diff --git a/docs/sane-opts/image_encoder.txt b/docs/sane-opts/image_encoder.txt
new file mode 100644
index 0000000..21d4bff
--- /dev/null
+++ b/docs/sane-opts/image_encoder.txt
@@ -0,0 +1,41 @@
+{
+	"img-fmt": {
+		"cat": "imgp",
+		"group": "output",
+		"title": "图片格式",
+		"desc": "设备输出的图片文件格式",
+		"type": "string",
+		"ver": 1,
+		"pos": 9900,
+		"ui-pos": 10,
+		"auth": 0,
+		"visible": 0,
+		"size": 16,
+		"cur": "JPEG",
+		"default": "JPEG",
+		"range": ["JPEG", "PNG", "BMP"]
+	},
+	"jpeg-quality": {
+		"cat": "imgp",
+		"group": "output",
+		"title": "JPEG质量",
+		"desc": "设置JPEG压缩质量，质量越高，压缩率越低",
+		"type": "int",
+		"ver": 1,
+		"pos": 9901,
+		"ui-pos": 11,
+		"auth": 0,
+		"affect": 4,
+		"unit": "%",
+		"visible": 0,
+		"size": 4,
+		"cur": 100,
+		"default": 100,
+		"range": {
+			"min": 10,
+			"max": 100,
+			"step": 1
+		},
+		"depend": "img-fmt==JPEG"
+	}
+}
\ No newline at end of file
diff --git a/hardware/hardware.cpp b/hardware/hardware.cpp
index f601b8d..fcd0a72 100644
--- a/hardware/hardware.cpp
+++ b/hardware/hardware.cpp
@@ -383,13 +383,13 @@ void scanner_hw::thread_image_capture(bool paper_ready)
     devui::send_message(devui::UI_STATUS_SCANNING, (uint8_t*)&scanstream, sizeof(scanstream));
     while(scanning_)    // auto scan cycle ...
     {
-        err = start_and_wait_lifter(to_lifter_, &over_msg_id);
-        if(err)
-            break;
-        
         // scanning ONE turn ...
         if(paper_ready) // auto_scan_ ignore no paper
         {
+            err = start_and_wait_lifter(to_lifter_, &over_msg_id);
+            if(err)
+                break;
+        
             motor_->pick_paper();
             err = scan_one_turn(&img, &avail_mem, &used_v4l2_mem, &over_msg_id);
             if(err || !auto_scan_ || !scanning_)
diff --git a/imgproc/algs/image_encoder.cpp b/imgproc/algs/image_encoder.cpp
new file mode 100644
index 0000000..a918bde
--- /dev/null
+++ b/imgproc/algs/image_encoder.cpp
@@ -0,0 +1,110 @@
+#include "image_encoder.h"
+
+#include <huagao/hgscanner_error.h>
+#include <sane/sane_ex.h>
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// img_encoder
+static std::string device_opt_json[] = {
+	"{\"img-fmt\":{\"cat\":\"imgp\",\"group\":\"output\",\"title\":\"\\u56fe\\u7247\\u683c\\u5f0f\",\"desc\":\"\\u8bbe\\u5907\\u8f93\\u51fa\\u7684\\u56fe\\u7247\\u6587\\u4ef6\\u683c\\u5f0f\",\"type\":\"string\",\"ver\":1,\"pos\":9900,\"ui-pos\":10,\"auth\":0,\"visible\":0,\"size\":16,\"cur\":\"JPEG\",\"default\":\"JPEG\",\"range\":[\"JPEG\",\"PNG\",\"BMP\"]},\"jpeg-quality\":{\"cat\":\"imgp\",\"group\":\"output\",\"title\":\"JPEG\\u8d28\\u91cf\",\"desc\":\"\\u8bbe\\u7f6eJPEG\\u538b\\u7f29\\u8d28\\u91cf\\uff0c\\u8d28\\u91cf\\u8d8a\\u9ad8\\uff0c\\u538b\\u7f29\\u7387\\u8d8a\\u4f4e\",\"type\":\"int\",\"ver\":1,\"pos\":9901,\"ui-pos\":11,\"auth\":0,\"affect\":4,\"unit\":\"%\",\"visible\":0,\"size\":4,\"cur\":100,\"default\":100,\"range\":{\"min\":10,\"max\":100,\"step\":1},\"depend\":\"img-fmt==JPEG\"}}"
+};
+
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// img_encoder
+img_encoder::img_encoder() : image_processor("img_encoder")
+{
+    ADD_THIS_JSON();
+    // if (!bwimg)
+    // {
+    //     compression_params.push_back(cv::IMWRITE_JPEG_QUALITY);
+    //     compression_params.push_back(100);
+    // }
+    // else{
+    //     compression_params.push_back(CV_IMWRITE_PNG_STRATEGY);
