diff --git a/bv/uebung7_presence.m b/bv/uebung7_presence.m
new file mode 100644
index 0000000..587d938
--- /dev/null
+++ b/bv/uebung7_presence.m
@@ -0,0 +1,36 @@
+% 1.
+peppers = rgb2gray(imread('peppers.png'));
+peppers_smooth = imgaussfilt(peppers, 3);
+peppers_fft = fft2(peppers);
+peppers_smooth_fft = fft2(peppers_smooth);
+
+sum_peppers = sum(peppers(:));
+first_el = peppers_fft(1, 1);
+
+peppers_fftshift = fftshift(log(abs(peppers_fft)));
+peppers_smooth_fftshift = fftshift(log(abs(peppers_smooth_fft)));
+
+%figure (1), imshow(peppers);
+%figure (2), imshow(peppers_smooth);
+%figure (3), imshow (log(abs(peppers_fft)), []);
+%figure (4), imshow (log(abs(peppers_smooth_fft)), []);
+%figure (5), imshow(peppers_fftshift, []);
+%figure (6), imshow(peppers_smooth_fftshift, []);
+%figure (7), imshow(fftshift(peppers))
+
+%---------
+tissue = rgb2gray(imread('tissue.png'));
+tissue_fft = fft2(tissue);
+tissue_fft_processed = log(abs(tissue_fft));
+tissue_fft_shifted_processed = fftshift(tissue_fft_processed);
+
+figure (8), imshow(tissue);
+figure (9), imshow(tissue_fft_shifted_processed, []);
+
+test = imread('testpat1.png');
+test_fft = fft2(test);
+test_fft_processed = log(abs(test_fft));
+test_fft_shifted_processed = fftshift(test_fft_processed);
+
+figure (10), imshow(test);
+figure (11), imshow(test_fft_shifted_processed , []);