diff --git a/app/scanner/mainwindow.cpp b/app/scanner/mainwindow.cpp
index ce3eea81..c3596593 100644
--- a/app/scanner/mainwindow.cpp
+++ b/app/scanner/mainwindow.cpp
@@ -47,6 +47,7 @@ MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
     , ui(new Ui::MainWindow)
     , m_admin_loggedIn(false)
+    , m_dpi(200)
     , m_currFilePath("")
     , m_currIndex(-1)
     , m_multiPageCount(0)
@@ -728,28 +729,7 @@ void MainWindow::on_sane_dev_error(QString errorInfo)
 void MainWindow::on_new_image(void *img)
 {
     HGImage image = (HGImage)img;
-
-    HGUInt dpi = 96;
-    SANE_Int num_dev_options = 0;
-    sane_control_option(cur_dev_.handle(), 0, SANE_ACTION_GET_VALUE, &num_dev_options, nullptr);
-    for (int i = 1; i < num_dev_options; ++i)
-    {
-        const SANE_Option_Descriptor* desp = sane_get_option_descriptor(cur_dev_.handle(), i);
-        if (nullptr == desp)
-            continue;
-
-        if (SANE_TYPE_INT == desp->type)
-        {
-            SANE_Int value = 0;
-            sane_control_option(cur_dev_.handle(), i, SANE_ACTION_GET_VALUE, &value, nullptr);
-            if (0 == strcmp(desp->title, OPTION_TITLE_FBL))
-            {
-                dpi = (HGUInt)value;
-            }
-        }
-    }
-
-    HGBase_SetImageDpi(image, dpi, dpi);
+    HGBase_SetImageDpi(image, m_dpi, m_dpi);
 
     if (1 == m_scanType)
     {
@@ -962,6 +942,8 @@ void MainWindow::on_continueScan()
     startSaveMessageBox(m_dialogLog);
 
     SANE_Status ret;
+
+    m_dpi = getDpi();
     if (m_singleScan)
         ret = sane_io_control(cur_dev_.handle(), IO_CTRL_CODE_TEST_SINGLE, nullptr, nullptr);
     else
@@ -1064,6 +1046,31 @@ void MainWindow::on_act_last_triggered()
     }
 }
 
+HGUInt MainWindow::getDpi()
+{
+    HGUInt dpi = 200;
+    SANE_Int num_dev_options = 0;
+    sane_control_option(cur_dev_.handle(), 0, SANE_ACTION_GET_VALUE, &num_dev_options, nullptr);
+    for (int i = 1; i < num_dev_options; ++i)
+    {
+        const SANE_Option_Descriptor* desp = sane_get_option_descriptor(cur_dev_.handle(), i);
+        if (nullptr == desp)
+            continue;
+
+        if (SANE_TYPE_INT == desp->type)
+        {
+            SANE_Int value = 0;
+            sane_control_option(cur_dev_.handle(), i, SANE_ACTION_GET_VALUE, &value, nullptr);
+            if (0 == strcmp(desp->title, OPTION_TITLE_FBL))
+            {
+                dpi = (HGUInt)value;
+            }
+        }
+    }
+
+    return dpi;
+}
+
 QString MainWindow::getCacheFileName()
 {
     QString cachePath = Dialog_ClrCache::getCachePath();
@@ -2448,6 +2455,7 @@ void MainWindow::on_act_acquire_triggered()
 
     startSaveMessageBox(this);
 
+    m_dpi = getDpi();
     SANE_Status ret = sane_start(cur_dev_.handle());
     if (ret != SANE_STATUS_GOOD)
     {
@@ -2495,6 +2503,7 @@ void MainWindow::on_act_acquireSingle_triggered()
 
     startSaveMessageBox(this);
 
+    m_dpi = getDpi();
     SANE_Status ret = sane_io_control(cur_dev_.handle(), IO_CTRL_CODE_TEST_SINGLE, nullptr, nullptr);
     if (ret != SANE_STATUS_GOOD)
     {
@@ -2557,6 +2566,7 @@ void MainWindow::on_act_acquireInto_triggered()
 
         startSaveMessageBox(this);
 
+        m_dpi = getDpi();
         SANE_Status ret = sane_start(cur_dev_.handle());
         if (ret != SANE_STATUS_GOOD)
         {
@@ -2619,6 +2629,7 @@ void MainWindow::on_act_insertFromScanner_triggered()
 
         startSaveMessageBox(this);
 
+        m_dpi = getDpi();
         SANE_Status ret = sane_start(cur_dev_.handle());
         if (ret != SANE_STATUS_GOOD)
         {
diff --git a/app/scanner/mainwindow.h b/app/scanner/mainwindow.h
index d7fdd8f9..b9d71b30 100644
--- a/app/scanner/mainwindow.h
+++ b/app/scanner/mainwindow.h
@@ -205,6 +205,7 @@ protected:
 private:
     static int sane_ex_callback(SANE_Handle hdev, int code, void *data, unsigned int* len, void *param);
 
+    HGUInt getDpi();
     QString getCacheFileName();
     HGImage createImage();
     int getMultiPageCount();
@@ -230,6 +231,7 @@ private:
     sane_dev            cur_dev_;
     std::vector<DEVCFG> dev_schemes_;
 
+    HGUInt m_dpi;
     QString m_currFilePath;
     int m_currIndex;
     int m_multiPageCount;