+    //     compression_params.push_back(cv::IMWRITE_PNG_STRATEGY_FIXED);
+    // }
+    param_.push_back(cv::IMWRITE_JPEG_QUALITY);
+    param_.push_back(jpeg_quality_);
+}
+img_encoder::~img_encoder()
+{}
+
+int img_encoder::set_value(const char* name, void* val)
+{
+    int ret = SCANNER_ERR_OK;
+
+    if(strcmp(name, SANE_OPT_NAME(OUT_FORMAT)) == 0)
+    {
+        fmt_ = (char*)val;
+        if(fmt_ == "JPEG")
+        {
+            fmt_ = ".jpg";
+
+            param_.clear();
+            param_.push_back(cv::IMWRITE_JPEG_QUALITY);
+            param_.push_back(jpeg_quality_);
+        }
+        else if(fmt_ == "PNG")
+        {
+            fmt_ = ".png";
+
+            param_.clear();
+            param_.push_back(CV_IMWRITE_PNG_STRATEGY);
+            param_.push_back(cv::IMWRITE_PNG_STRATEGY_FIXED);
+        }
+        else
+        {
+            fmt_ = ".bmp";
+            param_.clear();
+        }
+    }
+    else if(strcmp(name, SANE_OPT_NAME(JPEG_QUALITY)) == 0)
+    {
+        jpeg_quality_ = *(int*)val;
+    }
+    else
+    {
+        ret = SCANNER_ERR_DEVICE_NOT_SUPPORT;
+    }
+
+    return ret;
+}
+int img_encoder::process(std::vector<PROCIMGINFO>& in, std::vector<PROCIMGINFO>& out)
+{
+    for(auto& v: in)
+    {
+        v.info.prc_stage = get_position();
+        v.info.prc_time = 0;
+
+        out.push_back(v);
+    }
+
+    return SCANNER_ERR_OK;
+}
+
+std::shared_ptr<std::vector<uchar>> img_encoder::encode(LPPACKIMAGE head, cv::Mat& mat)
+{
+    std::shared_ptr<std::vector<uchar>> ptr;
+    chronograph watch;
+
+    head->prc_stage = get_position();
+    if(fmt_ == ".bmp")
+    {
+        size_t  size = mat.total() * mat.channels();
+        ptr.reset(new std::vector<uchar>(size));
+        memcpy(ptr->data(), mat.data, size);
+        head->prc_time = watch.elapse_ms();
+        head->format = IMG_FMT_BMP;
+    }
+    else
+    {
+        ptr.reset(new std::vector<uchar>());
+        head->format = fmt_ == ".jpg" ? IMG_FMT_JPEG : IMG_FMT_PNG;
+        cv::imencode(fmt_.c_str(), mat, *ptr, param_);
+        head->prc_time = watch.elapse_ms();
+        printf("encode to '%s' in %ums: %u\n", fmt_.c_str(), head->prc_time, ptr->size());
+    }
+
+    return ptr;
+}
\ No newline at end of file
diff --git a/imgproc/algs/image_encoder.h b/imgproc/algs/image_encoder.h
new file mode 100644
index 0000000..ae0f024
--- /dev/null
+++ b/imgproc/algs/image_encoder.h
@@ -0,0 +1,30 @@
+// encoder bmp to given format
+//
+// Date:    2024-02-26
+#pragma once
+
+#include <imgprc/img_processor.h>
+#include <memory>
+#include <vector>
+
+class img_encoder : public image_processor
+{
+    std::string         fmt_ = ".jpg";
+    int                 jpeg_quality_ = 100;
+    std::vector<int>    param_;
+
+public:
+    img_encoder();
+
+protected:
+    ~img_encoder();
+
+public:
+	virtual int set_value(const char* name/*nullptr for all options*/, void* val/*nullptr for restore*/) override;
+
+public:
+	virtual int process(std::vector<PROCIMGINFO>& in, std::vector<PROCIMGINFO>& out) override;
+
+public:
+    std::shared_ptr<std::vector<uchar>> encode(LPPACKIMAGE head, cv::Mat& mat);
+};
diff --git a/imgproc/imgprc_mgr.cpp b/imgproc/imgprc_mgr.cpp
index 90ff4df..ade1a0e 100644
--- a/imgproc/imgprc_mgr.cpp
+++ b/imgproc/imgprc_mgr.cpp
@@ -10,6 +10,7 @@
 #include "./algs/auto_crop.h"
 #include "./algs/color_correct.h"
 #include "./algs/ImageProcess_Public.h"
+#include "./algs/image_encoder.h"
 
