diff --git a/hough_machine.cpp b/hough_machine.cpp
index 0b812fa..bf38c0a 100644
--- a/hough_machine.cpp
+++ b/hough_machine.cpp
@@ -59,7 +59,6 @@ class HoughMachine {
     };
         
     void run(int a_steps, int r_steps) {
-      this->reset();
       this->x_center = this->original->width()/2;
       this->y_center = this->original->height()/2;
       this->n_ang = a_steps;
@@ -84,9 +83,11 @@ class HoughMachine {
 	  pixel.getHsl(&h, &s, &l);
 	  if(this->matching_threshold > 0) {
 	    int threshold = this->matching_threshold;
+	    std::cout << "Comparing " << l << " < " << threshold << std::endl;
 	    if(l < threshold) this->doPixel(u, v);
 	  } else {
 	    int threshold = -this->matching_threshold;
+	    std::cout << "Comparing " << l << " > " << threshold << std::endl;
 	    if(l > threshold) this->doPixel(u, v);
 	  }
 	}
diff --git a/imageviewer-qt4.cpp b/imageviewer-qt4.cpp
index 79aff10..871ff53 100644
--- a/imageviewer-qt4.cpp
+++ b/imageviewer-qt4.cpp
@@ -771,14 +771,14 @@ void ImageViewer::doUnsharpMasking(void) {
  * @brief ImageViewer::runHoughTransformation
  */
 void ImageViewer::runHoughTransformation(void) {
-  logFile << "Let's run a hough transformation!" << std::endl;
+  int threshold = hough_pixel_threshold->value();
+  logFile << "Let's run a hough transformation! Threshold is " << threshold << std::endl;
   renewLogging();
   HoughMachine* hm = new HoughMachine(original, working_copy);
-  hm->setMatchingThreshold(15);
+  hm->reset();
+  hm->setMatchingThreshold(threshold);
   hm->run(256, 256);
-  
-  hm->drawLines(10);
-  
+  hm->drawLines(10);  
   delete hm;
   updateImageDisplay();  
 }
@@ -1126,7 +1126,15 @@ void ImageViewer::generateControlPanels() {
   run_hough_transformation = new QPushButton("Run hough transformation!");
   QObject::connect(run_hough_transformation, SIGNAL(clicked()), this, SLOT(runHoughTransformation()));
   
-  task_tab6_scrolllayout->addWidget(new QLabel("Task #6 and stuff"));
+  hough_pixel_threshold = new QDoubleSpinBox();
+  hough_pixel_threshold->setDecimals(0);
+  hough_pixel_threshold->setMinimum(-255);
+  hough_pixel_threshold->setMaximum(255);
+  hough_pixel_threshold->setValue(15);
+  
+  task_tab6_scrolllayout->addWidget(new QLabel("Pixel threshold for hough transformation:"));
+  task_tab6_scrolllayout->addWidget(new QLabel("[negative value -> intensity < threshold matches]"));
+  task_tab6_scrolllayout->addWidget(hough_pixel_threshold);
   task_tab6_scrolllayout->addWidget(run_hough_transformation);
   
   tabWidget->addTab(task_tab6_widget, "Task #6");
diff --git a/imageviewer-qt4.h b/imageviewer-qt4.h
index 5cc117d..28422b2 100644
--- a/imageviewer-qt4.h
+++ b/imageviewer-qt4.h
@@ -168,6 +168,7 @@ class ImageViewer : public QMainWindow {
     QScrollArea* task_tab6_scrollarea;
     QVBoxLayout* task_tab6_scrolllayout;
     
+    QDoubleSpinBox* hough_pixel_threshold;
     QPushButton* run_hough_transformation;
     
     // "My" space for storing data/results