diff --git a/openbr/plugins/filter.cpp b/openbr/plugins/filter.cpp
index c57ca1c..48fbe75 100644
--- a/openbr/plugins/filter.cpp
+++ b/openbr/plugins/filter.cpp
@@ -61,11 +61,23 @@ class BlurTransform : public UntrainableTransform
 {
     Q_OBJECT
     Q_PROPERTY(float sigma READ get_sigma WRITE set_sigma RESET reset_sigma STORED false)
+    Q_PROPERTY(bool ROI READ get_ROI WRITE set_ROI RESET reset_ROI STORED false)
     BR_PROPERTY(float, sigma, 1)
+    BR_PROPERTY(bool, ROI, false)
 
     void project(const Template &src, Template &dst) const
     {
-        GaussianBlur(src, dst, Size(0,0), sigma);
+        if (!ROI) GaussianBlur(src, dst, Size(0,0), sigma);
+        else {
+            dst.m() = src.m();
+            foreach (const QRectF &rect, src.file.rects()) {
+                Rect region(rect.x(), rect.y(), rect.width(), rect.height());
+                Mat input = dst.m();
+                Mat output = input.clone();
+                GaussianBlur(input(region), output(region), Size(0,0), sigma);
+                dst.m() = output;
+            }
+        }
     }
 };
 
diff --git a/openbr/plugins/gui.cpp b/openbr/plugins/gui.cpp
index 80f6174..3aab218 100644
--- a/openbr/plugins/gui.cpp
+++ b/openbr/plugins/gui.cpp
@@ -764,7 +764,8 @@ public:
                         }
                         else
                         {
-                            dst[i].file.set(labelSet[idx], rectSet[idx]);
+                            if (labels.isEmpty()) dst[i].file.appendRect(rectSet[idx]);
+                            else dst[i].file.set(labelSet[idx], rectSet[idx]);
                         }
                     }
                 }