diff --git a/openbr/plugins/opticalflow.cpp b/openbr/plugins/opticalflow.cpp
index 4409ada..dd5a9ab 100644
--- a/openbr/plugins/opticalflow.cpp
+++ b/openbr/plugins/opticalflow.cpp
@@ -13,32 +13,32 @@ namespace br
  */
 class OpticalFlowTransform : public UntrainableTransform
 {
-	Q_OBJECT
-	// these defaults are optimized for KTH
-	Q_PROPERTY(double pyr_scale READ get_pyr_scale WRITE set_pyr_scale RESET reset_pyr_scale STORE false)
-	BR_PROPERTY(double, pyr_scale, 0.1)
-	Q_PROPERTY(int levels READ get_levels WRITE set_levels RESET reset_levels STORE false)
-	BR_PROPERTY(int, levels, 1)
-	Q_PROPERTY(int winsize READ get_winsize WRITE set_winsize RESET reset_winsize STORE false)
-	BR_PROPERTY(int, winsize, 5)
-	Q_PROPERTY(int iterations READ get_iterations WRITE set_iterations RESET reset_iterations STORE false)
-	BR_PROPERTY(int, iterations, 10)
-	Q_PROPERTY(int poly_n READ get_poly_n WRITE set_poly_n RESET reset_poly_n STORE false)
-	BR_PROPERTY(int, poly_n, 7)
-	Q_PROPERTY(double poly_sigma READ get_poly_sigma WRITE set_poly_sigma RESET reset_poly_sigma STORE false)
-	BR_PROPERTY(double, poly_sigma, 1.1)
-	Q_PROPERTY(int flags READ get_flags WRITE set_flags RESET reset_flags STORE false)
-	BR_PROPERTY(int, flags, 0)
+    Q_OBJECT
+    // these defaults are optimized for KTH
+    Q_PROPERTY(double pyr_scale READ get_pyr_scale WRITE set_pyr_scale RESET reset_pyr_scale STORE false)
+    BR_PROPERTY(double, pyr_scale, 0.1)
+    Q_PROPERTY(int levels READ get_levels WRITE set_levels RESET reset_levels STORE false)
+    BR_PROPERTY(int, levels, 1)
+    Q_PROPERTY(int winsize READ get_winsize WRITE set_winsize RESET reset_winsize STORE false)
+    BR_PROPERTY(int, winsize, 5)
+    Q_PROPERTY(int iterations READ get_iterations WRITE set_iterations RESET reset_iterations STORE false)
+    BR_PROPERTY(int, iterations, 10)
+    Q_PROPERTY(int poly_n READ get_poly_n WRITE set_poly_n RESET reset_poly_n STORE false)
+    BR_PROPERTY(int, poly_n, 7)
+    Q_PROPERTY(double poly_sigma READ get_poly_sigma WRITE set_poly_sigma RESET reset_poly_sigma STORE false)
+    BR_PROPERTY(double, poly_sigma, 1.1)
+    Q_PROPERTY(int flags READ get_flags WRITE set_flags RESET reset_flags STORE false)
+    BR_PROPERTY(int, flags, 0)
 
-	void project(const Template &src, Template &dst) const
-	{
-		// get the two images put there by AggregateFrames
-		Mat prevImg = src[0];
-		Mat nextImg = src[1];
-		Mat flow;
-		calcOpticalFlowFarneback(prevImg, nextImg, flow, pyr_scale, levels, winsize, iterations, poly_n, poly_sigma, flags);
-		dst += flow;
-	}
+    void project(const Template &src, Template &dst) const
+    {
+        // get the two images put there by AggregateFrames
+        Mat prevImg = src[0];
+        Mat nextImg = src[1];
+        Mat flow;
+        calcOpticalFlowFarneback(prevImg, nextImg, flow, pyr_scale, levels, winsize, iterations, poly_n, poly_sigma, flags);
+        dst += flow;
+    }
 };
 
 BR_REGISTER(Transform, OpticalFlowTransform)