diff --git a/resource/tasks.json b/resource/tasks.json
index 5a7fbe1505..93ca6bd26e 100644
--- a/resource/tasks.json
+++ b/resource/tasks.json
@@ -6505,7 +6505,7 @@
         "roi": [
             62,
             89,
-            45,
+            43,
             23
         ],
         "maskRange": [
diff --git a/src/MeoAssistant/Controller.cpp b/src/MeoAssistant/Controller.cpp
index 98cb3fd72e..9ab6a6249f 100644
--- a/src/MeoAssistant/Controller.cpp
+++ b/src/MeoAssistant/Controller.cpp
@@ -368,7 +368,7 @@ void asst::Controller::clear_info() noexcept
     m_width = 0;
     m_height = 0;
     m_control_scale = 1.0;
-    m_scale_size = decltype(m_scale_size)();
+    m_scale_size = { WindowWidthDefault, WindowHeightDefault };
 }
 
 int asst::Controller::push_cmd(const std::string& cmd)
@@ -395,7 +395,7 @@ bool asst::Controller::screencap()
 
     //if (true) {
     //    std::unique_lock<std::shared_mutex> image_lock(m_image_mutex);
-    //    m_cache_image = cv::imread("err.png");
+    //    m_cache_image = cv::imread("err/1.png");
     //    return true;
     //}
 
diff --git a/src/MeoAssistant/Controller.h b/src/MeoAssistant/Controller.h
index b446379ec9..47e2d117bb 100644
--- a/src/MeoAssistant/Controller.h
+++ b/src/MeoAssistant/Controller.h
@@ -127,7 +127,7 @@ namespace asst
         } m_adb;
 
         std::string m_uuid;
-        std::pair<int, int> m_scale_size;
+        std::pair<int, int> m_scale_size = { WindowWidthDefault, WindowHeightDefault };
         double m_control_scale = 1.0;
         int m_width = 0;
         int m_height = 0;
diff --git a/src/MeoAssistant/StageDropsImageAnalyzer.cpp b/src/MeoAssistant/StageDropsImageAnalyzer.cpp
index 473e7a767a..5e20ae6172 100644
--- a/src/MeoAssistant/StageDropsImageAnalyzer.cpp
+++ b/src/MeoAssistant/StageDropsImageAnalyzer.cpp
@@ -233,7 +233,7 @@ bool asst::StageDropsImageAnalyzer::analyze_baseline()
     cv::inRange(gray, task_ptr->mask_range.first, task_ptr->mask_range.second, bin);
 
     cv::Rect bounding_rect = cv::boundingRect(bin);
-    cv::Mat bounding = bin(bounding_rect);
+    cv::Mat bounding = gray(bounding_rect);
 
     int x_offset = task_ptr->roi.x + bounding_rect.x;
     int y_offset = task_ptr->roi.y + bounding_rect.y;
@@ -246,8 +246,12 @@ bool asst::StageDropsImageAnalyzer::analyze_baseline()
     int spacing = 0;
 
     // split
+    int threshold = task_ptr->mask_range.first;
+    uchar pre_value = 0;
     for (int i = 0; i < bounding.cols; ++i) {
-        bool is_white = bounding.at<uchar>(0, i);
+        uchar value = bounding.at<uchar>(0, i);
+        bool is_white = value > threshold && pre_value - value < threshold;
+        pre_value = value;
 
         if (in && !is_white) {
             in = false;