diff --git a/Processing/processing.cpp b/Processing/processing.cpp
index 9d57e4a..03ef42a 100644
--- a/Processing/processing.cpp
+++ b/Processing/processing.cpp
@@ -16,6 +16,7 @@ void Processing::processImage(Mat& inputPicture, int thresholdValue, int gaussKe
     // No return value here as the input is passed by reference -> directly modified.
     cvtColor(inputPicture, inputPicture, COLOR_BGR2GRAY);
     threshold(inputPicture, inputPicture, thresholdValue, 255, THRESH_BINARY);
+    GaussianBlur(inputPicture, inputPicture, Size(gaussKernelSize, gaussKernelSize), 0);
 }
 
 std::vector<LFRLine> Processing::calculateLineSegments(const Mat& inputPicture)