cpp
+++ b/huagao/ImageProcess/ImageApplyConcatenation.cpp
@@ -2,7 +2,7 @@
 
 CImageApplyConcatenation::CImageApplyConcatenation()
     : m_direction(autoDirection)
-    , m_BG_color(0, 0, 0)
+    , m_BG_color(255, 255, 255)
 {
 }
 
diff --git a/huagao/huagaods.cpp b/huagao/huagaods.cpp
index 14d20995..238f5c99 100644
--- a/huagao/huagaods.cpp
+++ b/huagao/huagaods.cpp
@@ -44,6 +44,7 @@ enum class CapTypeEx : unsigned short {
 	TwEx_Sharpen = 0x8022,
 	TwEx_DBAreaNum = 0x8027,
 	TwEx_DBDevnMax = 0x8028,
+	TwEx_EnFold=0x8037,
 	TwEx_StableDetectEnable = 0x8090,
 	TwEx_UVModel = 0x8093,
 	TwEx_SwitchFrontBack = 0x8094,
@@ -77,7 +78,7 @@ using namespace std::placeholders;
 TWPP_ENTRY_MFC(HuagaoDs)
 
 static constexpr const Identity srcIdent(
-	Version(3, 3, Language::English, Country::China, "v3.3.4.2"),
+	Version(3, 3, Language::English, Country::China, "v3.3.4.3"),
 	DataGroup::Image,
 #ifdef MAKEHUAGAO
 	"HUAGO",
@@ -717,7 +718,6 @@ Result HuagaoDs::identityOpenDs(const Identity&) {
 			}
 		}
 	}
-
 	m_haveError = false;
 	updataGscanCap();
 	bmpData->resize(sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER));
@@ -1258,11 +1258,26 @@ Result HuagaoDs::identityOpenDs(const Identity&) {
 		return CapSupGetAllReset<Bool, Bool, CapType::IAutomaticBorderDetection>(msg, data, { false,true }, m_autoboarderdetcet, false, m_autoboarderdetcet ? 1 : 0, 0);
 	};
 
-	m_query[CapType::IImageMerge] = msgSupportGetAllSetReset;
-	m_caps[CapType::IImageMerge] = [this](Msg msg, Capability& data)->Result {
+	//m_query[CapType::IImageMerge] = msgSupportGetAllSetReset;
+	//m_caps[CapType::IImageMerge] = [this](Msg msg, Capability& data)->Result {
+	//	if (Msg::Set == msg) {
+	//		auto autocrop = data.currentItem<CapType::IImageMerge>();
+	//		m_scanparam->en_fold = (byte)autocrop;
+	//		if ((UInt16)autocrop != 0){
+	//			m_scanparam->is_duplex = 1;
+	//			m_scanparam->autodescrew = 1;//合并可用时 默认自动纠偏
+	//			m_scanparam->is_autodiscradblank_normal = m_scanparam->is_autodiscradblank_vince = 0;
+	//		}
+	//		return success();
+	//	}
+	//	return CapSupGetAllResetEx<byte, UInt16, CapType::IImageMerge>(msg, data, m_scanparam->en_fold, 0);
+	//};
+
+	m_query[CapType(CapTypeEx::TwEx_EnFold)] = msgSupportGetAllSetReset;
+	m_caps[CapType(CapTypeEx::TwEx_EnFold)] = [this](Msg msg, Capability& data)->Result {
 		if (Msg::Set == msg) {
-			auto autocrop = data.currentItem<CapType::IImageMerge>();
-			m_scanparam->en_fold = (byte)autocrop;
+			auto autocrop = data.currentItem<Int32>();
+			m_scanparam->en_fold = (Int32)autocrop;
 			if ((UInt16)autocrop != 0){
 				m_scanparam->is_duplex = 1;
 				m_scanparam->autodescrew = 1;//合并可用时 默认自动纠偏
@@ -1270,7 +1285,7 @@ Result HuagaoDs::identityOpenDs(const Identity&) {
 			}
 			return success();
 		}
-		return CapSupGetAllResetEx<byte, UInt16, CapType::IImageMerge>(msg, data, m_scanparam->en_fold, 0);
+		return CapSupGetAllResetEx<byte, Int32, (CapType)CapTypeEx::TwEx_EnFold>(msg, data, { 0,1 }, m_scanparam->en_fold, 0,m_scanparam->en_fold ? 1 : 0, 0);
 	};
 
 	m_query[CapType::IAutoDiscardBlankPages] = msgSupportGetAllSetReset;
diff --git a/huagao/stdafx.h b/huagao/stdafx.h
index 7fd25499..81273706 100644
Binary files a/huagao/stdafx.h and b/huagao/stdafx.h differ