diff --git a/bv/uebung4.m b/bv/uebung4.m
new file mode 100644
index 0000000..7c4d932
--- /dev/null
+++ b/bv/uebung4.m
@@ -0,0 +1,8 @@
+% 3.
+img = logical([1 0 0 0 1 1 1 0 1 1]);
+se = strel('line', 3, 0);
+dilated_img = imdilate(img, se);
+eroded_img = imerode(img, se);
+figure (1), imshow(img);
+figure (2), imshow(dilated_img);
+figure (3), imshow(eroded_img);
\ No newline at end of file