 
 
@@ -54,7 +55,11 @@ imgproc_mgr::imgproc_mgr(std::function<void(data_source_ptr)> sender
 	else
 		opts_ = new device_option(true);
 	load_processor(nullptr);
-	rebuild_.reset(new rebuild());
+	first_.reset(new rebuild());
+	last_.reset(new img_encoder());
+
+	opts_->add(first_.get());
+	opts_->add(last_.get());
 
 	auto thrd = [&](void) -> void
 	{
@@ -96,12 +101,6 @@ data_source_ptr imgproc_mgr::scan_finished_packet(uint32_t scanid, uint32_t err)
 
 	return reply;
 }
-image_packet_ptr imgproc_mgr::image_sent_packet(LPPACKIMAGE head, dyn_mem_ptr img, uint32_t scanid, void* info, size_t info_l)
-{
-	image_packet_ptr	pimg = new image_packet(head, img, scanid, info, info_l);
-
-	return pimg;
-}
 
 uint32_t imgproc_mgr::add_busy_worker(int inc)
 {
@@ -148,7 +147,7 @@ void imgproc_mgr::process(RAWIMG* img)
 
 		if(do_rebuild_)
 		{
-			rebuild_->do_rebuild(&img->info, img->data->ptr(), in);
+			first_->do_rebuild(&img->info, img->data->ptr(), in);
 			utils::to_log(LOG_LEVEL_ALL, "Rebuild paper %d spend %llu milliseconds.\n", img->info.pos.paper_ind, watch.elapse_ms());
 		}
 		else
@@ -161,12 +160,15 @@ void imgproc_mgr::process(RAWIMG* img)
 
 		if(dump_img_)
 		{
-			send_image(&img->info, img->data->ptr(), img->info.width * img->info.height);
+			{
+				cv::Mat mat(img->info.width, img->info.height, CV_8UC1, img->data->ptr());
+				send_image(&img->info, mat);
+			}
 			img->data->release();
 			
 			for(auto& v: processors_)
 			{
-				send_image(*src, false);				
+				send_image(*src);				
 				if(v->is_enable())
 				{
 					process(v, src, dst);
@@ -196,7 +198,7 @@ void imgproc_mgr::process(RAWIMG* img)
 				v.info.prc_time = t;
 		}
 		
-		send_image(*src, true);
+		send_image(*src);
 	}
 	else
 	{
@@ -234,7 +236,7 @@ void imgproc_mgr::process(image_processor* prc, std::vector<PROCIMGINFO>* in, st
 		throw(exception_ex(msg.c_str()));
 	}
 }
-void imgproc_mgr::send_image(LPPACKIMAGE head, uint8_t* data, size_t size, void* info, size_t info_l)
+void imgproc_mgr::send_image(LPPACKIMAGE head, cv::Mat& mat, void* info, size_t info_l)
 {
 	auto ovr = [&](uint64_t total, uint64_t cur_size, uint32_t err, void* user_data) -> int
 	{
@@ -244,31 +246,18 @@ void imgproc_mgr::send_image(LPPACKIMAGE head, uint8_t* data, size_t size, void*
 		return 0;
 	};
 
-	dyn_mem_ptr	mem(dyn_mem::memory(size));
-	image_packet_ptr ptr = nullptr;
-
-	// mem->set_progress_notify(ovr, mem);
-	mem->put(data, size);
-	ptr = imgproc_mgr::image_sent_packet(head, mem, scan_id_, info, info_l);
-	// ptr->set_progress_notify(ovr, ptr);
-	// printf("+dyn_mem(%p)\n+image_packet(%p)\n", mem, ptr);
-
-	mem->release();
+	PACKIMAGE	h(*head);
+	std::shared_ptr<std::vector<uchar>> compd(last_->encode(&h, mat));	
+	image_packet_ptr ptr = new image_packet(&h, compd, scan_id_, info, info_l);
+	
 	ptr->set_session_id(session_id_);
 	img_sender_(ptr);
 	ptr->release();
 }
-void imgproc_mgr::send_image(std::vector<PROCIMGINFO>& imgs, bool clear_after_send)
+void imgproc_mgr::send_image(std::vector<PROCIMGINFO>& imgs)
 {
 	for(auto& v: imgs)
-	{
-		if(clear_after_send)
-			v.info.prc_stage = -1;
-		send_image(&v.info, v.img.ptr(), v.img.total() * v.img.channels()
-					, v.ext_info.empty() ? nullptr : &v.ext_info[0], v.ext_info.length());
-		// if(clear_after_send)
-		// 	v.img.release();
-	}
+		send_image(&v.info, v.img, v.ext_info.empty() ? nullptr : &v.ext_info[0], v.ext_info.length());
 }
 
