diff --git a/openbr/plugins/metadata/randomrects.cpp b/openbr/plugins/metadata/randomrects.cpp
index 9f86088..179ba5c 100644
--- a/openbr/plugins/metadata/randomrects.cpp
+++ b/openbr/plugins/metadata/randomrects.cpp
@@ -4,6 +4,9 @@
 
 #include <openbr/plugins/openbr_internal.h>
 #include <openbr/core/opencvutils.h>
+#include "opencv2/imgproc/imgproc.hpp"
+
+using namespace cv;
 
 namespace br
 {
@@ -18,8 +21,15 @@ class RandomRectsTransform : public UntrainableMetaTransform
     Q_OBJECT
     Q_PROPERTY(int numRects READ get_numRects WRITE set_numRects RESET reset_numRects STORED false)
     Q_PROPERTY(int minSize READ get_minSize WRITE set_minSize RESET reset_minSize STORED false)
+    Q_PROPERTY(bool sameSize READ get_sameSize WRITE set_sameSize RESET reset_sameSize STORED false)
+    Q_PROPERTY(bool filterDarkPatches READ get_filterDarkPatches WRITE set_filterDarkPatches RESET reset_filterDarkPatches STORED false)
+    Q_PROPERTY(float bgFgThresh READ get_bgFgThresh WRITE set_bgFgThresh RESET reset_bgFgThresh STORED false)
+
     BR_PROPERTY(int, numRects, 135)
     BR_PROPERTY(int, minSize, 24)
+    BR_PROPERTY(bool, sameSize, false)
+    BR_PROPERTY(bool, filterDarkPatches, false)
+    BR_PROPERTY(float, bgFgThresh, 0.75)
 
     void project(const Template &, Template &) const
     {
@@ -28,13 +38,28 @@ class RandomRectsTransform : public UntrainableMetaTransform
 
     void project(const TemplateList &src, TemplateList &dst) const
     {
+        int size = minSize;
         foreach (const Template &t, src) {
             int maxSize = std::min(t.m().rows, t.m().cols);
             for (int i = 0; i < numRects; i++) {
-                int size = (rand() % (maxSize - minSize)) + minSize;
+
+                if (!sameSize){
+                     size = (rand() % (maxSize - minSize)) + minSize;
+                }
+
                 int x = rand() % (t.m().cols - size);
                 int y = rand() % (t.m().rows - size);
 
+                if (filterDarkPatches){
+                    Mat patch;
+                    t.m()(cv::Rect(x,y,size,size)).copyTo(patch);
+                    cv::threshold(patch,patch,5,1,cv::THRESH_BINARY);
+                    Scalar sumForeground = sum(patch);
+                    float bgFgRatio = sumForeground[0] / float(minSize * minSize);
+                    if (bgFgRatio < bgFgThresh)
+                        continue;
+                }
+
                 Template out(t.file, t.m());
                 out.file.clearRects();
                 out.file.appendRect(QRect(x,y,size,size));