diff --git a/filter/mog.go b/filter/mog.go
index ca318140..20fd5807 100644
--- a/filter/mog.go
+++ b/filter/mog.go
@@ -40,8 +40,8 @@ import (
 // MOGFilter is a filter that provides basic motion detection. MoG is short for
 // Mixture of Gaussians method.
 type MOGFilter struct {
-	dst     io.WriteCloser                 // Writer and closer interface.
-	area    float64                        // Minimum area that motion.
+	dst     io.WriteCloser                 // Destination to which motion containing frames go.
+	area    float64                        // The minimum area that a contour can be found in.
 	bs      *gocv.BackgroundSubtractorMOG2 // Uses the MOG algorithm to find the difference between the current and background frame.
 	knl     gocv.Mat                       // Matrix that is used for calculations.
 	debug   bool                           // If true then debug windows with the bounding boxes and difference will be shown on the screen.