 int imgproc_mgr::set_value(const char* name, void* val)
@@ -317,6 +306,7 @@ int imgproc_mgr::load_processor(const char* path)
 	ADD_IMG_PROCESSOR(stretch);
 	ADD_IMG_PROCESSOR(auto_crop);
 	ADD_IMG_PROCESSOR(color_correct);
+	// ADD_IMG_PROCESSOR(img_encoder);
 
 	std::sort(processors_.begin(), processors_.end(), &imgproc_mgr::sort_processor_by_pos);
 
diff --git a/imgproc/imgprc_mgr.h b/imgproc/imgprc_mgr.h
index e88136d..f7be708 100644
--- a/imgproc/imgprc_mgr.h
+++ b/imgproc/imgprc_mgr.h
@@ -17,6 +17,7 @@ typedef std::shared_ptr<std::vector<char>>	dcptr;
 
 class device_option;
 class rebuild;
+class img_encoder;
 
 class imgproc_mgr : public sane_opt_provider
 {
@@ -27,7 +28,8 @@ class imgproc_mgr : public sane_opt_provider
 		bool 		img;
 	}RAWIMG;
 
-	refer_guard<rebuild>			rebuild_;
+	refer_guard<rebuild>			first_;
+	refer_guard<img_encoder>		last_;
 	image_processor*				stretcher_ = nullptr;
 	bool							do_rebuild_ = true;
 	volatile bool					run_ = true;
@@ -48,14 +50,13 @@ class imgproc_mgr : public sane_opt_provider
 	static bool sort_processor_by_pos(image_processor* l, image_processor* r);
 	static bool sort_image_packet(image_packet_ptr l, image_packet_ptr r);
 	static data_source_ptr scan_finished_packet(uint32_t scanid, uint32_t err = 0);
-	static image_packet_ptr image_sent_packet(LPPACKIMAGE head, dyn_mem_ptr img, uint32_t scanid, void* info = nullptr, size_t info_l = 0);
 
 	uint32_t add_busy_worker(int inc = 1);
 	void thread_worker(void);
 	void process(RAWIMG* img);
 	void process(image_processor* prc, std::vector<PROCIMGINFO>* in, std::vector<PROCIMGINFO>* out);
-	void send_image(LPPACKIMAGE head, uint8_t* data, size_t size, void* info = nullptr, size_t info_l = 0);
-	void send_image(std::vector<PROCIMGINFO>& imgs, bool clear_after_send);
+	void send_image(LPPACKIMAGE head, cv::Mat& mat, void* info = nullptr, size_t info_l = 0);
+	void send_image(std::vector<PROCIMGINFO>& imgs);
 
 public:
 	imgproc_mgr(std::function<void(data_source_ptr)> sender, device_option* devopts, CHK_RES_FUNC res = CHK_RES_FUNC());
diff --git a/sdk/base/data.cpp b/sdk/base/data.cpp
index 4536153..cc7395e 100644
--- a/sdk/base/data.cpp
+++ b/sdk/base/data.cpp
@@ -928,7 +928,8 @@ uint8_t* file_map::buffer(void)
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // image_packet
-image_packet::image_packet(LPPACKIMAGE head, dyn_mem_ptr img, uint32_t scanid
+image_packet::image_packet(LPPACKIMAGE head, std::shared_ptr<std::vector<uchar>> img
+						, uint32_t scanid
 						, const void* info, size_t info_size)
 						 : img_(img), offset_(0), info_over_(false)
 {
@@ -936,7 +937,6 @@ image_packet::image_packet(LPPACKIMAGE head, dyn_mem_ptr img, uint32_t scanid
 	LPPACKIMAGE	pimg = nullptr;
 
 	paper_ind_ = head->pos.paper_ind;
-	img->add_ref();
 	if(info && info_size)
 		info_ = std::string((const char*)info, info_size);
 	else
@@ -949,7 +949,7 @@ image_packet::image_packet(LPPACKIMAGE head, dyn_mem_ptr img, uint32_t scanid
 	pack->payload_len = sizeof(PACKIMAGE);
 
