2 files changed, 11 insertions, 5 deletions
diff --git a/tracker-pt/module/point_extractor.cpp b/tracker-pt/module/point_extractor.cpp
index 5e57ef34..2f84bf86 100644
--- a/tracker-pt/module/point_extractor.cpp
+++ b/tracker-pt/module/point_extractor.cpp
@@ -282,7 +282,10 @@ static void draw_blobs(cv::Mat& preview_frame, const blob* blobs, unsigned nblob
     }
 }
 
-void PointExtractor::extract_points(const pt_frame& frame_, pt_preview& preview_frame_, std::vector<vec2>& points)
+void PointExtractor::extract_points(const pt_frame& frame_,
+                                    pt_preview& preview_frame_,
+                                    bool preview_visible,
+                                    std::vector<vec2>& points)
 {
     const cv::Mat& frame = frame_.as_const<Frame>()->mat;
 
@@ -402,9 +405,10 @@ end:
         b.pos[1] = pos[1] + rect.y;
     }
 
-    draw_blobs(preview_frame_.as<Frame>()->mat,
-               blobs.data(), blobs.size(),
-               frame_gray.size());
+    if (preview_visible)
+        draw_blobs(preview_frame_.as<Frame>()->mat,
+                   blobs.data(), blobs.size(),
+                   frame_gray.size());
 
 
     // End of mean shift code. At this point, blob positions are updated with hopefully less noisy less biased values.
diff --git a/tracker-pt/module/point_extractor.h b/tracker-pt/module/point_extractor.h
index 9c97b6ce..ab906414 100644
--- a/tracker-pt/module/point_extractor.h
+++ b/tracker-pt/module/point_extractor.h
@@ -33,7 +33,9 @@ class PointExtractor final : public pt_point_extractor
 public:
     // extracts points from frame and draws some processing info into frame, if draw_output is set
     // dt: time since last call in seconds
-    void extract_points(const pt_frame& frame, pt_preview& preview_frame, std::vector<vec2>& points) override;
+    void extract_points(const pt_frame& frame,
+                        pt_preview& preview_frame, bool preview_visible,
+                        std::vector<vec2>& points) override;
     PointExtractor(const QString& module_name);
 private:
     static constexpr int max_blobs = 16;