diff --git a/bv/uebung4.m b/bv/uebung4.m
index 7c4d932..abafa53 100644
--- a/bv/uebung4.m
+++ b/bv/uebung4.m
@@ -1,8 +1,23 @@
+% 2.
+fingerprint = imread('fingerprint.png');
+rec0 = strel('rectangle', [2, 2]);
+lin1 = strel('line', 3, 0);
+disk = strel('disk', 1, 4);
+rec1 = strel('rectangle', [3 5]);
+rec2 = strel('rectangle', [2, 2]);
+opened1 = imopen(fingerprint, lin1);
+opened2 = imopen(opened1, rec0);
+opened3 = imopen(opened2, disk);
+figure (1), imshow(fingerprint);
+figure (2), imshow(opened1);
+figure (3), imshow(opened2);
+figure (4), imshow(opened3);
+
 % 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
+%figure (4), imshow(img);
+%figure (5), imshow(dilated_img);
+%figure (6), imshow(eroded_img);
\ No newline at end of file