diff --git a/img/prefilteringapproach.png b/img/prefilteringapproach.png
new file mode 100644
index 0000000000000000000000000000000000000000..1c86bab7b87cd47af8d4c5b217605f144c3d0523
Binary files /dev/null and b/img/prefilteringapproach.png differ