 	memcpy(pimg, head, sizeof(*pimg));
-	pimg->data_size = img->get_rest();
+	pimg->data_size = img->size();
 	pimg->info_size = info_size;
 
 	head_->set_len(sizeof(PACK_BASE) + sizeof(PACKIMAGE));
@@ -970,7 +970,6 @@ image_packet::image_packet(LPPACKIMAGE head, dyn_mem_ptr img, uint32_t scanid
 image_packet::~image_packet()
 {
 	head_->release();
-	img_->release();
 }
 
 bool image_packet::is_memory_block(void)
@@ -979,7 +978,7 @@ bool image_packet::is_memory_block(void)
 }
 uint32_t image_packet::get_rest(void)
 {
-	return head_->get_rest() + info_.length() + img_->get_rest() - offset_;
+	return head_->get_rest() + info_.length() + img_->size() - offset_;
 }
 
 // following API valid when is_memory_block() return true
@@ -1023,15 +1022,15 @@ int image_packet::fetch_data(void* buf, uint32_t* size)
 	}
 	else
 	{
-		if(*size + offset_ >= img_->get_rest())
+		if(*size + offset_ >= img_->size())
 		{
-			memcpy(buf, img_->ptr() + offset_, img_->get_rest() - offset_);
-			*size = img_->get_rest() - offset_;
-			offset_ = img_->get_rest();
+			memcpy(buf, img_->data() + offset_, img_->size() - offset_);
+			*size = img_->size() - offset_;
+			offset_ = img_->size();
 		}
 		else
 		{
-			memcpy(buf, img_->ptr() + offset_, *size);
+			memcpy(buf, img_->data() + offset_, *size);
 			offset_ += *size;
 		}
 	}
diff --git a/sdk/base/data.h b/sdk/base/data.h
index deb1471..f880a5b 100644
--- a/sdk/base/data.h
+++ b/sdk/base/data.h
@@ -11,6 +11,9 @@
 #include <functional>
 
 #define CLS_PTR(cls)    typedef cls* cls##_ptr;
+#ifndef uchar
+typedef unsigned char   uchar;
+#endif
 
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -309,7 +312,8 @@ public:
 
 class image_packet : public data_source
 {
-	dyn_mem*	img_;
+	// dyn_mem*	img_;
+    std::shared_ptr<std::vector<uchar>> img_;
 	dyn_mem*	head_;
 	uint32_t	offset_;
     uint32_t    paper_ind_ = 0;
@@ -318,7 +322,7 @@ class image_packet : public data_source
 	std::string	pos_str_;
 
 public:
-	image_packet(LPPACKIMAGE head, dyn_mem* img, uint32_t scanid, const void* info = nullptr, size_t info_size = 0);
+	image_packet(LPPACKIMAGE head, std::shared_ptr<std::vector<uchar>> img, uint32_t scanid, const void* info = nullptr, size_t info_size = 0);
 
 protected:
 	virtual ~image_packet();
diff --git a/sdk/base/plat_types.h b/sdk/base/plat_types.h
index db12144..dde7936 100644
--- a/sdk/base/plat_types.h
+++ b/sdk/base/plat_types.h
@@ -185,6 +185,9 @@ extern uint64_t GetCurrentThreadId(void);
 #define pid_t	                int
 #define pthread_t               HANDLE
 
+#define _GLIBCXX_TXN_SAFE_DYN 
+#define _GLIBCXX_USE_NOEXCEPT
+
 #endif
 
 
diff --git a/sdk/base/utils.h b/sdk/base/utils.h
index 163f05f..0565f5e 100644
--- a/sdk/base/utils.h
+++ b/sdk/base/utils.h
@@ -298,6 +298,10 @@ public:
 	{
 		return obj_;
 	}
+	T* get(void)
+	{
+		return obj_;
+	}
 };
 
 // time utility
diff --git a/sdk/sane/sane_name.h b/sdk/sane/sane_name.h
index 797bd2d..b096cca 100644
--- a/sdk/sane/sane_name.h
+++ b/sdk/sane/sane_name.h
@@ -187,6 +187,9 @@
 #define SANE_STD_OPT_NAME_LUT_FILE              "lut-file"
 #define SANE_STD_OPT_NAME_PHASE_FRONT           "phase-f"
 #define SANE_STD_OPT_NAME_PHASE_BACK            "phase-b"
+#define SANE_STD_OPT_NAME_OUT_FORMAT            "img-fmt"
+#define SANE_STD_OPT_NAME_JPEG_QUALITY          "jpeg-quality"
+